Relevant bibliographies by topics / Extrinsic proteins

Academic literature on the topic 'Extrinsic proteins'

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Published: 4 June 2021
Last updated: 30 January 2023

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Journal articles on the topic "Extrinsic proteins"

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Ohta, Hisataka, Takehiro Suzuki, Masaji Ueno, Akinori Okumura, Shizue Yoshihara, Jian-Ren Shen, and Isao Enami. "Extrinsic proteins of photosystem II." European Journal of Biochemistry 270, no. 20 (September 26, 2003): 4156–63. http://dx.doi.org/10.1046/j.1432-1033.2003.03810.x.

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Nagao, Ryo, Hanayo Ueoka-Nakanishi, Chihiro Uno, Tatsuya Tomo, and Takumi Noguchi. "1P255 FTIR study on the functions of the extrinsic proteins in cyanobacterial photosystem II: Evolutionary aspect of extrinsic proteins(18B. Photobiology: Photosynthesis,Poster)." Seibutsu Butsuri 53, supplement1-2 (2013): S148. http://dx.doi.org/10.2142/biophys.53.s148_2.

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Bricker, Terry M., Johnna L. Roose, Robert D. Fagerlund, Laurie K. Frankel, and Julian J. Eaton-Rye. "The extrinsic proteins of Photosystem II." Biochimica et Biophysica Acta (BBA) - Bioenergetics 1817, no. 1 (January 2012): 121–42. http://dx.doi.org/10.1016/j.bbabio.2011.07.006.

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Roose, Johnna L., Kimberly M. Wegener, and Himadri B. Pakrasi. "The extrinsic proteins of Photosystem II." Photosynthesis Research 92, no. 3 (January 3, 2007): 369–87. http://dx.doi.org/10.1007/s11120-006-9117-1.

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Tamura, Noriaki, Richard Radmer, Steve Lantz, Kirk Cammarata, and George Cheniae. "Depletion of Photosystem II-extrinsic proteins." Biochimica et Biophysica Acta (BBA) - Bioenergetics 850, no. 2 (July 1986): 369–79. http://dx.doi.org/10.1016/0005-2728(86)90193-3.

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Roose, Johnna L., Laurie K. Frankel, Manjula P. Mummadisetti, and Terry M. Bricker. "The extrinsic proteins of photosystem II: update." Planta 243, no. 4 (January 12, 2016): 889–908. http://dx.doi.org/10.1007/s00425-015-2462-6.

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Burnap, R. L. "Mass spectroscopy locates the extrinsic proteins of photosystem II." Proceedings of the National Academy of Sciences 111, no. 12 (March 14, 2014): 4359–60. http://dx.doi.org/10.1073/pnas.1402022111.

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Murata, Norio, and Mitsue Miyao. "Extrinsic membrane proteins in the photosynthetic oxygen-evolving complex." Trends in Biochemical Sciences 10, no. 3 (March 1985): 122–24. http://dx.doi.org/10.1016/0968-0004(85)90272-5.

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Yi, Xiaoping, Myriam McChargue, Susan Laborde, Laurie K. Frankel, and Terry M. Bricker. "The Manganese-stabilizing Protein Is Required for Photosystem II Assembly/Stability and Photoautotrophy in Higher Plants." Journal of Biological Chemistry 280, no. 16 (February 18, 2005): 16170–74. http://dx.doi.org/10.1074/jbc.m501550200.

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Interfering RNA was used to suppress the expression of two genes that encode the manganese-stabilizing protein of photosystem II inArabidopsis thaliana, MSP-1 (encoded bypsbO-1, At5g66570), and MSP-2 (encoded bypsbO-2, At3g50820). A phenotypic series of transgenic plants was recovered that expressed high, intermediate, and low amounts of these two manganese-stabilizing proteins. Chlorophyll fluorescence induction and decay analyses were performed. Decreasing amounts of expressed protein led to the progressive loss of variable fluorescence and a marked decrease in the fluorescence quantum yield (Fv/Fm) in both the absence and the presence of dichloromethylurea. This result indicated that the amount of functional photosystem II reaction centers was compromised in the plants that exhibited intermediate and low amounts of the manganese-stabilizing proteins. An analysis of the decay of the variable fluorescence in the presence of dichlorophenyldimethylurea indicated that charge recombination between QA–and the S2state of the oxygen-evolving complex was seriously retarded in the plants that expressed low amounts of the manganesestabilizing proteins. This may have indicated a stabilization of the S2state in the absence of the extrinsic component. Immunological analysis of the photosystem II protein complement indicated that significant losses of the CP47, CP43, and D1 proteins occurred upon the loss of the manganese-stabilizing proteins. This indicated that these extrinsic proteins were required for photosystem II core assembly/stability. Additionally, although the quantity of the 24-kDa extrinsic protein was only modestly affected by the loss of the manganese-stabilizing proteins, the 17-kDa extrinsic protein dramatically decreased. The control proteins ribulose bisphosphate carboxylase and cytochromefwere not affected by the loss of the manganese-stabilizing proteins; the photosystem I PsaB protein, however, was significantly reduced in the low expressing transgenic plants. Finally, it was determined that the transgenic plants that expressed low amounts of the manganese-stabilizing proteins could not grow photoautotrophically.
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Putcha, Girish V., Charles A. Harris, Krista L. Moulder, Rachael M. Easton, Craig B. Thompson, and Eugene M. Johnson. "Intrinsic and extrinsic pathway signaling during neuronal apoptosis." Journal of Cell Biology 157, no. 3 (April 29, 2002): 441–53. http://dx.doi.org/10.1083/jcb.200110108.

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Trophic factor deprivation (TFD)-induced apoptosis in sympathetic neurons requires macromolecular synthesis–dependent BAX translocation, cytochrome c (cyt c) release, and caspase activation. Here, we report the contributions of other intrinsic and extrinsic pathway signals to these processes. Sympathetic neurons expressed all antiapoptotic BCL-2 proteins examined, yet expressed only certain BH3-only and multidomain proapoptotic BCL-2 family members. All coexpressed proapoptotic proteins did not, however, exhibit functional redundancy or compensatory expression, at least in the Bax−/−, Bak−/−, Bim−/−, Bid−/−, and Bad−/− neurons examined. Although the subcellular distribution or posttranslational modification of certain BCL-2 proteins changed with TFD, neither transcriptional nor posttranslational mechanisms regulated the expression or subcellular localization of BID, BAD, or BAK in this paradigm. Despite modest induction of Fas and FasL expression, Fas-mediated signaling did not contribute to TFD-induced apoptosis in sympathetic neurons. Similar findings were obtained with K+ withdrawal–induced apoptosis in cerebellar granule neurons, a model for activity-dependent neuronal survival in the CNS. Thus, expression alone does not guarantee functional redundancy (or compensation) among BCL-2 family members, and, at least in some cells, extrinsic pathway signaling and certain BH3-only proteins (i.e., BID and BAD) do not contribute to BAX-dependent cyt c release or apoptosis caused by TFD.
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Dissertations / Theses on the topic "Extrinsic proteins"

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Shutova, Tatiana. "Photosynthetic water oxidation : the function of two extrinsic proteins." Doctoral thesis, Umeå : Department of Plant Physiology, Umeå Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1476.

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George, Sarah M. A. "Proteins as allergens : intrinsic and extrinsic factors that influence immune responses." Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445683.

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Niland, Hannah. "Detection and analysis of proteins in the solid phase using extrinsic and intrinsic fluorescence." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28771.

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Over the past two decades a body of evidence concerning residual biological contamination on cleaned surgical instruments has accumulated. This is substantiated by the number of yearly surgery cancellations due to visible residue on instruments in surgical packs and incidences of iatrogenic Creutzfeldt-Jakob disease (iCJD). It is therefore imperative to develop a method of protein detection for use in clinical sterile services departments (SSDs) for monitoring of decontamination quality. This Thesis describes the development and use of an epifluorescence surface scanner (EFScan) technology in the assessment of proteinaceous residue on surgical instruments, by detecting protein pre-labelled with fluorescein isothiocyanate (FITC), and exploratory studies on the feasibility of label-free detection, using intrinsic protein fluorescence. Measurements using FITC labelling showed that residual protein on the order of micrograms can be found on new, single-use instruments (i.e. prior to use). This is comparable to the amount of residual protein found on retired, reusable instruments. To confirm the suitability of fluorescence techniques in the detection and quantification of proteinaceous residue, a blind, pilot study was carried out in conjunction with groups from Queen Mary University and the University of Southampton. Each University used a different labelling and detection method, and results showed good agreement between these methods. This showed that fluorescence is a suitable technique for the detection and quantification of proteinaceous contamination on surgical instruments. The next step in the project focussed on detection of contamination via intrinsic protein fluorescence from tryptophan residues, with a view to elimination of the labelling step. Intrinsic fluorescence of proteins in solution is widely characterised; however, fluorescence characteristics of solid or surface-bound protein have been little studied. Therefore, the characterisation of solid protein fluorescence and the emission characteristics of protein adsorbed onto stainless steel was undertaken. Analysis of the commonly used protein standard bovine serum albumin (BSA) showed that the two tryptophan residues it contains are highly susceptible to photo-oxidation in the solid state, resulting in conversion to the fluorescent photoproducts n-formylkynurenine (NFK) and kynurenine. Therefore, BSA is not suitable for use as a standard in the development of intrinsic fluorescence detection of surface-bound protein. The 72-tryptophan protein fibrinogen, as well as a series of other multi-tryptophan proteins, were assessed and it was found that photo-oxidation of the tryptophan residues did not occur on the irradiation timescale of 1 hour utilized. Therefore, it was concluded that lysozyme or gamma-globulins, a prominent group of serum proteins, would be more suitable candidates as a standard in subsequent research into the intrinsic detection and quantification of proteinaceous contamination. A third study explored the potential use of fluorescence in the early diagnosis of cataract. This involved the fluorescence characterisation of healthy porcine lenses and the use of UV irradiation of the lens to attempt to create cataract in vitro. There was found to be a large variation in fluorescence characteristics from lens to lens, suggesting that fluorophore concentrations can vary significantly. This implies that identification of a suitable standard for the early detection of cataract may be problematic. Attempts to create cataract resulted in the photo-oxidation pathway which had been observed in BSA, and although NFK and kynurenine play a role in cataractogenesis, the accumulation of these photoproducts is not analogous to a natural cataract. It was found that these products could be destroyed by irradiation of the lens at appropriate photo-bleaching wavelengths. However, this also destroyed intrinsic, protective fluorophores within the lens, suggesting that a light-based method of cataract treatment may not be achievable.
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Clément, Flora. "Regulating human mammary epithelial stem cells transformation : an interplay between extrinsic and intrinsic signals." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1078.

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L'incidence, le coût et l'issue fatale dans un nombre encore trop élevé de cas font du cancer un problème majeur en santé publique. Malgré les progrès réalisés dans le développement de thérapies ciblées, la plupart des cancers rechutent, vraisemblablement à cause de l'échappement des cellules souches cancéreuses (CSC) qui survivent et régénèrent la tumeur. L'enjeu clinique en cancérologie aujourd'hui est d'éliminer les cellules souches cancéreuses en épargnant les cellules souches normales. Pour atteindre cet objectif, il est primordial de comprendre leurs mécanismes spécifiques de transformation. Nous évaluons dans mon équipe de recherche l'implication du microenvironnement dans la transformation et la résistance des CSC épithéliales, à travers les effets de facteurs solubles et de contacts cellulaires : l'enzyme CD10, et la voie des BMPs (Bone Morphogenetic Proteins).Notre équipe étudie le rôle du dialogue permanent entre la CS normale et son microenvironnement qui régule la prolifération, et la survie des CS. Nous utilisons la glande mammaire et la prostate comme systèmes modèles car ces deux types d'épithélium présentent des similitudes, ce qui nous permet d'aborder la question de l'apparition et la résistance des CSC dans deux modèles tumoraux correspondants. Des dérégulations de la voie des BMPs, comme de l'enzyme CD10 sont observées dans ces tumeurs. Enfin, nous cherchons à comprendre comment les dérégulations de la voie des BMPs apparaissent, en s'intéressant principalement aux facteurs pouvant modifier directement le microenvironnement, tels que les polluants présents dans l'environnement (bisphénols, benzoapyrène)
It has been shown for a number of cancers that a cell population characterized by stem cell (SC) properties and therapeutic resistance is likely responsible for relapse several years after treatment. Current therapies kill most of the tumor cells, but fail to eradicate the so-called cancer stem cells (CSC). Therefore a complete cure of the disease will require the eradication of the tumor-sustaining CSC. We propose to study these CSC in the context of breast cancer as the existence of CSC as already been highlighted in this epithelia.CD10 is a membrane enzyme able to cleave several peptide of the microenvironment (such as oxytocin, bombesin, enkephalin.. ) that can also interact with intracellular signalling pathway through its direct interaction with PTEN. Our results, and those of the literature, indicate that CD10 enzyme controls the fate of SC and is deregulated in normal breast and cancerous tissues. We showed that CD10 membrane expression allows the maintenance of immature cells partly through its enzymatic function that inhibits mammary stem cells differentiation. As CD10 has been described in breast cancer initiation, progression and resistance, we then decided to test the role of CD10 in tumor context. Our strategy consists in flow cytometry cell sorting for CD10+/CD10- cells to compare the functional properties of both sub-population. Only CD10+ cells are able to regenerate both CD10+ and CD10- subpopulations, and CD10+ cells exhibit higher expression of immature genes. Interestingly, modulating CD10 using stable expression of CD10 in our models and Sh strategies do not mimick the normal functions of CD10, indicating that CD10 could be more a marker of a certain population with immature properties prone to transformation rather than a driver. To better characterize the role of CD10 in luminal breast transformation, we developed a new human mammary model, initiated from immature cells to obtain transformed luminal epithelial cells and their resistant counterpart. We observed a higher level of CD10 expression during mammary epithelial cell transformation process. We then performed a microarray on CD10+ and CD10- subpopulations. Preliminary analysis seems to confirm that CD10 is a potential marker for a stem cell population prone to transformation rather than a direct driver of the cell transformation
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Säkkinen, H. (Hannele). "Variation in the blood chemical constituents of reindeer:significance of season, nutrition and other extrinsic and intrinsic factors." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514277732.

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Abstract Reindeer management in the Fennoscandian area is currently facing challenges such as degradation of winter pastures, which may lead in the most severely affected areas to a concurrent decline in reindeer herd productivity. The use of often expensive supplementary feeding to prevent production losses has increased the demand for studies on the physiological effects of nutritional restriction and supplementary feeding. The knowledge obtained from such studies could be used, for example, to monitor the condition of reindeer in studies assessing herd productivity levels in different pasture conditions and management systems or sustainable use of pasture resources. In this thesis, the effects of season, year, pasture area, body mass, pregnancy and other extrinsic and intrinsic factors on the variation of blood chemical constituents of reindeer were studied in free-ranging animals under natural foraging conditions. The studied blood chemical constituents covered a wide range of parameters related to protein, carbohydrate, lipid and mineral metabolism. The same blood chemical constituents were studied in captive reindeer under defined feeding conditions, allowing an analysis of the effects of dietary protein, energy and mineral intake on the selected blood constituents and their comparison to a conventional measure of the animals' condition, live body mass. According to the results, free-ranging reindeer showed great variation in the concentrations of blood chemical constituents compared to the reference values of domesticated ruminants. Intrinsic factors such as body mass, pregnancy and age had only a minor influence on the variation of the studied parameters, whereas extrinsic factors such as season, year and pasture area, which were characterized by marked changes in environmental and nutritional conditions, explained the majority of the variation. The results obtained from captive animals in defined feeding conditions and from free-ranging animals foraging on natural pastures led to the conclusion that blood total proteins, albumin, urea, creatinine, urea:creatinine ratio, magnesium, inorganic phosphate and, to a lesser extent, globulins and albumin:globulin ratio responded to the changes in feed quality and availability and were the most suitable blood constituents to be used as nutritional biomarkers for reindeer.
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Hendry, Garth S., and Garth Hendry@baldwins com. "Dependence of substrate-water binding on protein and inorganic cofactors of photosystem II." The Australian National University. Research School of Biological Sciences, 2002. http://thesis.anu.edu.au./public/adt-ANU20041124.140348.

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The photosynthetic water oxidation reaction is catalyzed by an inorganic Mn4OxCaClyHCO3-z cluster at the heart of the oxygen evolving complex (OEC) in photosystem II. In the absence of an atomic resolution crystal structure, the precise molecular organization of the OEC remains unresolved. Accordingly, the role of the protein and inorganic cofactors of PSII (Ca2+, HCO3- and Cl-) in the mechanism of O2-evolution await clarification. In this study, rapid 18O-isotope exchange measurements were applied to monitor the substrate-water binding kinetics as a function of the intermediate S-states of the catalytic site (i.e. S3, S2 and S1) in Triton X-100 solubilized membrane preparations that are enriched in photosystem II activity and are routinely used to evaluate cofactor requirements. Consistent with the previous determinations of the 18O exchange behavior in thylakoids, the initial 18O exchange measurements of native PSII membranes at m/e = 34 (which is sensitive to the 16O18O product) show that the ‘fast’ and ‘slowly’ exchanging substrate-waters are bound to the catalytic site in the S3 state, immediately prior to O2 release. Although the slowly exchanging water is bound throughout the entire S-state cycle, the kinetics of the fast exchanging water remains too fast in the S2, S1 [and S0] states to be resolved using the current instrumentation, and left open the possibility that the second substrate-water only binds to the active site after the formation of the S3 state. Presented is the first direct evidence to show that fast exchanging water is already bound to the OEC in the S2 state. Rapid 18O-isotope exchange measurements for Ex-depleted PSII (depleted of the 17- and 23-kDa extrinsic proteins) in the S2 state reveals a resolvable fast kinetic component of 34k2 = 120 ± 14 s-1. The slowing down of the fast phase kinetics is discussed in terms of increased water permeation and the effect on the local dielectric following removal of the extrinsic subunits. In addition, the first direct evidence to show the involvement of calcium in substrate-water binding is also presented. Strontium replacement of the OEC Ca2+-site reveals a factor of ~3-4 increase in the 18O exchange of the slowly exchanging water across the S3, S2 and S1 states while the kinetics of the fast exchanging water remain unchanged. Finally, a re-investigation of the proposed role for bicarbonate as an oxidizable electron donor to photosystem II was unable to discern any 18O enrichment of the photosynthetically evolved O2 in the presence of 18O-bicarbonate. A working model for O2-evolution in terms of these results is presented.
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Lubelski, Ryan Edward. "Effect Of Metals And Cetylpyridinium Chloride On Tannin-Protein Interactions: Potential Roles In Extrinsic Teeth Stain Formation." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1574705098076537.

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Beard, Martin Gale. "The impact of intrinsic and extrinsic factors on the safety and quality of hard and semi-soft natural cheese." Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1422.

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KITZBERGER, František. "Preparation and initial NMR study of two extrinsic proteins in photosystem II." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-393333.

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KOHOUTOVÁ, Jaroslava. "Structural analysis of extrinsic proteins from the oxygen-evolving complex of photosystem II from higher plants." Doctoral thesis, 2010. http://www.nusl.cz/ntk/nusl-52550.

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All life on earth depends mainly on the presence of oxygen. Largest producers of oxygen are green plants, cyanobacteria and algae. Oxygen is released from the oxygenevolving complex of photosystem II during photosynthesis and it is used in cellular respiration of all life complexes. The oxygen-evolving complex of photosystem II has the same function in each photosynthetic organism, but it has a different composition and organization of extrinsic proteins; only PsbO protein is ubiquitous in all known oxyphototrophs. Until now only low resolution electron microscopy structural models of plant PSII and crystal structures of cyanobacterial PSII are available. Higher plant extrinsic proteins (PsbP, PsbQ and PsbR) are structurally unrelated, non-homologues to the cyanobacterial extrinsic proteins (PsbO, PsbU and PsbV) and this is the reason why it is not possible to predict arrangement of these proteins on the lumenal site of higher plant PSII. Recently, models differ mainly in the structure of the oxygen-evolving complex, which could be resolved by determination of the exact binding sites for extrinsic proteins. An other question evolves: if the difference in the oxygen-evolving complex composition is the result of evolution or adaptation of photosynthetic organisms to their environment. Structural knowledge of extrinsic proteins that could help to resolve the location and subsequently the function of extrinsic proteins is still incomplete. From this case,structural analysis, interactions and probably arrangement of proteins PsbP and PsbQ was studied and is described in detail in this thesis.
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Book chapters on the topic "Extrinsic proteins"

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Tjus, Staffan, and Bertil Andersson. "Extrinsic Membrane Proteins of Photosystem I." In Current Research in Photosynthesis, 1543–46. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_354.

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Rosenberg, Mark F., Toby D. Flint, Fiona H. Shepherd, Andreas Holzenburg, and Robert C. Ford. "Localization of the Extrinsic Proteins of Photosystem II by Electron Microscopy." In Photosynthesis: from Light to Biosphere, 2309–12. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_544.

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Okumura, Akinori, Katsuyoshi Nakazato, Satoshi Yamagoe, Ryo Nagao, Takehiro Suzuki, Masako Iwai, and Isao Enami. "Cloning and Sequence Analyses of Five Extrinsic Proteins in Diatom PSII." In Photosynthesis. Energy from the Sun, 475–78. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6709-9_107.

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Miura, Taro, Seitaro Takahashi, Masaharu Kamo, Eriko Nakamura, Hisataka Ohta, Yasunori Inoue, and Isao Enami. "Amino Acid Residues of the Extrinsic 33 kDa Protein Involved in Electrostatic Interaction with Intrinsic Proteins of PS II." In Photosynthesis: from Light to Biosphere, 1331–34. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_313.

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Enami, Isao, Shizue Yoshihara, Hisataka Ohta, and Jian-Ren Shen. "Cross-Reconstitution of Four Extrinsic Proteins From a Red Alga with Higher Plant and Cyanobacterial PSII." In Photosynthesis: Mechanisms and Effects, 1435–38. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_339.

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Bricker, Terry M., and Laurie K. Frankel. "Characterization of Monoclonal Antibodies Which Recognize the 33, 24, and 17 kDa Extrinsic Proteins of Photosystem II." In Current Research in Photosynthesis, 825–28. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_190.

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Ohta, Hisataka, Akinori Okumura, Takara Katoh, Jian-Ren Shen, Masaharu Kamo, and Isao Enami. "Cloning and Expression of Genes Encoding A 12 kDa Protein and Cytochrome c550, Two Extrinsic Proteins of PS II, from Ared Alga Cyanidium Caldarium." In Photosynthesis: Mechanisms and Effects, 2979–82. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_699.

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Bentley, Fiona K., and Julian J. Eaton-Rye. "The Effect of Removing Photosystem II Extrinsic Proteins on Dimer Formation and Recovery from Photodamage in Synechocystis sp. PCC 6803." In Photosynthesis. Energy from the Sun, 715–17. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6709-9_159.

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Matsubayashi, Tohru, and Masahiro Sugiura. "Isolation and Characterization of Extrinsic and Intrinsic Thylakoid Membrane Proteins from Tobacco Chloroplasts: Where is the NADH Dehydrogenase Components in Chloroplasts?" In Research in Photosynthesis, 343–46. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-009-0383-8_77.

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Chen, Changguo, and G. M. Cheniae. "High Affinity Binding of the Ca2+ Essential for 02 Evolution is Dependent on the Existence of the Mn-Cluster but is Independent of the Extrinsic Proteins." In Photosynthesis: from Light to Biosphere, 1307–10. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_307.

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Conference papers on the topic "Extrinsic proteins"

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Kang, Zhigang, and Liang Cao. "Abstract 254: Genome-wide shRNA screening identifies candidate proteins modulating the extrinsic apoptotic pathway." In Proceedings: AACR 103rd Annual Meeting 2012‐‐ Mar 31‐Apr 4, 2012; Chicago, IL. American Association for Cancer Research, 2012. http://dx.doi.org/10.1158/1538-7445.am2012-254.

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Athamneh, Ahmad, and Justin Barone. "Enzyme-Mediated Self-Assembly of Highly Ordered Structures From Disordered Proteins." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-540.

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Trypsin hydrolysis of wheat gluten produced glutamine-rich short peptides with a tendency to self-assemble into supermolecular structures extrinsic to native wheat gluten. Fourier transform infrared and X-ray diffraction data suggested that the new structures formed resembled that of cross-β amyloid fibrils found in some insect silk and implicated in prion diseases. The superstructures were about 10 μm in diameter with clear right-handed helical configuration and appeared to be bundles of smaller fibrils of about 63 nm in diameter. Results demonstrate the potential for utilizing cheap protein sources and natural mechanisms of protein self-assembly to design advanced nanomaterials that can provide a wide range of structural and chemical functionality.
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Brass, L. F., D. R. Manning, and M. J. Woolkalis. "G PROTEIN REGULATORS OF PHOSPHOLIPASE C AND ADENYLATE CYCLASE IN PLATELETS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644630.

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The hydrolysis of polyphosphoinositides (PI) by phospholipase C during platelet activation produces two key intracellular messengers, inositol triphosphate and diacylglycerol. This process is thought to be regulated by a guanine nucleotide binding protein referred to as Gp. Although the evidence that Gp exists is compelling, to date it has not been isolated. Uncertainty about its identity has been compounded by variations between tissues in the susceptibility of Gp to pertussis toxin and by reconstitution studies which show that pertussis toxin-inhibited PI hydrolysis can be restored by purified Gi, the pertussis toxin-sensitive G protein which inhibits adenylate cyclase. Therefore, it remains unclear whether Gp represents a new G protein or a second role for Gj. When platelets permeabilized with saponin were incubated with pertussis toxin and 32P-NAD, a single 42 kDa protein was 32P-ADP-ribosylated which co-migrated with the purified a subunit of Gi. Preincubating the platelets with an agonist inhibited labeling of this protein by dissociating the G protein into subunits. The extent of inhibition correlated with the number of toxin-sensitive functions caused by the agonist. Labeling was abolished by thrombin, which inhibited cAMP formation and caused toxin-inhibitable PI hydrolysis. Labeling was partially inhibited by vasopressin and platelet activating factor, which caused toxin-inhibitable PI hydrolysis, but had no effect on cAMP formation and by epinephrine, which inhibited cAMP formation, but did not cause PI hydrolysis. Labeling was unaffected by the TxA2 analog U46619, which neither caused toxin-sensitive PI hydrolysis nor inhibited cAMP formation. These observations suggest that the 42 kDa band may contain a subunits from both Gp and Gi and, in fact, 2D electrophoresis resolved the 42 kDa protein band into two proteins with distinct pi. However, those agonists linked functionally only to Gp or only to Gi decreased the labeling of both proteins. Therefore, our data suggest (1) that Gj and Gp are the same protein and (2) that whether a aiven platelet agonist affects adenylate cyclase or phospholipase C or both depends upon factors extrinsic to the G protein.
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Dixon, J. Brandon, Ryan Akin, Mike Weiler, and Timothy Kassis. "Non-Invasive Assessment of Lymphatic Pumping Pressure in a Rat Tail Model Utilizing Near-Infrared Imaging." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14416.

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The lymphatic vasculature consists of a network of vessels that promote unidirectional transport of fluid, proteins, and cells from the interstitium back into the blood, providing functions essential for maintaining fluid balance, immune cell trafficking, and lipid absorption from the intestine. The lymphatics generate flow through both extrinsic pumping mechanisms, such as contraction of surrounding skeletal muscle, and through the intrinsic contractility of each lymphatic vessel unit known as a lymphangion. Specialized lymphatic muscle, working in coordination with uni-directional valves separating each lymphangion, serves to contract up to 80% of the vessel diameter and drive flow from the interstitium back to the venous circulation.
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Vogt, William C., and Christopher G. Rylander. "Effects of Tissue Dehydration on Optical Diffuse Reflectance and Transmittance in Ex Vivo Porcine Skin." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80935.

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Soft tissues are heterogeneous materials that may be considered mixtures of water, proteins, and cells. The high degree of mismatch in refractive index between these constituents causes tissues to be highly turbid media [1]. Mechanical optical clearing is a technique for reducing tissue scattering and improving light-based diagnostics and therapeutics. Mechanical optical clearing is performed using indentation to locally modify tissue optical response, and this effect has been shown to be reversible in vivo [2]. This effect is attributed to transient changes in tissue water distribution as a result of interstitial pore flow of water due to tissue compression. This leads to the hypothesis that tissue optical response is also correlated to the tissue’s state of hydration. The goal of this study was to investigate whether or not a difference in tissue water content produces a measurable difference in tissue optical response and to correlate that response with mechanical deformation. Both diffuse reflectance and transmittance were selected as extrinsic optical signals of interest.
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Jamalian, Samira, Christopher D. Bertram, and James E. Moore. "Initial Steps Toward Development of a Lumped-Parameter Model of the Lymphatic Network." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14823.

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One of the primary functions of the lymphatic system is maintaining fluid and protein balance in the body. The system holds this balance by collecting about four liters of fluid every day from the interstitial space and returning it back to the subclavian vein. In contrast to the blood circulation system that relies on the heart for pumping, there is no central pump in the lymphatic system. Thus, the transport of viscous fluid against gravity and pressure difference occurs by recruiting extrinsic and intrinsic pumping mechanisms. Extrinsic pumping is the transport of lymph due to the movements outside the lymphatic vessel such as the pulse in blood vessels, whereas the intrinsic pumping is transport of lymph by contraction of lymphatic muscle cells embedded in the walls of lymphatic vessels. Similar to the veins, the bi-leaflet valves throughout the lymphatic network prevent backflow. Lymphatic valves are biased open and allow for small amounts of back flow before they completely shut.
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Rahbar, Elaheh, Beth A. Placette, and James E. Moore. "Modeling of Lymphatic Contractility." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19604.

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The lymphatic system is responsible for maintaining fluid and protein homeostasis, collecting approximately 4 liters of interstitial fluid per day and returning it to the venous system. Transporting this fluid, however, is no trivial task. Given that the point of return is located in the upper torso, most of the body’s lymph is pumped “uphill”. Furthermore, tissue pressures are very low, no higher than 15 mmHg, suggesting that lymph flow is not solely pressure driven. In fact, lymphatic vessels rely on intrinsic and extrinsic pumping mechanisms to propel lymph.
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Chen, Zhi-Hua, Hilaire C. Lam, Hong Pyo Kim, Stefan W. Ryter, and Augustine M. K. Choi. "Autophagic Protein LC3B Regulates Cigarette Smoke-Induced Extrinsic Apoptosis in Chronic Obstructive Pulmonary Disease." In American Thoracic Society 2010 International Conference, May 14-19, 2010 • New Orleans. American Thoracic Society, 2010. http://dx.doi.org/10.1164/ajrccm-conference.2010.181.1_meetingabstracts.a2918.

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Fang, Hua, and Yves A. DeClerck. "Abstract 518: Plasminogen activator inhibitor-1 (PAI-1) protects tumor cells from extrinsic apoptosis." In Proceedings: AACR 101st Annual Meeting 2010‐‐ Apr 17‐21, 2010; Washington, DC. American Association for Cancer Research, 2010. http://dx.doi.org/10.1158/1538-7445.am10-518.

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Andersson, T. R., H. Bell, P. M. Sandset, O. R. Ødegaard, and L.-M. Aamodt. "“NEW” COAGULATION INHIBITORS LEVELS IN PNEUMONIA DISSEMINATED INTRAVASCULAR COAGULATION AND LIVER DISEASES." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643914.

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The activity levels of the “new” coagulation inhibitors, heparin cofactor II (HC II) and extrinsic pathway inhibitor (EPI),have been determined with chromogenic substrates assays, in patients with pneumonia (n=8), disseminated intravascular coagulation (DIC) (n=8) and various liver diseases (n=19). For comparison antithrombin (AT) and Protein C (PC) were also measured. In cases with DIC low values (<50%) for HC II,AT and PC were found, while EPI showed a much greater variation (60-190%). Persistent low values heralds a poor prognosis.In survivors is rapidly normalized. In pneumonia , initially low levels (except HC II),were normalized on day 7. HC II may be an acute phase reactant.Conclusion.In cirrhosis, subnormal HC II values suggests reduced synthesis.High EPI values in cirrhosis suggests extrahepatic synthesis.The mechanisms for reduced HC II in DIC,might besides consumption and reduced synthesis, be the liberation of dermatan sulfate from injured intima with increased consumption. Changes in HC II,AT and PC are similar, whereas EPI seems to have different production and metabolism
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Reports on the topic "Extrinsic proteins"

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Nelson, Nathan, and Charles F. Yocum. Structure, Function and Utilization of Plant Photosynthetic Reaction Centers. United States Department of Agriculture, September 2012. http://dx.doi.org/10.32747/2012.7699846.bard.

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Light capturing and energy conversion by PSI is one of the most fundamental processes in nature. In the heart of these adaptations stand PSI, PSII and their light harvesting antenna complexes. The main goal of this grant proposal was to obtain by X-ray crystallography information on the structure of plant photosystem I (PSI) and photosystem II (PSII) supercomplexes. We achieved several milestones along this line but as yet, like several strong laboratories around the world, we have no crystal structure of plant PSII. We have redesigned the purification and crystallization procedures and recently solved the crystal structure of the PSI supercomplex at 3.3 Å resolution. Even though this advance in resolution appears to be relatively small, we obtained a significantly improved model of the supercomplex. The work was published in J. Biol. Chem. (Amunts et al., 2010). The improved electron density map yielded identification and tracing of the PsaK subunit. The location of an additional 10 ß-carotenes, as well as 5 chlorophylls and several loop regions that were previously uninterruptable have been modeled. This represents the most complete plant PSI structure obtained thus far, revealing the locations of and interactions among 17 protein subunits and 193 non-covalently bound photochemical cofactors. We have continued extensive experimental efforts to improve the structure of plant PSI and to obtain PSII preparation amenable to crystallization. Most of our efforts were devoted to obtain well-defined subcomplexes of plant PSII preparations that are amenable to crystallization. We studied the apparent paradox of the high sensitivity of oxygen evolution of isolated thylakoids while BBY particles exhibit remarkable resilience to the same treatment. The integrity of the photosystem II (PSII) extrinsic protein complement as well as calcium effects arise from the Ca2+ atom associated with the site of photosynthetic water oxidation were investigated. This work provides deeper insights into the interaction of PsbO with PSII. Sight-directed mutagenesis indicated the location of critical sites involved in the stability of the water oxidation reaction. When combined with previous results, the data lead to a more detailed model for PsbO binding in eukaryotic PSII.
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