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2.1.1.41: sterol 24-C-methyltransferase

This is an abbreviated version!
For detailed information about sterol 24-C-methyltransferase, go to the full flat file.

Word Map on EC 2.1.1.41

Reaction

S-adenosyl-L-methionine
+
5alpha-cholesta-8,24-dien-3beta-ol
=
S-adenosyl-L-homocysteine
+
24-methylene-5alpha-cholest-8-en-3beta-ol

Synonyms

(S)-adenosyl-L-methionine:DELTA24(25)-sterol methyl transferase, 24-C-sterol methyltransferase, 24-SMT, 24-sterol C-methyltransferase, C-24 sterol methyltransferase, C24-methyltransferase, DELTA(24,25)-SMT, DELTA24-methyltransferase, DELTA24-sterol methyltransferase, Erg6, Erg6p, LMJF_36_2380, LMJF_36_2390, methyltransferase, DELTA24-sterol, PbSMT, phytosterol methyltransferase, S-adenosyl-4-methionine:sterol DELTA24-methyltransferase, S-adenosyl-L-methionine:DELTA24(23)-sterol methyltransferase, SAM:SMT, SMT, SMT protein, SMT1, SMT80, SMT90, sterol 24-C-methyltransferase, sterol C24-methyltransferase, sterol methyltransferase, STM, TbSMT, zymosterol 24-methyltransferase, zymosterol-24-methyltransferase

ECTree

     2 Transferases
         2.1 Transferring one-carbon groups
             2.1.1 Methyltransferases
                2.1.1.41 sterol 24-C-methyltransferase

Systematic Name

Systematic Name on EC 2.1.1.41 - sterol 24-C-methyltransferase

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SYSTEMATIC NAME
IUBMB Comments
S-adenosyl-L-methionine:zymosterol 24-C-methyltransferase
Requires glutathione. Acts on a range of sterols with a 24(25)-double bond in the sidechain. While zymosterol is the preferred substrate it also acts on desmosterol, 5alpha-cholesta-7,24-dien-3beta-ol, 5alpha-cholesta-5,7,24-trien-3beta-ol, 4alpha-methylzymosterol and others. S-Adenosyl-L-methionine attacks the Si-face of the 24(25) double bond and the C-24 hydrogen is transferred to C-25 on the Re face of the double bond.