hydrogenase


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Related to hydrogenase: nitrogenase

hydrogenase

 [hi´dro-jen-ās″]
an enzyme that catalyzes the reduction of various substances by combining them with molecular hydrogen.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

hy·dro·gen·ase

(hī'drō-jen-ās, hī-droj'ĕ-nās),
1. Any enzyme that removes a hydride ion (or H:-) from NADH (or NADPH). Synonym(s): hydrogenlyase
2. The enzyme that catalyzes the reaction of 2H+ with ferricytochrome or ferredoxin to generate H2.
Farlex Partner Medical Dictionary © Farlex 2012

hydrogenase

(hī-drŏj′ə-nās′, -nāz′)
n.
An enzyme in certain microorganisms that catalyzes the hydrolysis or reduction of a substrate by molecular hydrogen.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

hydrogenase

(1) Hydrogen dehydrogenase, EC 1.12.1.2.
(2) Cytochrome-c3 hydrogenase, EC 1.12.2.1.
(3) EC 1.18.99.1 (transferred to ferredoxin hydrogenase, EC 1.12.7.2).
(4) Any enzyme that removes H+ from NADH or adds H+ to ferricytochrome or ferredoxin.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

hy·dro·gen·ase

(hī-droj'ĕn-ās)
Any enzyme that removes a hydride ion (or H:-) from NADH (or NADPH) or adds hydrogen to ferricytochrome or to ferredoxin.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

hydrogenase

an ENZYME that can use molecular hydrogen to reduce various substances.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Under these conditions, hydrogenase activity was activated to catalyze the [H.sub.2] production reaction (3).
Laishley, "Hydrogenase I of Clostridium pasteurianum functions as a novel selenite reductase," Anaerobe, vol.
Growth- and substrate- dependent transcription of formate dehydrogenase and hydrogenase coding genes in Syntrophobacter fumaroxidans and Methanospirillum hungatei.
The roles of other genes in SZ have also been examined in Chinese patients, such as the genes encoding proline dehydrogenase (PRODH), tryptophan hydrogenase (TPH), apolipoprotein D(APOD), apolipoprotein E(APOE), neuronal acetylcholine receptor subunit [alpha]-7(CHRNA7), and dopamine [beta]-hydroxylase(DBH).
At admission, the neonate had a history of bloody diarrhea, STEC sepsis, thrombocytopenia, hemolytic anemia (plasma concentrations of lactate hydrogenase and hemoglobin were elevated) with fragmented erythrocytes in peripheral blood and acute uremia.
Two nickel-containing enzymes, the hydrogen uptake hydrogenase and urease, are required for colonization and persistence in the stomach.
No No Baseline ALT, U/l 20 15 Paracetamol Dose, mg/kg/d 59 50 Cumulative dose, mg/kg 242 236 Route of administration Rectal 1 g IV by ICU administration arrival, followed by rectal administration Highest ALT, U/l 250 2837 Corresponding AST, U/l 173 5590 Day of ICU stay of Day 3 Day 5 highest ALT Other liver function Bilirubin 12 CK 131 U/l, GGT 56 tests * [micro]mol/l, CK 98 U/l, LD 3518 U/l, U/l, LD 522 U/l, INR 4.1 INR 6.6 Progression disease Cardiogenic shock Cardiogenic shock and multi-organ (tamponade) failure Outcome Died 2 days Died 5 days postoperatively postoperatively * Reference levels: bilirubin: <17 [micro]mol/l, creatinekinase: <175 U/l, [gamma]/glutamyltransferase: <50 U/l; lactate hydrogenase: <220 U/l, INR: <1.2.
using PCR primers specific to [NiFe] hydrogenase gene sequences (Wawer & Muyzer 1995), as well as for marine benthic Archaea in deepsea sediments (Vetriani et al.
Among 127 sequences were classified to possess hydrogenase activity, and 26 sequences were matched with carbohydrate-degrading enzymes.
The reduced ferredoxin is reoxidized by the hydrogenase to form hydrogen.

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