IUBMB Enzyme Nomenclature


Accepted name: 24-methylenesterol C-methyltransferase

Reaction: S-adenosyl-L-methionine + 24-methylenelophenol = S-adenosyl-L-homocysteine + (Z)-24-ethylidenelophenol

For diagram click here.

lophenol = 4α-methyl-5α-cholesta-7-en-3β-ol

Other names: SMT2; 24-methylenelophenol C-241-methyltransferase

Systematic name: S-adenosyl-L-methionine:24-methylenelophenol C-methyltransferase

Comments: This is the second methylation step of plant sterol biosynthesis (cf EC, cycloartenol 24-C-methyltransferase).

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 67165-89-3


1. Bouvier-Navé, P., Husselstein, T. and Benveniste, P. Two families of sterol methyltransferases are involved in the first and the second methylation steps of plant biosynthesis. Eur. J. Biochem. 256 (1998) 88-96. [PMID: 9746350]

[EC created 2001]

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