Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
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MetaCyc Compound: H2

Synonyms: hydrogen, hydrogen molecule

Chemical Formula: H2

Molecular Weight: 2.016 Daltons

Monoisotopic Molecular Weight: 2.0156500642 Daltons

SMILES: [HH]

InChI: InChI=1S/H2/h1H

InChIKey: InChIKey=UFHFLCQGNIYNRP-UHFFFAOYSA-N

Unification Links: CAS:1333-74-0 , ChEBI:18276 , ChemSpider:762 , HMDB:HMDB01362 , IAF1260:34488 , KEGG:C00282 , MetaboLights:MTBLC18276 , PubChem:783

Standard Gibbs Free Energy of Change Formation (ΔfG in kcal/mol): 24.752243 Inferred by computational analysis [Latendresse13]

Reactions known to consume the compound:

coenzyme B/coenzyme M regeneration :
methanophenazine + H2 → dihydromethanophenazine

sulfur reduction I :
S0 + H2 → hydrogen sulfide

sulfur reduction II (via polysulfide) :
(sulfide)n + H2 → hydrogen sulfide + (sulfide)n-1

Not in pathways:
a menaquinone[inner membrane] + 2 H+ + H2[periplasmic space] → a menaquinol[inner membrane] + 2 H+[periplasmic space]

Reactions known to produce the compound:

hydrogen production I :
2 an oxidized ferredoxin + NAD+ + 2 H2 ← 2 a reduced ferredoxin + NADH + 3 H+

mixed acid fermentation :
formate + H+ → CO2 + H2

nitrogen fixation :
8 reduced ferredoxins + N2 + 16 ATP + 16 H2O ↔ 8 oxidized ferredoxins + 2 ammonium + 16 ADP + 16 phosphate + H2 + 6 H+

Reactions known to both consume and produce the compound:

glutamate degradation VII (to butanoate) , hydrogen production III , hydrogen production VIII , superpathway of fermentation (Chlamydomonas reinhardtii) :
2 an oxidized ferredoxin + H2 ↔ 2 a reduced ferredoxin + 2 H+

hydrogen oxidation I (aerobic) , hydrogen production VI :
an oxidized electron acceptor + H2 ↔ a reduced electron acceptor

hydrogen oxidation II (aerobic, NAD) , hydrogen production II :
NAD+ + H2 ↔ NADH + H+

hydrogen oxidation III (anaerobic, NADP) , hydrogen production IV :
NADP+ + H2 ↔ NADPH + H+

hydrogen production V :
a reduced hydrogenase 3 + 2 H+ ↔ an oxidized hydrogenase 3 + H2

methanogenesis from CO2 :
5,10-methenyltetrahydromethanopterin + H2 ↔ 5,10-methylene-tetrahydromethanopterin + H+

Not in pathways:
a reduced nitrogenase + N2 + 8 H+ ↔ 2 ammonium + an oxidized nitrogenase + H2
NAD(P)+ + H2 ↔ NAD(P)H + H+

In Reactions of unknown directionality:

Not in pathways:
carbon monoxide + H2O = CO2 + H2
an oxidized coenzyme F420 + H2 = a reduced coenzyme F420
a menaquinone + H2 = a menaquinol
an oxidized cytochrome c3 + 2 H2 = a reduced cytochrome c3 + 2 H+

In Redox half-reactions:
2 H+[out] + 2 e-H2[out] ,
2 H+[in] + 2 e-H2[in]


References

Latendresse13: Latendresse M. (2013). "Computing Gibbs Free Energy of Compounds and Reactions in MetaCyc."


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by SRI International Pathway Tools version 18.5 on Fri Nov 28, 2014, BIOCYC13A.