IUBMB Enzyme Nomenclature


Accepted name: propanediol dehydratase

Reaction: propane-1,2-diol = propanal + H2O

Other name(s): meso-2,3-butanediol dehydrase; diol dehydratase; DL-1,2-propanediol hydro-lyase; diol dehydrase; adenosylcobalamin-dependent diol dehydratase; propanediol dehydrase; coenzyme B12-dependent diol dehydrase; 1,2-propanediol dehydratase; dioldehydratase; propane-1,2-diol hydro-lyase

Systematic name: propane-1,2-diol hydro-lyase (propanal-forming)

Comments: Two different forms of the enzyme have been described. One form requires a cobamide cofactor, while the other is a glycyl radical enzyme. The cobamide-dependent enzyme has been shown to also dehydrate ethylene glycol to acetaldehyde.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9026-90-8


1. Abeles, R.H. and Lee, H.A., Jr. An intramolecular oxidation-reduction requiring a cobamide coenzyme. J. Biol. Chem. 236 (1961) 2347-2350. [PMID: 13680987]

2. Lee, H.A. and Abeles, R.H. Purification and properties of dioldehydrase, and enzyme requiring a cobamide coenzyme. J. Biol. Chem. 238 (1963) 2367-2373. [PMID: 13929077]

3. Forage, R.G. and Foster, M.A. Glycerol fermentation in Klebsiella pneumoniae: functions of the coenzyme B12-dependent glycerol and diol dehydratases. J. Bacteriol. 149 (1982) 413-419. [PMID: 7035429]

4. LaMattina, J.W., Keul, N.D., Reitzer, P., Kapoor, S., Galzerani, F., Koch, D.J., Gouvea, I.E. and Lanzilotta, W.N. 1,2-Propanediol Dehydration in Roseburia inulinivorans: Structural basis for substrate and enantiomer selectivity. J. Biol. Chem 291 (2016) 15515-15526. [PMID: 27252380]

[EC created 1965]

Return to EC 4.2.1 home page
Return to EC 4.2 home page
Return to EC 4 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page