Results 71 to 80 of about 42,156 (211)

The genetic basis of energy conservation in the sulfate-reducing bacterium Desulfovibrio alaskensis G20. [PDF]

, 2014
Sulfate-reducing bacteria play major roles in the global carbon and sulfur cycles, but it remains unclear how reducing sulfate yields energy. To determine the genetic basis of energy conservation, we measured the fitness of thousands of pooled mutants of
Arkin, Adam P, Bauer, Stefan, Deutschbauer, Adam M, Kuehl, Jennifer V, Price, Morgan N, Ray, Jayashree, Wetmore, Kelly M   +6 more
core   +1 more source

Hydrogen Metabolism in Helicobacter pylori Plays a Role in Gastric Carcinogenesis through Facilitating CagA Translocation

mBio, 2016
A known virulence factor of Helicobacter pylori that augments gastric cancer risk is the CagA cytotoxin. A carcinogenic derivative strain, 7.13, that has a greater ability to translocate CagA exhibits much higher hydrogenase activity than its parent ...
Ge Wang, Judith Romero-Gallo, Stéphane L. Benoit, M. Blanca Piazuelo, Ricardo L. Dominguez, Douglas R. Morgan, Richard M. Peek, Robert J. Maier   +7 more
doaj   +1 more source

Mechanism of Hydrogen Sulfide Generation and Prevention Strategies in Oil and Gas Fields: A Case Study of the Sickle Bay Operation Area

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To address the persistent exceedance of hydrogen sulfide (H2S) concentrations and the limited effectiveness of existing treatments in the Sickle Bay oil production area, this study deeply analyzes the mechanism of H2S generation in the Sickle Bay oil production area and proposes targeted prevention and control strategies. The results show that
Bo Lei, Yao‐long Li, Bao‐ping Bai, Xiang‐de Zhang, Guan‐tao Shi, Yong‐long Xie, Chen‐xiao Hou, Cong‐Yu Ke   +7 more
wiley   +1 more source

Photoinhibition of FeFe Hydrogenase [PDF]

ACS Catalysis, 2017
In the enzyme FeFe hydrogenase, hydrogen oxidation and production occur at the H-cluster, a Fe6S6 active site that bears intrinsic carbonyl and cyanide ligands. This enzyme has been coupled to photosensitizers to design H2 photoproduction systems, and yet, according to earlier reports, the enzyme from Desulfovibrio desulfuricans is "easily destroyed ...
Sensi, Matteo, Baffert, Carole, Fradale, Laura, Gauquelin, Charles, Soucaille, Philippe, Meynial Salles, Isabelle, Bottin, Herve, de Gioia, Luca, Bruschi, Maurizio, Fourmond, Vincent, Léger, Christophe, Bertini, Luca   +11 more
openaire   +4 more sources

The exchange activities of [Fe] hydrogenase (iron–sulfur-cluster-free hydrogenase) from methanogenic archaea in comparison with the exchange activities of [FeFe] and [NiFe] hydrogenases [PDF]

, 2007
[Fe] hydrogenase (iron-sulfur-cluster-free hydrogenase) catalyzes the reversible reduction of methenyltetrahydromethanopterin (methenyl-H4MPT+) with H2 to methylene-H4MPT, a reaction involved in methanogenesis from H2 and CO2 in many methanogenic archaea.
Sonja Vogt, Erica J. Lyon, Seigo Shima, Rudolf K. Thauer, PM Vignais, PM Vignais, FA Armstrong, S Shima, JW Peters, Y Nicolet, J Meyer, C Zirngibl, M Korbas, EJ Lyon, M Frey, FA Armstrong, T Liu, T Zhou, A Gebler, C Zirngibl, BS Samuel, K Ma, EL Hendrickson, G Buurman, RK Thauer, J Schleucher, AR Klein, J Schleucher, B Schwörer, AR Klein, GC Hartmann, EJ Lyon, S Shima, O Pilak, GJ Kubas, DM Heinekey, GJ Kubas, A Berkessel, S Shima, DL Hallahan, JT Moore, S Shima, C Afting, C Afting, B Buchenau, S Bartoschek, S Bartoschek, BH Geierstanger, A Berkessel, DE Schwarz, GD Frey, J Cioslowski, AP Scott, JH Teles, GC Welch, X Zhao, A Kayal, EJ Daida, JW Tye, JW Tye, IP Georgakaki, J Eckert, GD Fauque, EC Hatchikian, L Cournac, PM Vignais, M Teixeira, NA Zorin, PM Vignais, M Bernhard, H McTavish   +70 more
core   +1 more source

A Metagenome‐Assembled Genome Catalog From the Global Ruminant Microbiomes

Animal Research and One Health, EarlyView.
The Ruminant Gastrointestinal MAG Catalog (RGMC) is a comprehensive global resource offering 40,812 strain‐level genomes across 53 bacterial and 4 archaeal classes. It greatly surpasses prior efforts in scale and diversity, serving as an essential foundation for research in ruminant nutrition, microbial function, and methane mitigation.
Shizhe Zhang, Qiushuang Li, Bingzi Ouyang, Wenxing Wang, Xiang Zhou, Xiumin Zhang, Rong Wang, Zhiliang Tan, Min Wang   +8 more
wiley   +1 more source

Presence and expression of hydrogenase specific C-terminal endopeptidases in cyanobacteria

BMC Microbiology, 2003
Background Hydrogenases catalyze the simplest of all chemical reactions: the reduction of protons to molecular hydrogen or vice versa. Cyanobacteria can express an uptake, a bidirectional or both NiFe-hydrogenases.
Lindblad Peter, Batur Mehtap, Wünschiers Röbbe   +2 more
doaj   +1 more source

Hydrogen-Oxidizing Bacteria Are Abundant in Desert Soils and Strongly Stimulated by Hydration

mSystems, 2020
How the diverse bacterial communities inhabiting desert soils maintain energy and carbon needs is much debated. Traditionally, most bacteria are thought to persist by using organic carbon synthesized by photoautotrophs following transient hydration ...
Karen Jordaan, Rachael Lappan, Xiyang Dong, Ian J. Aitkenhead, Sean K. Bay, Eleonora Chiri, Nimrod Wieler, Laura K. Meredith, Don A. Cowan, Steven L. Chown, Chris Greening   +10 more
doaj   +1 more source

An Escherichia coli hydrogenase‐3‐type hydrogenase in methanogenic archaea [PDF]

European Journal of Biochemistry, 1998
Methanogenic archaea are known to contain two types of [NiFe] hydrogenases designated F420‐reducing hydrogenase and F420‐non‐reducing hydrogenase. We report here that they additionally contain Escherichia coli hydrogenase‐3‐type [NiFe] hydrogenases.
Künkel, A., Vorholt, J., Thauer, R. ; https://orcid.org/0000-0003-0714-0148, Hedderich, R.   +3 more
openaire   +3 more sources

Great metalloclusters in enzymology [PDF]

, 2002
Metallocluster-containing enzymes catalyze some of the most basic redox transformations in the biosphere. The reactions catalyzed by these enzymes typically involve small molecules such as N2, CO, and H2 that are used to generate both chemical building ...
Rees, Douglas C.
core   +1 more source