Tesis sobre el tema "Biology - biotechnology"
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Cupples, Gemma. "Fibre-laden flows in biology and biotechnology". Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8308/.
Texto completoWillrodt, Christian. "Synthetic biology for synthetic chemistry - Microbial production and selective functionalization of limonene". Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-201140.
Texto completoHudson, Cheryl A. "Impact of biotechnology labs on high school biology students". Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/hudson/HudsonC0811.pdf.
Texto completoMadani, Fatemeh. "Biophysical studies of peptides with functions in biotechnology and biology". Doctoral thesis, Stockholms universitet, Institutionen för biokemi och biofysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-66948.
Texto completoAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Manuscript.
Funder, Joshua V. "Biology, information and property : the legal appropriation of plant biotechnology". Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365449.
Texto completoSoenksen, Martinez Luis Rubén. "Cell-free freeze-dried synthetic biology for wearable biotechnology applications". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/127730.
Texto completoCataloged from PDF of thesis. "February 2020."
Includes bibliographical references (pages 163-173).
Synthetic biology aims to develop modular genetic networks for computation, sensing, and control of biological systems, holding great promise for next-generation biosensing platforms. Similarly, advances in material sciences have allowed for the design of substrates and textiles engineered to exhibit novel mechanical, electrical, and optical properties for sensing and actuation. Wearable biosensors using synthetic biology principles and smart materials could expand on this potential, especially as solutions for continuous, fine-grained monitoring of physiological status, disease states, and pathogen/toxin exposure difficult to assess with other methods. Despite this, only few examples of synthetic biology sensors compatible with wearable use-cases have been described, all of which rely on the use of live engineered bacteria with sustainment limitations.
Thus, we report on the development of novel shelf-stable, genetically-programmable, and highly sensitive wearable sensing platforms based on cell-free synthetic biology components freeze-dried into flexible substrates and textiles; as well as on a new class of smart programmable synthetic biology materials capable of reacting to environmental queues. These systems were designed to exhibit colorimetric, fluorescent, luminescence, electrical, or mechanical outputs that can be passively or actively interrogated within isolated modules or in larger-scale garments with wireless networking capabilities. We functionally validated such platforms using a variety of synthetic biology circuits for detecting several relevant environmental exposure targets such as metabolites, chemicals, and pathogen-associated nucleic acids.
These findings suggest that cell-free synthetic biology tools have the potential to enable highly programmable wearable systems for rapid on-body detection or adaptation to external threats in first responders, warfighters or clinical personnel, as well as the assessment of athletic performance and monitoring to complex disease states.
by Luis Rubén Soenksen Martinez.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Mechanical Engineering
Camsund, Daniel. "Engineering Transcriptional Systems for Cyanobacterial Biotechnology". Doctoral thesis, Uppsala universitet, Molekylär biomimetik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-223599.
Texto completoBigler, Amber L. "Student Content Knowledge Increases After Participation in a Hands-on Biotechnology Intervention". BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2522.
Texto completoDias, Camila Arnaldo Olhê [UNESP]. "Análise estrutural e funcional de eIF5A selvagem e mutadas". Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/100727.
Texto completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O fator de início de tradução 5A (eIF5A) é altamente conservado de arqueas a mamíferos e é essencial para a viabilidade celular. Este fator tem sido associado com o início da tradução, proliferação celular, transporte nucleocitoplasmático e decaimento de mRNA. Estudos recentes associam eIF5A com a elongação, ao invés do inicio da tradução. eIF5A é a única proteína conhecida que contém o aminoácido essencial hipusina, gerado pelas enzimas desoxihipusina sintase e desoxihipusina hidroxilase. O objetivo deste estudo foi a caracterização estrutural e funcional de eIF5A de S. cerevisiae. Primeiramente, a estrutura terciária de eIF5A foi determinada por cristalografia e foi demonstrada a sua dimerização em solução, independentemente do resíduo hipusina. Foram obtidos e caracterizados 40 mutantes novos de eIF5A, dos quais 19 não complementaram o nocaute do gene selvagem, 13 apresentaram fenótipo de termossensibilidade e 8 não apresentaram nenhuma alteração nos fenótipos investigados. A maioria dos mutantes novos tem seus fenótipos resultantes da degradação da proteína eIF5A. Curiosamente, este é o primeiro estudo que sugere que a α-hélice presente no C-terminal de eIF5A é essencial para a manutenção da sua estrutura. Descrevemos também, que a extensão N-terminal de eIF5A, presente apenas em eucariotos, não é essencial para estrutura e função dessa proteína. Além disso, os mutantes contendo substituições na alça onde está localizado o aminoácido hipusina são inviáveis ou termossensíveis. Embora estes mutantes produzam eIF5A, inclusive na temperatura não permissiva, a proteína produzida não é hipusinada. Finalmente, dois mutantes termossensíveis (tif51AK56A e tif51AQ22H/L93F) produzem a proteína eIF5A estável na temperatura não permissiva, no entanto, apresentam...
The translation initiation factor 5A (eIF5A) is highly conserved from archae to mammals and is essential for cell viability. This factor has been associated with translation initiation, cell proliferation, nucleocytoplasmatic transport and mRNA decay. Recent studies show eIF5A involved in elongation, rather than translation initiation. eIF5A is the only protein known to contain the essential amino acid residue hypusine, generated by the enzymes deoxyhypusine synthase and deoxyhypusine hydroxylase. The main goal of this study was the structural and functional characterization of S. cerevisiae eIF5A. First of all, the tertiary structure of eIF5A was determined by crystallography and this protein was defined as a dimer in solution, independently of the hipusine residue. We obtained and characterized 40 new mutants, which 19 cannot complement tif51A knockout cells, 13 are temperature-sensitive and 8 show no detectable phenotype. The phenotypes of most mutantes are caused by protein folding defects. Interestingly, this is the first study suggesting that the C-terminal -helix present in yeast eIF5A may be an essential structural element. Moreover, we describe that the eIF5A N-terminal extension present only in eukaryotic homologues is not essential in yeast. Furthermore, the mutants containing substitutions surrounding the hypusine modification site showed unviable or temperature-sensitive phenotypes. Although these mutant proteins were stable, they were defective in hypusine modification. Finally, two of the temperature-sensitive mutant strains (tif51AK56A and tif51AQ22H/L93F) produced stable eIF5A protein but showed defects in growth and protein synthesis and these mutants revealed polysome profile defect similar to that described for mutations in factors involved in translation... (Complete abstract click electronic access below)
Kim, Daniel. "Characterization of the MATα pre-/pro- peptide by mutagenesis as a means to optimize secretion in pichia pistoris". Scholarly Commons, 2009. https://scholarlycommons.pacific.edu/uop_etds/738.
Texto completoUys, Lafras. "Computational systems biology of sucrose accumulation in sugarcane". Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/245.
Texto completoBücking, Clemens [Verfasser] y J. [Akademischer Betreuer] Gescher. "Biology and biotechnology of dissimilatory metal reduction in Shewanella oneidensis / Clemens Bücking. Betreuer: J. Gescher". Karlsruhe : KIT-Bibliothek, 2012. http://d-nb.info/1037154258/34.
Texto completoBrusman, Anna-Lena. "Etiska aspekter av preimplantatorisk genetisk diagnostik och genterapi". Thesis, Linköping University, The Department of Physics, Chemistry and Biology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10019.
Texto completoThe research in the field of biotechnology is rapidly developing all over the world. Modern biotechnology offers unique opportunities, simultaneously as it gives rise to a number of ethical issues. Preimplantation genetic diagnosis (PGD), PGD/HLA (Human Leucocyte Antigen) and germline gene therapy (GLGT) are controversial techniques. PGD gives a possibility to identify a genetic disease prior to the embryo’s implantation in the uterus. PGD/HLA involves selecting an embryo with genes coding for a specific tissue type, so that the child to be born can act as a donor to an existing sibling who requires a stem cell transplant. GLGT seeks to eliminate or change “bad” genes.
The purpose of this study is to investigate student’s ethical attitude concerning PGD, PGD/HLA and GLGT.
The empirical study was based on focus group discussions. Four group interviews were made, with 15 participants in all. The students are taking courses in biology or religion.
The result from the interviews shows that the ethical issues are difficult to have a definite opinion in, because there are possibilities and risks involved in all these techniques, according to the students. A central part of the discussion was devoted to human dignity and the moral status of the embryo. They also see risks such as bioterrorism, designing the perfect humans, economic interests, medical risks, among many other risks.
Forskningen på det bioteknologiska området utvecklas snabbt över hela världen. Den moderna bioteknologin erbjuder unika möjligheter, samtidigt som den ger upphov till en rad frågor av etiskt slag. Preimplantatorisk genetisk diagnostik (PGD), PGD/HLA (Human Leucocyte Antigen) och zygotisk genterapi är kontroversiella tekniker. PGD ger en möjlighet att identifiera genetiska sjukdomar före embryots implantering i livmodern. Med hjälp av PGD/HLA väljs ett embryo ut vars gener kodar för en specifik vävnadstyp, vilket gör att barnet som föds kan fungera som donator till ett existerande syskon som är i behov av en stamcells transplantation. Med zygotisk genterapi kan man ta bort eller byta ut ”dåliga” gener.
Syftet med uppsatsen är att undersöka studenters etiska värderingar rörande PGD, PGD/HLA och zygotisk genterapi.
Den empiriska studien baserades på fokusgrupp diskussioner. Fyra gruppintervjuer gjordes, med sammanlagt 15 deltagare. Studenterna studerar på programutbildningar i biologi eller religion.
Resultatet från intervjuerna visar att de etiska frågeställningarna är svåra att ha en klar uppfattning om, eftersom det finns möjligheter och risker med alla dessa tekniker, enligt studenterna. En central del av diskussionen ägnades åt människovärdet och embryots moraliska status. De ser också risker som bioterrorism, designa perfekta människor, ekonomiska intressen, medicinska risker, bland många andra risker.
Lang, Claus. "Magnetosome-specific expression of chimeric proteins in Magnetospirillum gryphiswaldense for applications in cell biology and biotechnology". Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-105376.
Texto completoCamargo, Ramírez Rosany del Carmen. "Function of microRNAs in plant innate immunity". Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/405716.
Texto completoThis thesis comprises the study of miRNAs in innate immunity in plants. The work has been developed in rice (Chapter I and Chapter II) and in Arabidopsis (Chapter III), model systems used in studies of functional genomics in monocotyledonous and dicotyledonous species, respectively. Chapter I describes the functional identification and characterization of new rice miRNAs in their interaction with the fungus Magnaporthe oryzae. This fungus is responsible for blast disease, one of the most devastating diseases for rice cultivation worldwide. From the information generated by high-throughput sequencing of small rice RNA libraries, candidate sequences to represent novel rice miRNAs were selected. In this work 5 of these candidates have been studied (miR-64, miR-75, miR-96, miR-98 and miR-203). Obtaining transgenic rice lines has demonstrated that the overexpression of MIR-64 and MIR-75 confers resistance to M. oryzae, therefore these miRNAs function as positive regulators in the rice immune response. Moreover, overexpression of MIR-96, MIR-98 or MIR-203 increase susceptibility to M. oryzae in rice plants (negative regulators of immune response). Analysis of rice mutants affected in the miRNA biogenesis (dcl1, dcl3 and dcl4 mutants) indicate that the mature miRNA production of miR-64, miR-75 or miR-96 depends on DCL3 and/or DCL4, which supports the idea that they are novel rice miRNAs. Furthermore, by gene editing using CRISPR/Cas9, it has been found that a 22 nucleotides deletion in miR-75 precursor results in a susceptibility phenotype under M. oryzae infection (Chapter II), in agreement with a resistance phenotype that was observed in overexpressor plants for this miRNA. In chapter III, the miR858 function in Arabidopsis thaliana innate immunity to infection by pathogenic fungi was studied. This miRNA represses the expression of MYB transcription factors, which act as activators of the expression of genes involved in flavonoids biosynthesis. Plants are resistant to infection by pathogenic fungi (Plectosphaerella cucumerina, Fusarium oxysporum f. sp. Conglutinans and Colletotrichum higginsianum) when the activity of miR858 is blocked by the expression of target mimicry (MIM858 plants), while the overexpression of this miRNA confers greater susceptibility to infection. Additionally, interference with miR858 activity and consequent increase of MYB gene expression in MIM858 plants significantly affects phenylpropanoids metabolism, favoring the synthesis and accumulation of flavonoids, and disfavoring the synthesis of lignin precursors. The antifungal activity that was observed for Kaempferol, naringenin (flavonoids) and p-Coumaric acid, would explain the resistant phenotype by fungi infection which is observed in the MIM858 plants. Altogether, the results obtained in this work demonstrate that miRNAs are an important component in the resistance/susceptibility to infection by pathogenic fungi in Arabidopsis and rice plants. Greater knowledge of miRNA function in plant innate immunity and processes that are regulate by these riboregulators, can be useful in the design of new strategies for the control of diseases in plants.
Arnosti, Lis Velosa [UNESP]. "Reação de trans-splicing in vitro utilizando extrato nuclear livre de células e sequencia parcial de alfa tubulina de Trypanosoma cruzi". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/88008.
Texto completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A família Trypanosomatidae compreende um grande número de protozoários parasitas, incluindo importantes agentes etiológicos de doenças humanas. Entre os causadores de doenças, destaca-se o Trypanosoma brucei (responsável pela Doença do Sono) e o Trypanosoma cruzi (agente causador da Doença de Chagas). Ambos possuem como mecanismo de processamento dos seus mRNAs o “trans-splicing”, que envolve a excisão de íntrons e a união dos éxons de dois transcritos independentes, o splice-leader, e o pré-mRNA aceptor. As reações de cis e trans-splicing in vitro com extrato nuclear de células HeLa já foram padronizadas e utilizada como modelo em diversos experimentos. Entretanto, em tripanosomas, as únicas referências sobre a reação de transsplicing in vitro são de Vianna et. al., (2001) e Skaked et. al., (2010), com extratos de parasitas preparados de modos diferentes. A reação com células permeáveis do Trypanosoma cruzi foi usada como modelo para análise de drogas tripanocidas na reação de trans-splicing (Barbosa et. al., 2007); porém, não é um sistema livre de células conforme mencionado acima. Diante disso, este trabalho propõe reproduzir a reação de “trans-splicing” in vitro com extratos nucleares livre de parasitas utilizando as formas epimastigotas de T. cruzi e/ou as formas prociclicas de T. brucei e uma sequência parcial de alfa tubulina de T. cruzi como pré-mRNA aceptor. A padronização desta reação in vitro possibilitará avanços no entendimento da maquinaria do trans-spliceossomo, tornando-se também um modelo interessante para avaliação de mecanismo de ação de drogas tripanocidas
Trypanosomatidae family comprises a large number of protozoan parasites, including important etiological agents of neglected human diseases. Among the diseases’ agents, Trypanosoma brucei (responsible for sleeping sickness) and Trypanosoma cruzi (causative agent of Chagas' disease) are the most important parasites. Both have trans-splicing as a mechanism for the processing of its mRNA, which involves the excision of introns and union of exons form two independent transcripts, the spliceleader (SLRNA), and the acceptor pre-mRNA. The reaction of cis-and transsplicing in vitro with nuclear extract of HeLa cells has already been standardized and used as a model in several experiments. However, in trypanosomes, the only references on the reaction of trans-splicing in vitro are from Vianna et. al., (2001) and Skaked et. al., (2010), using parasitefree extracts prepared on different methods. For trypanocidal drugs analyze, trans-splicing reaction using T. cruzi permeable cells was used as a model (Barbosa et. al., 2007), but this is not the same as free-cell nuclear extract as mentioned above. Thus, this work shows trans-splicing in vitro reaction using nuclear extracts either from T. cruzi epimastigote forms and/or T. brucei procyclic forms reacting with the T. cruzi alpHa-tubulin cloned sequence as pre-mRNA acceptor. The standardization of this in vitro reaction will be able to promote advances to understanding the transspliceosomo machinery, as well as occurred in mammalian cis- and/or trans-splicing, becoming also an interesting model for evaluating trypanocidal drugs interference
Dias, Camila Arnaldo Olhê. "Análise estrutural e funcional de eIF5A selvagem e mutadas /". Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/100727.
Texto completoAbstract: The translation initiation factor 5A (eIF5A) is highly conserved from archae to mammals and is essential for cell viability. This factor has been associated with translation initiation, cell proliferation, nucleocytoplasmatic transport and mRNA decay. Recent studies show eIF5A involved in elongation, rather than translation initiation. eIF5A is the only protein known to contain the essential amino acid residue hypusine, generated by the enzymes deoxyhypusine synthase and deoxyhypusine hydroxylase. The main goal of this study was the structural and functional characterization of S. cerevisiae eIF5A. First of all, the tertiary structure of eIF5A was determined by crystallography and this protein was defined as a dimer in solution, independently of the hipusine residue. We obtained and characterized 40 new mutants, which 19 cannot complement tif51A knockout cells, 13 are temperature-sensitive and 8 show no detectable phenotype. The phenotypes of most mutantes are caused by protein folding defects. Interestingly, this is the first study suggesting that the C-terminal -helix present in yeast eIF5A may be an essential structural element. Moreover, we describe that the eIF5A N-terminal extension present only in eukaryotic homologues is not essential in yeast. Furthermore, the mutants containing substitutions surrounding the hypusine modification site showed unviable or temperature-sensitive phenotypes. Although these mutant proteins were stable, they were defective in hypusine modification. Finally, two of the temperature-sensitive mutant strains (tif51AK56A and tif51AQ22H/L93F) produced stable eIF5A protein but showed defects in growth and protein synthesis and these mutants revealed polysome profile defect similar to that described for mutations in factors involved in translation... (Complete abstract click electronic access below)
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Coorientador: Cleslei Fernando Zanelli
Banca: Henrique Ferreira
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Doutor
Chakraborty, Ranjan. "Iron Uptake in Bacteria with Emphasis on E. coli and Pseudomonas". Digital Commons @ East Tennessee State University, 2013. http://amzn.com/9400760876.
Texto completohttps://dc.etsu.edu/etsu_books/1036/thumbnail.jpg
SCALVENZI, Laura. "Amazonian plants from ethnomedicine to biotechnology through pharmaceutical biology approaches: a PhD experience in connecting forest with laboratory". Doctoral thesis, Università degli studi di Ferrara, 2011. http://hdl.handle.net/11392/2389376.
Texto completoBaktula, Avinash M. "A Method Based on Conserved Multiple Amino Acid Properties to Predict Amino Acid Substitutions Which Maintain the Protein Structure". TopSCHOLAR®, 2004. http://digitalcommons.wku.edu/theses/1107.
Texto completoGuragain, Bhuwan. "Transcriptional co-repressor response of Arabidopsis thaliana to different abiotic stress". ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1738.
Texto completoMaynard, Ronald J. "Risking the future : biomedicine and modernity in the lives of adults with cystic fibrosis /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6402.
Texto completoSarrión, Perdigones Manuel Alejandro. "Design and development of modular DNA assembly tools for Multigene Engineering and Synthetic Biology in Plants". Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/35399.
Texto completoSarrión Perdigones, MA. (2014). Design and development of modular DNA assembly tools for Multigene Engineering and Synthetic Biology in Plants [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/35399
TESIS
Avaca, Crusca Juliana Sposto [UNESP]. "Análise de interação funcional de elF5A com a tradução, repressão da tradução e degradação de mRNA em Saccharomyces cerevisiae". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/100736.
Texto completoFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O provável fator de início de tradução 5A (eIF5A) é altamente conservado de arqueas a mamíferos e sofre uma modificação pós-traducional única e essencial, em que uma lisina específica é convertida em um resíduo de hipusina. Este fator já foi relacionado ao transporte nucleocitoplasmático, à degradação de mRNA e à proliferação celular. Dados recentes restabelecem uma função para eIF5A na tradução e sugerem a sua atuação na etapa de elongação ao invés de início, como originalmente proposto. Uma vez que o envolvimento de eIF5A com o degradação de mRNA ainda não foi elucidado, tornou-se interessante estudar qual a natureza desta relação. O metabolismo de mRNA é um processo complexo que envolve as etapas da tradução (mRNAs nos polissomos), repressão da tradução (mRNAs acumulados em grânulos de estresse) e degradação de mRNA (mRNAs nos P bodies). Os componentes da maquinaria de degradação de mRNA acumulam-se nos P bodies e, neste trabalho, foi verificado que eIF5A não se localiza nestes corpúsculos. Ainda, foi avaliada a formação de P bodies no mutante tif51A-3, na temperatura não permissiva (38ºC), e foi verificada uma inibição na formação de P bodies. Outros mutantes com defeitos na elongação da tradução, como cca1-1 e eft2H699K, também apresentaram defeito na agregação dos P bodies. Foi avaliada a existência de interação genética sintética entre os mutantes tif51A-1 e tif51A-3 e mutantes de fatores envolvidos com a repressão da tradução e/ou degradação de mRNA. Foi revelada uma supressão parcial do fenótipo de termossensibilidade com nocautes dos genes SBP1, DHH1 e PAT1, que codificam fatores ativadores da remoção do capacete e repressores da tradução. Por outro lado, uma interação sintético doente entre os mutantes tif51A-1 e xrn1Δ foi...
The putative translation initiation factor 5A (eIF5A) is highly conserved from archaea to mammals and undergoes an unique and essential post-translational modification, in which a specific lysine residue is converted into a hypusine residue. This factor has been involved in several cellular processes such as nucleocytoplasmic transport, mRNA decay and cell proliferation. Recent data have re-established a function for eIF5A in translation and suggests a role in elongation rather than initiation as originally proposed. Since the involvement of eIF5A with mRNA decay has not been elucidated it has become interesting to study the aspects of this relationship. mRNA metabolism is a complex process that involves the steps of translation (mRNAs on the polysomes), translation repression (mRNAs accumulated in granules) and mRNA degradation (mRNAs in P bodies). The mRNA degradation machinery accumulates in P bodies and in this study we have verified that eIF5A is not localized inside them. P bodies assembly was evaluated in the tif51A-3 mutant at non-permissive temperature and this aggregation was inhibited. Other mutant strains with defects in translation elongation, such as cca1-1 e eft2H699K, also presented defective P body assembly. The existence of synthetic genetic interactions between the eIF5A mutants, tif51A-1 and tif51A-3, and translation repression and/or mRNA decay mutants was evaluated. A partial suppression of the temperature sensitive phenotype of the eIF5A mutants was revealed when SBP1, DHH1 and PAT1 genes were deleted. Since those proteins are decapping activators and translational repressors these interactions reveal a putative function for eIF5A as an inhibitor of translation repression. However, a synthetic sick phenotype between tif51A-1 and xrn1Δ mutants was observed. Finally, stress granules... (Complete abstract click electronic access below)
Brohée, Sylvain. "Etude bioinformatique du réseau d'interactions entre protéines de transport ches les Fungi". Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210432.
Texto completoL'objectif global de notre travail consiste à combler ces lacunes et à préciser les interactions entre protéines membranaires chez la levure Saccharomyces cerevisiae et plus précisément, entre les transporteurs. Nous avons commencé notre travail par l'étude d'un jeu de données d'interactions à grande échelle entre toutes les perméases détectées par une méthode de double hybride spécialement adaptée aux protéines insolubles (split ubiquitin). Premièrement, la qualité des données a été estimée en étudiant le comportement global des données et des témoins négatifs et positifs. Les données ont ensuite été standardisées et filtrées de façon à ne conserver que les plus significatives. Ces interactions ont ensuite été étudiées en les modélisant dans un réseau d'interactions que nous avons étudié par des techniques issues de la théorie des graphes. Après une évaluation systématique de différentes méthodes de clustering, nous avons notamment recherché au sein du réseau des groupes de protéines densément interconnectées et de fonctions similaires qui correspondraient éventuellement à des complexes protéiques. Les résultats révélés par l'étude du réseau expérimental se sont révélés assez décevants. En effet, même si nous avons pu retrouver certaines interactions déjà décrites, un bon nombre des interactions filtrées semblait n'avoir aucune réalité biologique et nous n'avons pu retrouver que très peu de modules de protéines de fonction semblable hautement inter-connectées. Parmi ceux-ci, il est apparu que les transporteurs d'acides aminés semblaient interagir entre eux.
L'approche expérimentale n'ayant eu que peu de succès, nous l'avons contournée en utilisant des méthodes de génomique comparative d'inférence d'interactions fonctionnelles. Dans un premier temps, malgré une évaluation rigoureuse, l'étude des profils phylogénétiques (la prédiction d'interactions fonctionnelles en étudiant la corrééélation des profils de présence - absence des gènes dans un ensemble de génomes), n'a produit que des résultats mitigés car les perméases semblent très peu conservées dès lors que l'on considère d'autres organismes que les \
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Zhang, Xiaoli. "Using Silkworms as a Host to Spin Spider Silk-Like Fibers". DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6368.
Texto completoCampos, Katherine Helen de Sa. "Identification and characterization of components that overcome secretion limitations of the yeast Pichia pastoris". Scholarly Commons, 2013. https://scholarlycommons.pacific.edu/uop_etds/844.
Texto completoAntonio, Tatiana [UNESP]. "Obtenção de mutantes de Streptomyces clavuligerus e avaliação de condições de cultivo para a melhoria de produção de cefamicina C". Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/100744.
Texto completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Mutantes foram obtidos através de tratamento mutagênico dos esporos de S. clavuligerus ATCC 27064 com metil-metanosulfonato. Um total de 822 colônias, obtidas por repiques sucessivos, foram selecionadas em testes qualitativos e/ou quantitativos. O melhor mutante S. clavuligerus 45.41, mostrou-se de duas a quatro vezes mais produtivo que a linhagem selvagem, e manteve-se estável após 35 repiques sucessivos ao longo deste estudo. O comportamento das linhagens foi investigado pela adição de diferentes diaminas ao meio de cultivo, uma a uma, na ausência de lisina. Também se investigou duas fontes distintas de C, além de compostos como o ácido 2,6- diaminopimélico. Um planejamento de dois fatores (cadaverina e lisina), três níveis, baseado no ponto central, faces centradas, indicou que a adição de lisina aumenta a produção de CefC para ambas as linhagens. O efeito positivo da cadaverina foi observado principalmente na linhagem mutante 45.41. Resultados obtidos em processo de batelada, em biorreator de bancada confirmaram as diferenças observadas entre as linhagens nos cultivos em frascos agitados. Procedimento de mutagênese clássica foi utilizado em conjunto com critérios bem definidos para se estabelecer um meio de cultura apropriado, com o objetivo de alcançar um aumento significativo da produção de CefC. Este é o primeiro estudo utilizando um mutante de S. clavuligerus obtido por mutagênese clássica, cuja produção de CefC é de três vezes maior que a da linhagem selvagem, em meios contendo diaminas
Mutants were obtained by treating S. clavuligerus ATCC 27064 spores with methyl-methanesulfonate. A total of 822 colonies, obtained by successive sampling, were selected by qualitative and/or quantitative tests. The best mutant, S. clavuligerus 45.41, was two to four times more productive than the wild-type strain, and remained stable even after 35 successive samplings throughout the study. Strains behavior was investigated by adding different diamines in media, one by one, in the absence of lysine. Also investigated two different sources of C, and compounds such as 2,6-diaminopimelic acid. The two-factor (cadaverine and lysine), three-level, central composite-based, face-centered experimental design indicates that adding lysine increases CephC production for both strains alike. The positive effect of cadaverine was observed mainly in the Mutant 45.41 strain. Results obtained in batch-processes in a bench-scale bioreactor confirmed differences among strains observed in shaken flasks cultures. Classical mutagenesis procedures in conjunction with the adoption of well-defined criteria to establish an appropriate culture medium promoted a significant improvement in CephC production. It is the first study indicating an increase in CephC production in media containing diamines employing a mutant of S. clavuligerus obtained by classical mutagenesis
Arnosti, Lis Velosa. "Reação de trans-splicing in vitro utilizando extrato nuclear livre de células e sequencia parcial de alfa tubulina de Trypanosoma cruzi /". Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/88008.
Texto completoBanca: Marcia Aparecida da Silva Graminha
Banca: Maurício Bacci Junior
Resumo: A família Trypanosomatidae compreende um grande número de protozoários parasitas, incluindo importantes agentes etiológicos de doenças humanas. Entre os causadores de doenças, destaca-se o Trypanosoma brucei (responsável pela Doença do Sono) e o Trypanosoma cruzi (agente causador da Doença de Chagas). Ambos possuem como mecanismo de processamento dos seus mRNAs o "trans-splicing", que envolve a excisão de íntrons e a união dos éxons de dois transcritos independentes, o splice-leader, e o pré-mRNA aceptor. As reações de cis e trans-splicing in vitro com extrato nuclear de células HeLa já foram padronizadas e utilizada como modelo em diversos experimentos. Entretanto, em tripanosomas, as únicas referências sobre a reação de transsplicing in vitro são de Vianna et. al., (2001) e Skaked et. al., (2010), com extratos de parasitas preparados de modos diferentes. A reação com células permeáveis do Trypanosoma cruzi foi usada como modelo para análise de drogas tripanocidas na reação de trans-splicing (Barbosa et. al., 2007); porém, não é um sistema livre de células conforme mencionado acima. Diante disso, este trabalho propõe reproduzir a reação de "trans-splicing" in vitro com extratos nucleares livre de parasitas utilizando as formas epimastigotas de T. cruzi e/ou as formas prociclicas de T. brucei e uma sequência parcial de alfa tubulina de T. cruzi como pré-mRNA aceptor. A padronização desta reação in vitro possibilitará avanços no entendimento da maquinaria do trans-spliceossomo, tornando-se também um modelo interessante para avaliação de mecanismo de ação de drogas tripanocidas
Abstract: Trypanosomatidae family comprises a large number of protozoan parasites, including important etiological agents of neglected human diseases. Among the diseases' agents, Trypanosoma brucei (responsible for sleeping sickness) and Trypanosoma cruzi (causative agent of Chagas' disease) are the most important parasites. Both have trans-splicing as a mechanism for the processing of its mRNA, which involves the excision of introns and union of exons form two independent transcripts, the spliceleader (SLRNA), and the acceptor pre-mRNA. The reaction of cis-and transsplicing in vitro with nuclear extract of HeLa cells has already been standardized and used as a model in several experiments. However, in trypanosomes, the only references on the reaction of trans-splicing in vitro are from Vianna et. al., (2001) and Skaked et. al., (2010), using parasitefree extracts prepared on different methods. For trypanocidal drugs analyze, trans-splicing reaction using T. cruzi permeable cells was used as a model (Barbosa et. al., 2007), but this is not the same as free-cell nuclear extract as mentioned above. Thus, this work shows trans-splicing in vitro reaction using nuclear extracts either from T. cruzi epimastigote forms and/or T. brucei procyclic forms reacting with the T. cruzi alpHa-tubulin cloned sequence as pre-mRNA acceptor. The standardization of this in vitro reaction will be able to promote advances to understanding the transspliceosomo machinery, as well as occurred in mammalian cis- and/or trans-splicing, becoming also an interesting model for evaluating trypanocidal drugs interference
Mestre
Campanale, Joseph Paul. "EXPOSURE TO ULTRAVIOLET RADIATION CAUSES PROTEOMIC CHANGES IN EMBRYOS OF THE PURPLE SEA URCHIN, STRONGYLOCENTROTUS PURPURATUS". DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/142.
Texto completoAbeille, Fabien. "Automatisation et intégration d'un réacteur de culture cellulaire pour un fonctionnement en continu". Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENS036/document.
Texto completoOver the past six decades, cell culture has become a common practice. It is a major tool in biological research for the understanding of life science, such as the study of disease and the discovery of new drugs. It plays an important role in many industries since it is involved in the production of many food, cosmetic, and pharmaceutical products.However, Research and the industry are now facing some limits and are expressing needs to be addressed. They are both associated with high costs due to a large consumption of resources (cells, reagents, qualified operators). More specifically, cell culture in research is characterized by low throughput of experiments, important variability and risk of contamination due to the recurrent manual operations performed by operators. Additionally, experiments are performed in static conditions and on models (2D cultures, animals…) which poorly resemble the human physiology. Industrial cell culture needs miniaturized systems that mimic the large scale bioreactors and offer higher screening possibilities.Microfluidic cell culture systems represent a promising tool to address the aforementioned issues and needs. The change of physical behaviors at the small-scale in microfluidic devices allow controlling temporally and spatially the cell microenvironment, unattainable with conventional cell culture methods. The level of automation and integration allows the substantial increase of the number of experience per system and considerable reduction of resource consumption. Thus, many small cellular 3D architectures grown under dynamic conditions and in high-throughput have been performed and have demonstrated their ability to quickly re-create more physiological environments. Regarding the industrial culture, miniaturized cultures have already shown their ability to reproduce the characteristics of the culture observed in macrobioreactors with higher screening capabilities.In this framework, a benchtop microfluidic bioreactor, complying with the standard microfluidic platform and format used in the host laboratory, has been successfully fabricated to perform continuous cell cultures. Integrated solutions were developed to provide continuously the adequate conditions for cell proliferation (perfusion, thermal regulation…). Integrated cell harvest was also performed with the final goal to achieve long-term cell culture in the bioreactor.The fabricated system proved to guarantee sterile conditions for cell cultures on a regular lab bench. Moreover, these cultures were achieved autonomously without requiring a cumbersome incubator. In these conditions, the bioreactor demonstrated the possibility to perform continuous cell cultures of various cell types during several days: insects cells were cultured during 5 days and mammalian cells during 3 days. Regarding the mammalian cell cultures performed, a breakthrough has been achieved compared to the cultures performed in microfluidic systems since microcarriers (diam.:175 µm) were used as growth support.Although microcarrier cell culture is routinely performed in the industry, no autonomous microfluidic culture system has addressed this type of culture yet. Such a miniaturization is a major step forward for bioprocess applications where the need to develop scale-down bioreactors that mimic large scale operation has been clearly identified to shorten and reduce the costs associated to bioproduct development
Serrat, Gurrera Xavier. "Applied biotechnology to improve Mediterranean rice varieties = Biotecnologia aplicada a la millora de varietats d’arròs mediterrànies". Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396188.
Texto completoXu, Ying. "Antifouling compounds from deep-sea bacteria and their potential mode of action /". View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?BIOL%202009%20XU.
Texto completoLoggan, Briley. "Evaluating the Success of Female Selected Sex-Sorted Semen at Western Kentucky University's Dairy Farm". TopSCHOLAR®, 2019. https://digitalcommons.wku.edu/theses/3109.
Texto completoAvaca, Crusca Juliana Sposto. "Análise de interação funcional de elF5A com a tradução, repressão da tradução e degradação de mRNA em Saccharomyces cerevisiae /". Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/100736.
Texto completoCoorientador: Cleslei Fernando Zanelli
Banca: Paulo Sérgio Rodrigues Coelho
Banca: Flávio Henrique da Silva
Banca: Iran Malavazi
Banca: Carla Columbano de Oliveira
Resumo: O provável fator de início de tradução 5A (eIF5A) é altamente conservado de arqueas a mamíferos e sofre uma modificação pós-traducional única e essencial, em que uma lisina específica é convertida em um resíduo de hipusina. Este fator já foi relacionado ao transporte nucleocitoplasmático, à degradação de mRNA e à proliferação celular. Dados recentes restabelecem uma função para eIF5A na tradução e sugerem a sua atuação na etapa de elongação ao invés de início, como originalmente proposto. Uma vez que o envolvimento de eIF5A com o degradação de mRNA ainda não foi elucidado, tornou-se interessante estudar qual a natureza desta relação. O metabolismo de mRNA é um processo complexo que envolve as etapas da tradução (mRNAs nos polissomos), repressão da tradução (mRNAs acumulados em grânulos de estresse) e degradação de mRNA (mRNAs nos P bodies). Os componentes da maquinaria de degradação de mRNA acumulam-se nos P bodies e, neste trabalho, foi verificado que eIF5A não se localiza nestes corpúsculos. Ainda, foi avaliada a formação de P bodies no mutante tif51A-3, na temperatura não permissiva (38ºC), e foi verificada uma inibição na formação de P bodies. Outros mutantes com defeitos na elongação da tradução, como cca1-1 e eft2H699K, também apresentaram defeito na agregação dos P bodies. Foi avaliada a existência de interação genética sintética entre os mutantes tif51A-1 e tif51A-3 e mutantes de fatores envolvidos com a repressão da tradução e/ou degradação de mRNA. Foi revelada uma supressão parcial do fenótipo de termossensibilidade com nocautes dos genes SBP1, DHH1 e PAT1, que codificam fatores ativadores da remoção do capacete e repressores da tradução. Por outro lado, uma interação sintético doente entre os mutantes tif51A-1 e xrn1Δ foi... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The putative translation initiation factor 5A (eIF5A) is highly conserved from archaea to mammals and undergoes an unique and essential post-translational modification, in which a specific lysine residue is converted into a hypusine residue. This factor has been involved in several cellular processes such as nucleocytoplasmic transport, mRNA decay and cell proliferation. Recent data have re-established a function for eIF5A in translation and suggests a role in elongation rather than initiation as originally proposed. Since the involvement of eIF5A with mRNA decay has not been elucidated it has become interesting to study the aspects of this relationship. mRNA metabolism is a complex process that involves the steps of translation (mRNAs on the polysomes), translation repression (mRNAs accumulated in granules) and mRNA degradation (mRNAs in P bodies). The mRNA degradation machinery accumulates in P bodies and in this study we have verified that eIF5A is not localized inside them. P bodies assembly was evaluated in the tif51A-3 mutant at non-permissive temperature and this aggregation was inhibited. Other mutant strains with defects in translation elongation, such as cca1-1 e eft2H699K, also presented defective P body assembly. The existence of synthetic genetic interactions between the eIF5A mutants, tif51A-1 and tif51A-3, and translation repression and/or mRNA decay mutants was evaluated. A partial suppression of the temperature sensitive phenotype of the eIF5A mutants was revealed when SBP1, DHH1 and PAT1 genes were deleted. Since those proteins are decapping activators and translational repressors these interactions reveal a putative function for eIF5A as an inhibitor of translation repression. However, a synthetic sick phenotype between tif51A-1 and xrn1Δ mutants was observed. Finally, stress granules... (Complete abstract click electronic access below)
Doutor
Stimple, Samuel Douglas. "Recent Advances in Developing Molecular Biotechnology Tools for Metabolic Engineering and Recombinant Protein Purification". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1514494485801145.
Texto completoStefanutti, Erin. "ANGIOSTATIN LIKE PEPTIDES IN MILK: POTENTIAL DEVELOPMENT FOR DAIRY PRODUCTS CAPABLE OF CANCER PREVENTION". DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/479.
Texto completoKUMAR, ANIL. "Optimization of Transgene Expression in Chlamydomonas reinhardtii and its Biotechnological Applications". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1293558274.
Texto completoHewabostanthirige, Dhanushka. "Loss of Id4 Promotes Stemness In Prostate Cancer Cells". DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2019. http://digitalcommons.auctr.edu/cauetds/182.
Texto completoChoi, Adam. "Illuminating Biology with Membrane Penetrating Sulfonate Delivery Scaffolds and Near-Infrared Azasiline Fluorophores". eScholarship@UMMS, 2018. https://escholarship.umassmed.edu/gsbs_diss/997.
Texto completoPracheil, Tammy. "Regulation of the Target of Rapamycin Signaling Pathway in Saccharomyces cerevisiae". ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1662.
Texto completoDumaine, Jennifer. "Acute Sleep Fragmentation Induces Tissue-Specific Changes in Cytokine Gene Expression and Increases Serum Corticosterone Concentration". TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1480.
Texto completoGrosse-Holz, Friederike. "Proteases and inhibitors in the interaction between Nicotiana benthamiana and Agrobacterium tumefaciens : systematic analysis and emerging solutions for molecular farming". Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:6146918c-3749-4604-88fa-01d426e4a817.
Texto completoAntonio, Tatiana. "Obtenção de mutantes de Streptomyces clavuligerus e avaliação de condições de cultivo para a melhoria de produção de cefamicina C /". Araraquara [s.n.], 2012. http://hdl.handle.net/11449/100744.
Texto completoAbstract: Mutants were obtained by treating S. clavuligerus ATCC 27064 spores with methyl-methanesulfonate. A total of 822 colonies, obtained by successive sampling, were selected by qualitative and/or quantitative tests. The best mutant, S. clavuligerus 45.41, was two to four times more productive than the wild-type strain, and remained stable even after 35 successive samplings throughout the study. Strains behavior was investigated by adding different diamines in media, one by one, in the absence of lysine. Also investigated two different sources of C, and compounds such as 2,6-diaminopimelic acid. The two-factor (cadaverine and lysine), three-level, central composite-based, face-centered experimental design indicates that adding lysine increases CephC production for both strains alike. The positive effect of cadaverine was observed mainly in the Mutant 45.41 strain. Results obtained in batch-processes in a bench-scale bioreactor confirmed differences among strains observed in shaken flasks cultures. Classical mutagenesis procedures in conjunction with the adoption of well-defined criteria to establish an appropriate culture medium promoted a significant improvement in CephC production. It is the first study indicating an increase in CephC production in media containing diamines employing a mutant of S. clavuligerus obtained by classical mutagenesis
Orientador: Maria Lucia Gonsales da Costa Araujo
Banca: Pedro de Oliva Neto
Banca: Cecilia Laluce
Banca: José Gregório Cabrera Gomez
Banca: Cristina Paiva de Sousa
Doutor
Venter, Mauritz. "Isolation of grapevine promoters with special emphasis on the vacuolar pyrophosphatase". Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16078.
Texto completoENGLISH ABSTRACT: Understanding the complex nature of grapevine molecular biology is of great importance for viticulturists. Progress in the elucidation of key events on a genetic level could provide further insight into the underlying cues responsible for the precise control of physiological and metabolic changes during a specific condition such as fruit development. The use and analysis of molecular ‘tools’, such as promoters controlling the site and level of gene activity, could assist in the understanding of grapevine biology and serve as a platform for the future design and development of recombinant DNA protocols and strategies for Vitis vinifera L. A high-throughput gene expression system, cDNA-AFLPs, was successfully used to analyse large-scale transcriptional activity during berry ripening. Candidate cDNA fragments were selected on the basis of desired expression patterns and/or known gene function for subsequent promoter isolation. From three candidate cDNAs selected, the promoter of a gene encoding vacuolar pyrophosphatase (V-PPase) was isolated for computational and comparative analyses. Promoter activity was evaluated on a transient level using the green fluorescent protein (GFP) reporter gene. Comparative integration has allowed for putative correlation of cis-elements, acting as receptors within promoter regions, to regulate V-PPase gene expression in response to development, environmental stress and tissue-specificity. In this study, integration of genetic data have advanced the understanding and transcriptional role of a key enzyme (V-PPase) during grape ripening. Although never a replacement for experimental verification, this integrative strategy of combining gene expression profiles with bioinformatics and regulatory data will greatly assist in further elucidation of various other key components and regulatory cues associated with grapevine molecular biology. This study has allowed us to use molecular tools that could assist in gaining further insight into genetic complexities and could serve as a platform for a more refined genetic manipulation strategy in Vitis vinifera L.
AFRIKAANSE OPSOMMING: Begrip van die komplekse aard van wingerd molekulêre biologie is van groot belang vir wingerdkundiges. Vooruitgang in die begrip van belangrike gebeurtenisse op ń genetiese vlak behoort verdere insig in die onderliggende instruksies vir die noukeurige beheer van fisiologiese en metaboliese veranderinge tydens ń spesifieke kondisie soos vrug rypwording te bevorder. Die gebruik en analise van molekulêre ‘instrumente’ soos promoters, wat die posisie en vlak van geen aktiwiteit beheer, kan bydra tot n beter begrip van wingerd biologie en sodoende dien as ń platform vir die toekomstige ontwerp en ontwikkeling van rekombinante DNS (deoksiribonukleiensuur) protokolle en strategieë vir Vitis vinifera L. ń Hoë-kapasiteit geen uitdrukkings sisteem, nl. kDNS-AFLPs (komplementêre deoksiribonukleiensuur- geamplifiseerde fragment lengte polimorfisme), is suksesvol gebruik vir die analise van grootskaalse transkripsionele aktiwiteit tydens druif rypwording. Kandidaat kDNS fragmente is geselekteer, gebaseer op verlangde uitdrukkings-patrone en/of bekende geen funksie vir daaropvolgende promoter isolering. Van drie geselekteerde kandidaat kDNS fragmente, is die promoter van ń geen wat vakuolêre pirofosfatase (V-PPase) kodeer geïsoleer vir rekenaar- en vergelykende analise. Promoter aktiwiteit is op ń nie-stabiele vlak deur die gebruik van ń groen-fluoresserende proteien (GFP) verklikker geen geëvalueer. Vergelykende integrering het dit moontlik gemaak om veronderstelde korrelasies van cis-elemente, wat as reseptore binne ń promoter area dien, en die regulering van V-PPase geen uitdrukking, in reaksie tot ontwikkeling, omgewings stres en weefsel-spesifisiteit, te maak. Tydens hierdie studie, het die integrering van genetiese data gehelp om die transkripsionele rol van ń belangrike ensiem (V-PPase) tydens druif rypwording beter te verstaan. Alhoewel dit nooit ń plaasvervanger vir eksperimentele bewyse sal wees nie, kan hierdie gëintegreerde strategie, wat die kombinasie van geen-uitdrukkingsprofiele met bioinformatika en regulatoriese data behels, grootliks bydra om verskeie ander belangrike komponente en regulatorieseaanwysings geassosieërd met wingerd molekulêre biologie te ontrafel. Hierdie studie het verdere insig in genetiese kompleksiteite verleen, en kan nou dien as ń platform vir ń meer presiese genetiese manipulering strategie in Vitis vinifera L.
Agarwal, Stuti. "Pemetrexed, A Modulator of AMP-activated Kinase Signaling and an Inhibitor of Wild type and Mutant p53". VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/4003.
Texto completoSilva, Natan Versati da. "Produção e estudo de atividade antiangiogênica de proteínas de fusão endostatina-domínio BH3 das proteínas pró-apoptóticas PUMA e BIM". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-23032016-155417/.
Texto completoEndostatin (ES) is an angiogenesis inhibitor protein, with specific effect on proliferating endothelial cells, used to treat solid tumors. However, the high antitumor effect observed in animals is not reproduced in humans. In order to enhance the therapeutic efficacy of ES, we produced two hybrid proteins with two functional domains. The first domain is the ES that is specific for activated endothelial cells, directing the fusion proteins to endothelial cells in proliferation, promoting the internalization and the inhibitory effect. As a second functional domain we used the pro-apoptotic BH3 domains of two BH3-only proteins in order to promote the release of cytochrome C and trigger the apoptosis process, increasing the ES antiangiogenic action. In this work, we produced two fusion proteins containing the BH3 domain of the potent pro-apoptotic proteins BIM and PUMA (PUMA-ES and ES-BIM), which should provide enhanced antiangiogenic effect in relation to ES. The insertion of DNA fragments coding for the BH3 domain and PUMA and BIM in a vector containing ES gene (pETES) was accomplished by site-directed mutagenesis. These recombinant fusion proteins were expressed as inclusion bodies in E. coli, refolded using process at high pressure and purified on heparin affinity resin. Treatment of endothelial cells with ES-PUMA and ES-BIM did not lead to loss in viability in MTS assay or increase of apoptosis evaluated by flow cytometry, in comparison with the results obtained by treatment with ES.
Halle, Briana. "Production of a Cost-Effective, TMV-Based Rabies Vaccine through Recombinant DNA Technology". Scholarship @ Claremont, 2018. http://scholarship.claremont.edu/cmc_theses/1816.
Texto completoJackson, Constanza. "Synthesis of 2’ Modified Primers to Characterize Extension Events by Mutant Taq DNA Polymerases". Scholarship @ Claremont, 2015. http://scholarship.claremont.edu/scripps_theses/592.
Texto completoHussain, Shahed. "The development of novel biocatalytic routes for the synthesis of enantiomerically-pure chiral amines". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/the-development-of-novel-biocatalytic-routes-for-the-synthesis-of-enantiomericallypure-chiral-amines(eba89b88-6801-40cc-a3c3-9c5f1c518d0f).html.
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