Join us at the Metabolomics Conference tutorial
June 28th 2015
Join us at the Metabolomics Conference tutorial
June 28th 2015
Join us at the Metabolomics Conference tutorial
June 28th 2015
Join us at the Metabolomics Conference tutorial
June 28th 2015
Join us at the Metabolomics Conference tutorial
June 28th 2015

MetaCyc Reaction:

Superclasses: Reactions Classified By Conversion Type Simple Reactions Chemical Reactions
Reactions Classified By Substrate Small-Molecule Reactions

EC Number:

Enzymes and Genes:

Saccharomyces cerevisiae : alcohol dehydrogenase / S-hydroxymethyl-glutathione dehydrogenase Inferred from experiment : SFA1
alcohol dehydrogenase I Inferred from experiment : ADH1
alcohol dehydrogenase II Inferred from experiment : ADH2
alcohol dehydrogenase III Inferred from experiment : ADH3
alcohol dehydrogenase IV Inferred from experiment : ADH4
alcohol dehydrogenase V Inferred from experiment : ADH5

In Pathway: L-isoleucine degradation II

Note that this reaction equation differs from the official Enzyme Commission reaction equations for this EC number, which can be found here and here .

The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.

Most BioCyc compounds have been protonated to a reference pH value of 7.3, and some reactions have been computationally balanced for hydrogen by adding free protons. Please see the PGDB Concepts Guide for more information.

Mass balance status: Balanced.

Enzyme Commission Primary Name: alcohol dehydrogenase

Enzyme Commission Synonyms: aldehyde reductase, ADH, alcohol dehydrogenase (NAD), aliphatic alcohol dehydrogenase, ethanol dehydrogenase, NAD-dependent alcohol dehydrogenase, NAD-specific aromatic alcohol dehydrogenase, NADH-alcohol dehydrogenase, NADH-aldehyde dehydrogenase, primary alcohol dehydrogenase, yeast alcohol dehydrogenase

Standard Gibbs Free Energy (ΔrG in kcal/mol): 2.541809 Inferred by computational analysis [Latendresse13]

Enzyme Commission Summary:
A zinc protein. Acts on primary or secondary alcohols or hemi-acetals with very broad specificity; however the enzyme oxidizes methanol much more poorly than ethanol. The animal, but not the yeast, enzyme acts also on cyclic secondary alcohols.

Citations: [Jornvall77a, THEORELL58]

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

Instance reaction of [S-hydroxymethylglutathione + NAD(P)+S-formylglutathione + NAD(P)H + H+] (
i7: S-hydroxymethylglutathione + NAD+ = S-formylglutathione + NADH + H+ (1.-.-.-)

Instance reactions of [a primary alcohol + NAD+ ↔ an aldehyde + NADH + H+] (
i1: 1-hexanol + NAD+ ← hexanal + NADH + H+ (1.1.1.-)

i2: 1-octanol + NAD+ = octanal + NADH + H+ (

i3: butanal + NADH + H+ → n-butanol + NAD+ (1.1.1.-)

i4: ethanol + NAD+ ↔ acetaldehyde + NADH + H+ (

i5: phytol + NAD+ → phytenal + NADH + H+ (

i6: n-propanol + NAD+ ↔ propanal + NADH + H+ (

Relationship Links: BRENDA:EC: , ENZYME:EC: , IUBMB-ExplorEnz:EC:


Jornvall77a: Jornvall H (1977). "Differences between alcohol dehydrogenases. Structural properties and evolutionary aspects." Eur J Biochem 72(3);443-52. PMID: 320001

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

THEORELL58: THEORELL H (1958). "Kinetics and equilibria in the liver alcohol dehydrogenase system." Adv Enzymol Relat Subj Biochem 20;31-49. PMID: 13605979

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 19.0 on Tue Jun 30, 2015, biocyc14.