The Enzyme Database

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Accepted name: 5′-hydroxyaverantin dehydrogenase
Reaction: (1) (1′S,5′S)-hydroxyaverantin + NAD+ = 5′-oxoaverantin + NADH + H+
(2) (1′S,5′R)-hydroxyaverantin + NAD+ = 5′-oxoaverantin + NADH + H+
Glossary: 5′-oxoaverantin = 1,3,6,8-tetrahydroxy-2-[(1S)-1-hydroxy-5-oxohexyl]anthracene-9,10-dione
Other name(s): HAVN dehydrogenase; adhA (gene name)
Systematic name: (1′S,5′S)-hydroxyaverantin:NAD+ oxidoreductase
Comments: Isolated from the aflatoxin-producing mold Aspergillus parasiticus [2]. Involved in aflatoxin biosynthesis. 5′-Oxoaverantin will spontaneously form averufin by intramolecular ketalisation. cf. EC, 5′-oxoaverantin cyclase.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Chang, P.K., Yu, J., Ehrlich, K.C., Boue, S.M., Montalbano, B.G., Bhatnagar, D. and Cleveland, T.E. adhA in Aspergillus parasiticus is involved in conversion of 5′-hydroxyaverantin to averufin. Appl. Environ. Microbiol. 66 (2000) 4715–4719. [DOI] [PMID: 11055914]
2.  Sakuno, E., Yabe, K. and Nakajima, H. Involvement of two cytosolic enzymes and a novel intermediate, 5′-oxoaverantin, in the pathway from 5′-hydroxyaverantin to averufin in aflatoxin biosynthesis. Appl. Environ. Microbiol. 69 (2003) 6418–6426. [DOI] [PMID: 14602595]
[EC created 2013]

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