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Dissertations / Theses on the topic 'Comamonas'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Gumaelius, Lena. "Development of a toxicity test for denitrification, using Comamonas denitrificans /." Stockholm : Tekniska högsk, 2001. http://media.lib.kth.se:8080/kthdisseng.html.

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2

Uroz, Stéphane. "Dégradation des N-acyl homosérine lactones, médiateurs de la régulation quorum sensing : les organismes, les mécanismes, les applications potentielles." Paris 11, 2004. http://www.theses.fr/2004PA112123.

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Les souches bactériennes d'une rhizosphere de tabac appartenant aux genres Comamonas, Pseudomonas, Rhodococcus et Variovorax présentent des cinétiques et des spectres de dégradation de N-AHSL variables. Parmi celles-ci, les souches de Comamonas sp. (D1) et de Rhodococcus (W2) sont capables d'inactiver toutes les N-AHSL quelques soient leurs substitutions sur le carbone 3. Ces deux souches sont capables d'interférer efficacement avec des fonctions régulées par QS chez d'autres bactéries. La dégradation des N-AHSL par la souche W2 est due à au moins deux activités enzymatiques : une activité oxy

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3

Schäfers, Christina. "Identifizierung von cis- und transregulatorischen Elementen der 3[alpha]-Hydroxysteroiddehydrogenase [3-alpha-Hydroxysteroiddehydrogenase], Carbonylreduktase-Expression in Comamonas testosteroni." [S.l.] : [s.n.], 2005. http://archiv.ub.uni-marburg.de/diss/z2005/0230/.

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4

Providenti, Miguel A. "Identification and characterization of CbaR, a repressor of cbaABC, the 3-chlorobenzoic acid catabolic genes of Comamonas testosteroni BR60 (pBRC60)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0015/NQ48351.pdf.

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5

Providenti, Miguel A. (Miguel Andres) Carleton University Dissertation Biology. "Identification and characterization of CbaR; a repressor of cbaABC, the 3-chlorobenzoic acid catabolic genes of comamonas testosteroni BR60 (pBRC60)." Ottawa, 2000.

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6

Schläfli, Oppenberg Hans Rudolf Schläfli Oppenberg Hans Rudolf Schläfli Oppenberg Hans Rudolf. "Enzymes in the degradative pathway of p-toluenesulfonate and p-toluate and regulation of their expression in Comamonas testosteroni T-2 /." Zürich, 1995. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11157.

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7

Florin, Claire. "La 3-cetosteroide-delta 4 (5 alpha-)-deshydrogenase de comamonas testosteroni : clonage, sequencage et expression du gene dans des systemes heterologues." Besançon, 1996. http://www.theses.fr/1996BESA3709.

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8

Gong, Wenjie [Verfasser]. "Characterization of the LysR-type Transcriptional Regulator HsdR Gene and Its Adjacent Short-chain Dehydrogenase, Reductase SDRx Gene in Comamonas testosteroni ATCC 11996 / Wenjie Gong." Kiel : Universitätsbibliothek Kiel, 2011. http://d-nb.info/1020244666/34.

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9

Hoffmann, Frank [Verfasser]. "Carbonyl Reductases and Pluripotent Hydroxysteroid Dehydrogenases of the Short-Chain Dehydrogenase/Reductase Superfamily : Structural Aspects of Oligomerization in 3-Hydroxysteroid Dehydrogenase/Carbonyl Reductase from Comamonas testosteroni / Frank Hoffmann." Hamburg : Diplom.de, 2009. http://d-nb.info/1117660591/34.

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10

Pan, Tianyuan [Verfasser], Edmund [Akademischer Betreuer] Maser та Sabine [Gutachter] Fuchs. "Isolation and identification of two repressors, TetR AND LuxR, FOR 3,17β-hsd and 3α-hsd/cr gene regulation in Comamonas testosteroni / Tianyuan Pan ; Gutachter: Sabine Fuchs ; Betreuer: Edmund Maser". Kiel : Universitätsbibliothek Kiel, 2019. http://d-nb.info/1202630332/34.

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11

Khettal, Bachra. "La Δ-5-3- cetosteroide isomerase de pseudomonas testosteroni : etude dans les micelles inverses et obtention d'abymes a activite similaire". Paris 5, 1994. http://www.theses.fr/1994PA05S013.

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La cetosteroide isomerase est une enzyme-cle dans la biosynthese des hormones steroides. Son etude est importante sur le plan fondamental et sur le plan de la biotechnologie. Nous avons choisi d'etudier ce systeme par 2 approches originales et nous avons pris comme modele l'isomerase de pseudomonas tetosteroni, enzyme catalysant la meme reaction. 1) etude de la cinetique de l'isomerase dans 3 types de micelles inverses formees d'aot, de ctab ou de nikkol. Les 2 substrats utilisees sont de polarite differente (estren-17ol, 3-one et androstenedione). L'isomerase est apparue plus stable dans les

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12

Zink, Olivier. "Identification de l'HPP oxydase d'Arthrobacter globiformis et de la 4-HPA 1-hydroxylase de Pseudomonas acidovorans : étude du métabolisme de la tyrosine par des cellules végétales en utilisant la 13C-RMN." Grenoble 1, 2000. http://www.theses.fr/2000GRE10192.

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Pour obtenir des plantes resistantes aux inhibiteurs de l'hydroxyphenylpyruvate dioxygenase (hppd), nous avons souhaite construire une voie metabolique contournant l'hppd en introduisant les genes codant l'hydroxyphenylpyruvate oxydase (hppo) et la 4-hydroxyphenylacetate 1-hydroxylase. Nous decrivons ici l'identification de trois genes bacteriens codant ces deux activites enzymatiques. - le gene hppo, identifie chez arthrobacter globiformis, code l'hppo (e. C. 1. 2. 3. -) qui catalyse l'oxydation du 4-hydroxyphenylpyruvate en 4-hydroxyphenylacetate (4-hpa). C'est la premiere fois que la protei

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13

Göhler, André [Verfasser]. "Molekulare Regulation des Steroidstoffwechsels in Comamonas testosteroni / vorgelegt von André Göhler." 2010. http://d-nb.info/1010575406/34.

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14

KUO, DING-CHUAN, and 郭丁傳. "The study of Comamonas sp. L8U biosynthesized homopolymer poly(3-hydroxyvalerate)." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2eex8h.

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碩士<br>國立高雄海洋科技大學<br>海洋生物技術研究所<br>105<br>Comamonas sp. L8U, a wild type bacterium isolated from soil in Taiwan. It grow and biosynthesized PHA under pH from 7.2 to 8.0. The optimal growth temperature is at 30oC (0.95 g/L of PHA yield). Levulinic acid is a renewable carbon source and can be transformed from cellulose catalyzed by acid. Cellulose is the component of agricultural wastes such as straws and bangasse. Levulinic acid is toxic for many bacteria generally. Comamonas sp. L8U accumulate high content of PHA from levulinic acid as sole carbon source. The polymer consisted of 96 mol% 3-hydro

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15

Vilímková, Lenka. "Biotransformace fenolických látek enzymovými systémy kvasinky Candida tropicalis a bakterie Comamonas testosteroni." Doctoral thesis, 2011. http://www.nusl.cz/ntk/nusl-311550.

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Candida tropicalis yeast and bacteria Comamonas testosteroni have been considered to be able to metabolize phenol and utilize it as the only source of carbon and energy. In our laboratory we investigated the cytoplasmic enzymes responsible for the first and second step of phenol degradation, NADPH-dependent phenol hydroxylase of both C. tropicalis and C. testosteroni and catechol 1,2-dioxygenase of C. tropicalis. The aim of our study was to isolate and partially characterize those enzymes. Phenol hydroxylase purification consisted of preparation of cytosol from C. tropicalis yeast by fraction

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16

Pesce, Karen. "Molecular analysis of phenanthrene degradation by Comamonas testosteroni GZ38 and Acidovorax sp. GZ39." 2008. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17548.

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17

AGARWAL, TUSHAR. "CLONING, EXPRESSION, PURIFICATION AND BIOINFORMATICS ANALYSIS OF ARSENITE OXIDASE (homologue) FROM Comamonas testosteroni KF1." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19955.

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Arsenic pollution in water is a major problem that has been observed in many underdeveloped nations across the world. Arsenic (As) contamination has recently drawn major attention to the environmental destiny and behavior of As in Southeast Asian nations including Bangladesh, India, China, Chile, and Japan. Water contamination with As is brought on by a number of natural and anthropogenic processes, both direct and indirect. Because it causes As poisoning in humans, arsenic-contaminated water poses a serious hazard to humanity. Therefore, it is essential to handle polluted water as

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18

Agar, Nathalie Yvonne Rachel. "Identification of molecular determinants of substrate specificity and activity for biphenyl dioxygenase from Comamonas testosteroni B-356." Thesis, 2002. http://spectrum.library.concordia.ca/1841/1/NQ73337.pdf.

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The oxygenase component of biphenyl dioxygenase (BPDO) from Comamonas testosteroni B-356 dihydroxylates biphenyl and some polychlorinated biphenyls (PCBs), thereby initiating their degradation. Identification of molecular determinants for BPDO substrate selectivity and activity should allow engineering it to accept a range of chlorinated biphenyls for bioremediation. Highly active BPDO has been purified, and crystallized under anaerobic conditions. The first crystal structures of BPDO, and its substrate-bound and product-bound binary complexes, have been solved. Steady-state kinetics assays m

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19

Chang, Yi-Hsun, and 張藝薰. "The study of catalytic mechanism in 3alpha-hydroxysteroid dehydrogenase/carbonyl reductase (3alpha-HSD/CR) from Comamonas testosteroni." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/98601101131610947073.

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博士<br>高雄醫學大學<br>醫學研究所<br>98<br>3alpha-hydroxysteroid dehydrogenase/carbonyl reductase (3alpha-HSD/CR) from Comamonas testosteroni catalyzes the oxidation of androsterone with NAD+ to form androstanedione and NADH. According to the sequence alignment and structure analysis, a catalytic tetrad of Asn-86, Ser-114, Tyr-155, and Lys-159 in 3alpha-HSD/CR has been proposed. In this study, we will explore the functional roles of catalytic tetrad in 3alpha-HSD/CR-catalyzed reaction. In the first part, we combined site-directed mutagenesis, steady-state kinetics, and pH profile to elucidate the functi

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20

Aumont, Roch. "DNA shuffling of biphenyl dioxygenase genes, bphAE or bphE, from Comamonas testosteroni B-356 and Burkholderia cepacia LB400." Thesis, 2002. http://spectrum.library.concordia.ca/2213/1/MQ85279.pdf.

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Bacterial degradation of biphenyl and some polychlorinated biphenyls is initiated by and dependent on the ability of biphenyl 2,3-dioxygenase to dihydroxylate substrate. Biphenyl 2,3-dioxygenase is a multi-component enzyme requiring reductase (BphG) and ferredoxin (BphF) components that transport electrons from NADH to the terminal dioxygenase. DNA shuffling of bphAE , using various techniques to create random fragments, resulted either in a very low yield of reassembled product and a high level of non-specific recombination, or in reassembly of wild type enzymes. Sequencing of parts of 13 ra

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21

Hsu, Chao-Nan, and 徐肇男. "Studies on the Role of Asp 249 in Stabilizing Dimer Formation in 3alpha-Hydroxysteroid Dehydrogenase/Carbonyl Reductase From Comamonas Testosteroni." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/09592048919770643162.

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碩士<br>高雄醫學大學<br>生物化學研究所碩士班<br>93<br>3α-Hydroxysteroid dehydrogenase/carbonyl reductase ( 3α-HSD/CR，EC 1.1.1.50 ) from Comamonas testosteroni is an inducible enzyme which catalyzes the oxidation of androsterone with NAD+ to form androstanedione and NADH. 3α-HSD/CR was a member of the SDRs family, whose crystal structure had been solved by X-ray diffraction in 2000. The structure of 3α-HSD/CR is a homodimer which shows a typical pattern of Rossmann-fold structure consisting of βαβ units, and reaveals similarity with other members upon the SDRs family. The dimerization in 3α-HSD/CR had been prop

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22

Huang, Tzu-Jung, and 黃姿蓉. "Studies on the Structural and Functional Roles of Arg167 in the Oligomerization of 3alpha-Hydroxysteriod Dehydrogenase/Carbonyl Reductase From Comamonas testosteroni." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/36796219237886863919.

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碩士<br>高雄醫學大學<br>生物化學研究所碩士班<br>95<br>3α-Hydroxysteroid dehydrogenase/carbonyl reductase (3α-HSD/CR) from Comamonas testosteroni, a member of the short-chain dehydrogenase/reductase (SDR) family, catalyzes the oxidation of androsterone with NAD+ to form androstanedione and NADH. Previously studies have showed the residue Tyr155 acts as a general base in the 3α-HSD/CR catalyzed reaction. Structurally, 3α-HSD/CR is a homodimer. A salt-bridge interaction is formed between the Asp249 in helix αCT of each subunit with Arg167 in helix αF of other subunit based on structural analysis. To explore the st

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23

Schäfers, Christina [Verfasser]. "Identifizierung von cis- und transregulatorischen Elementen der 3α-Hydroxysteroiddehydrogenase [3-alpha-Hydroxysteroiddehydrogenase], Carbonylreduktase-Expression in Comamonas testosteroni / vorgelegt von Christina Schäfers". 2005. http://d-nb.info/975289977/34.

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24

WU, CHONG-PING, and 吳崇平. "The study of terpolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) biosynthesized by the recombinant strain of Comamonas sp." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/j4hn9h.

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碩士<br>國立高雄科技大學<br>海洋生物技術系<br>107<br>Comamonas sp. L8U is isolated form environmental soils in Taiwan. Deletion PHA synthase phaCL8U gene and the thioesterase genes, TE2 and TE4, which can hydrolyze 3-hydroxybutyryl-CoA (3HBCoA). Exhibiting phaC1 gene of a broad range substrate specificity from Pseudomonas putida H9, (R)-specific enoyl-CoA hydratase (phaJ) of Aeromonas caviae which converts the internediate β-oxidation pathway, trans-2-enoyl-CoA, into (R)-3-hydroxyhexanoyl-CoA, and the hemoglobin vgb of Viteloscilla sp. of. The carbon source levulinic acid used in this study is a renewable carb

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25

Schüller, Christina [Verfasser]. "Studie über die Genregulation der Expression der 3α-Hydroxysteroid-Dehydrogenase [3-alpha-Hydroxysteroid-Dehydrogenase] im Bakterium Comamonas testosteroni / vorgelegt von Christina Schüller". 2006. http://d-nb.info/978914848/34.

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26

Su, Yu-Wang, та 蘇育王. "1.ArsA1 structure recognition with chloroplast TA protein 2. Protein purification and crystallization of 3α-HSD Y155F-K159A mutation in Comamonas testosterone". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/vt54kr.

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碩士<br>國立中山大學<br>海洋生物科技暨資源學系研究所<br>107<br>Tail-anchored (TA) membrane protein is safely transported to the endoplasmic reticulum (ER) membrane in mammals and yeast via the TRC40/GET3 binding factor. However, the mechanism by which the TA protein is delivered remains unclear in plants. This unique eukaryotic cell membrane transport system correctly distinguishes between different TA proteins for various organelles, including the mitochondria, chloroplast and ER TA proteins. In this experiment, we want to express the protein of green algae (C. reinhardtii) ArsA1 (GET3 homolog), and to understand

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27

Markowetz, Stefanie Bernadette [Verfasser]. "Die Funktion zweier Operator-Sequenzen in der Regulation der 3α-Hydroxysteroid-Dehydrogenase/Carbonylreduktase [3-alpha-Hydroxysteroid-Dehydrogenase-Carbonylreduktase] von Comamonas testosteroni / vorgelegt von Stefanie Bernadette Markowetz". 2006. http://d-nb.info/982223234/34.

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28

Hoffmann, Frank [Verfasser]. "Carbonyl reductases and pluripotent hydroxysteroid dehydrogenases of the short-chain dehydrogenase, reductase superfamily : structural aspects of oligomerization in 3α-hydroxysteroid dehydrogenase, carbonyl reductase from Comamonas testosteroni ; new approaches for efficient protein design / vorgelegt von Frank Hoffmann". 2009. http://d-nb.info/999866907/34.

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