IUBMB Enzyme Nomenclature


Accepted name: tylactone mycaminosyltransferase

Reaction: tylactone + dTDP-α-D-mycaminose = dTDP + 5-O-β-D-mycaminosyltylactone

For diagram of reaction click here.

Glossary: tylactone = (4R,5S,6S,7S,9R,11E,13E,15S,16R)-7,16-diethyl-4,6-dihydroxy-5,9,13,15-tetramethyloxacyclohexadeca-11,13-diene-2,10-dione
dTDP-α-D-mycaminose = dTDP-3,6-dideoxy-3-dimethylamino-α-D-glucopyranose

Other name(s): tylM2 (gene name)

Systematic name: dTDP-α-D-mycaminose:tylactone 5-O-β-D-mycaminosyltransferase

Comments: The enzyme participates in the biosynthetic pathway of the macrolide antibiotic tylosin, which is produced by several species of Streptomyces bacteria. Activity is significantly enhanced by the presence of an accessory protein encoded by the tylM3 gene.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Gandecha, A.R., Large, S.L. and Cundliffe, E. Analysis of four tylosin biosynthetic genes from the tylLM region of the Streptomyces fradiae genome. Gene 184 (1997) 197-203. [PMID: 9031628]

2. Melancon, C.E., 3rd, Takahashi, H. and Liu, H.W. Characterization of tylM3/tylM2 and mydC/mycB pairs required for efficient glycosyltransfer in macrolide antibiotic biosynthesis. J. Am. Chem. Soc. 126 (2004) 16726-16727. [PMID: 15612702]

[EC created 2014]

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