IUBMB Enzyme Nomenclature


Accepted name: triacylglycerol—sterol O-acyltransferase

Reaction: triacylglycerol + a 3β-hydroxysteroid = diacylglycerol + a 3β-hydroxysteroid ester

Other name(s): triacylglycerol:sterol acyltransferase

Systematic name: triacylglycerol:3β-hydroxysteroid O-acyltransferase

Comments: Tripalmitoylglycerol and, more slowly, other triacylglycerols containing C6 to C22 fatty acids, can act as donors. The best acceptors are 3β-hydroxysterols with a planar ring system.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 80487-96-3


1. Zimowski, J. and Wojciechowski, Z.A. Acyl donors for sterol esterification by cell-free preparations from Sinapis alba roots. Phytochemistry 20 (1981) 1799-1803.

[EC created 1984]

Return to EC 2.3.1 home page
Return to EC 2.3 home page
Return to EC 2 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page