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Dissertations / Theses on the topic 'Zinc metalloenzyme'

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1

Xie, Juan. "Synthèse, étude biologique et pharmacologique de nouveaux inhibiteurs des enzymes de dégradation des enképhalines." Paris 5, 1988. http://www.theses.fr/1988PA05P617.

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2

McMillen, Lyle, and l. mcmillen@sct gu edu au. "Isolation and Characterisation of the 5'-Nucleotidase from Escherichia coli." Griffith University. School of Biomolecular and Biomedical Science, 2001. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030226.153545.

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Escherichia coli 5'-nucleotidase is a periplasmically localised enzyme capable of hydrolysing a broad range of substrates, including all 5'-ribo- and 5'-deoxyribonucleotides, uridine diphosphate sugars, and a number of synthetic substrates such as bis (r-nitrophenyl) phosphate. The enzyme has been shown to contain at least one zinc ion following purification, and to have two metal binding sites in the catalytic cleft. 5'-Nucleotidase activity is significantly stimulated by the addition of particular divalent metal ions, most notably cobalt which results in a 30-50 fold increase in activity.
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3

McMillen, Lyle. "Isolation and Characterisation of the 5'-Nucleotidase from Escherichia coli." Thesis, Griffith University, 2001. http://hdl.handle.net/10072/366487.

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Escherichia coli 5'-nucleotidase is a periplasmically localised enzyme capable of hydrolysing a broad range of substrates, including all 5'-ribo- and 5'-deoxyribonucleotides, uridine diphosphate sugars, and a number of synthetic substrates such as bis (r-nitrophenyl) phosphate. The enzyme has been shown to contain at least one zinc ion following purification, and to have two metal binding sites in the catalytic cleft. 5'-Nucleotidase activity is significantly stimulated by the addition of particular divalent metal ions, most notably cobalt which results in a 30-50 fold increase in activity.
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4

Myers, Andrew Ross. "Cloning, Expression, and Sequence Analysis of Camelysin, a Zinc Metalloprotease from Bacillus anthracis and B. cereus." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001218.

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5

Nedonchelle, Elsa. "Les anticorps catalytiques : des outils pour la production et l'étude des anticorps catalytiques semi-synthétiques et auto-immuns." Compiègne, 2000. http://www.theses.fr/2000COMP1320.

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Les anticorps catalytiques associent les propriétés de reconnaissance des anticorps aux propriétés de catalyse des enzymes. Différentes approches ont été envisagées pour leur faire mimer les enzymes : analogues d'états de transition, copie du site actif par le réseau idiotypique, ingénierie des protéines. De nombreuses enzymes s'associent avec des métaux pour assurer leurs fonctions. Le zinc est un élément intéressant dans ce cas car retrouvé dans plus de 300 enzymes. Ces sites de fixation étant bien caractérisés, ils ont pu semir de modèle en biotechnologie dans l'ingénierie des protéines. L'
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6

Patil, Vishal. "Design and synthesis of small molecule inhibitors of zinc metalloenzymes." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45859.

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Histone deacetylases (HDACs) are a class of enzymes that play a crucial role in DNA expression by removing an acetyl group from the ɛ-N-acetyl lysine residue on histone proteins. Out of 18 isoforms of HDAC enzymes which are classified into 4 classes, only 11 of them are metalloenzymes that require zinc for its catalytic activity. HDACs are considered promising target for drug development in cancer and other parasitic diseases due to their role in gene expression. Histone deacetylase inhibitors (HDACi) can cause cell cycle arrest, and induce differentiation or apotosis. While HDACi shows promis
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7

Salter, Michael H. "The study of models for zinc(II) metalloenzymes in aqueous solution /." Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/salterm/michaelsalter.html.

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8

Pérez, Olmo Cristina. "Polar tris(pyrazolyl)borates for the modeling of zinc metalloenzymes in aqueous solution." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975035436.

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9

Camberlein, Virgyl. "Target-guided synthesis of metalloenzymes ligands with therapeutic applications." Thesis, Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILS004.

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La synthèse guidée par la cible de ligands protéiques est une stratégie innovante pour découvrir des composés bioactifs. En particulier, la Kinetic Target-Guided Synthesis (KTGS) and the Dynamic Combinatorial Chemistry (DCC) ont permis, ces dernières années, de découvrir des ligands originaux pour des cibles thérapeutiques mal explorées, ce qui a permis de lancer des projets de découverte de médicaments. Ce projet de thèse vise à utiliser la KTGS pour découvrir, puis optimiser des ligands de deux classes de métalloenzymes que sont les aminopeptidases du réticulum endoplasmiques (ERAP) et l’éla
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10

Debela, Mekdes Haile Mariam. "Crystal structures of the human tissue kallikreins 4, 5, 7, 10, characterisation of their substrate specificity and analysis of their various zinc inhibition mechanisms." München Verl. Dr. Hut, 2007. http://d-nb.info/988422395/04.

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11

Mujumdar, Prashant. "Synthesis and Biological Evaluation of Unusual Natural Products and Novel Heterocyclic Chemotypes as Carbonic Anhydrase Inhibitors." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/366972.

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Carbonic anhydrases (CAs) are zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide to bicarbonate and a proton. The zinc cation in the active site of these metalloenzymes is the suggested target for small molecule inhibitors to block the endogenous CA catalysed reaction. Almost all reported CA inhibitors consist of zinc binding group (ZBG) among which the, primary sulfonamide group (-SO2NH2) is the most prominent example. Primary sulfamate (-OSO2NH2) and primary sulfamide (-NH-SO2NH2) groups also serve as zinc binding groups in CA inhibitors, however they are less repre
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12

Elisée, Eddy. "Towards in silico prediction of mutations related to antibiotic resistance." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS350.

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La résistance aux antibiotiques est une menace sérieuse pour la santé publique. En effet, si on ne change pas rapidement notre consommation excessive d'antibiotiques, la situation actuelle va se dégrader jusqu'à basculer dans une ère dite "post-antibiotique", dans laquelle plus aucun antibiotique ne sera efficace contre les infections microbiennes. Bien que ce phénomène de résistance apparaît naturellement, l'utilisation abusive d'antibiotiques accélère le processus. De plus, la présence de pathogènes multi-résistants neutralise l'effet des traitements existants et dans le cas de chirurgies co
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13

Sukdeo, Nicole. "Biochemical and Biophysical Investigations of Non-Zinc Dependent Glyoxalase I Enzymes." Thesis, 2008. http://hdl.handle.net/10012/4057.

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The principal methylglyoxal (MG)-detoxifying system in most living organisms is the two metalloenzyme Glyoxalase system. Glyoxalase I (GlxI) initially converts the non-enzymatically formed MG-GSH hemithioacetal to the thioester S,D-lactoylglutathione. The hydrolase, Glyoxalase II(GlxII) regenerates GSH and liberates the product D-lactate. Ni2+/Co2+- and Zn2+-activated GlxI enzymes exist in nature. The Ni2+/Co2+-activated GlxI are not active as Zn2+-holoenzymes in spite of the structural similarities to the Zn2+-dependent enzymes. The Zn2+-GlxI enzymes have been investigated heavily relative to
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14

Pérez, Olmo Cristina [Verfasser]. "Polar tris(pyrazolyl)borates for the modeling of zinc metalloenzymes in aqueous solution / vorgelegt von Cristina Pérez Olmo." 2005. http://d-nb.info/975035436/34.

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15

Rhoads, Timothy W. "Measuring protein metal binding via mass spectrometry : copper, zinc superoxide dismutase and amyotrophic lateral sclerosis." Thesis, 2012. http://hdl.handle.net/1957/31348.

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Amyotrophic lateral sclerosis (ALS) is a devastating disease characterized by the progressive degeneration of motor neurons. Dominantly-inherited mutations to the antioxidant enzyme Cu,Zn superoxide dismutase (SOD1) cause 3-6% of all ALS cases. The complete mechanism behind the toxicity of mutant SOD1 remains unclear, although significant evidence points to aberrant or incomplete metal-binding having a role in a toxic gain-of-function. However, the relevance of the metal-binding of SOD1 to mutant-SOD1-linked ALS remains controversial. Direct assessments of protein metal-binding from transgenic
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16

Selvi, A. Tamil. "Metallo-β-Lactamase, Phosphotriesterase And Their Functional Mimics". Thesis, 2009. http://hdl.handle.net/2005/994.

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Metallohydrolases with dinuclear-zinc active sites perform many important biological hydrolytic reactions on a variety of substrates. In this regard, metallo-β-lactamases (mβ1, class B) represent a unique subset of zine hydrolases that hydrolyze the β-lactam ring in several antibiotics. The antibiotic resistance that results from this hydrolysis is becoming an increased threat for the clinical community. These metalloenzymes can hydrolyze a wide range of β-lactam substrates, such as cephamycins and imipenem that are generally resistant t the serine-containing β-lactamases. Therefore, the clini
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