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EC 2.3.1.199 Details
EC number
2.3.1.199
Accepted name
very-long-chain 3-oxoacyl-CoA synthase
Reaction
a very-long-chain acyl-CoA + malonyl-CoA = a very-long-chain 3-oxoacyl-CoA + CO2 + CoA
Other name(s)
very-long-chain 3-ketoacyl-CoA synthase, very-long-chain β-ketoacyl-CoA synthase, condensing enzyme (ambiguous), CUT1 (gene name), CER6 (gene name), FAE1 (gene name), KCS (gene name), ELO (gene name)
Systematic name
malonyl-CoA:very-long-chain acyl-CoA malonyltransferase (decarboxylating and thioester-hydrolysing)
Comment
This is the first component of the elongase, a microsomal protein complex responsible for extending palmitoyl-CoA and stearoyl-CoA (and modified forms thereof) to very-long-chain acyl CoAs. Multiple forms exist with differing preferences for the substrate, and thus the specific form expressed determines the local composition of very-long-chain fatty acids [6,7]. For example, the FAE1 form from the plant Arabidopsis thaliana accepts only 16 and 18 carbon substrates, with oleoyl-CoA (18:1) being the preferred substrate [5], while CER6 from the same plant prefers substrates with chain length of C22 to C32 [4,8]. cf. EC 1.1.1.330, very-long-chain 3-oxoacyl-CoA reductase, EC 4.2.1.134, very-long-chain (3R)-3-hydroxyacyl-[acyl-carrier protein] dehydratase, and EC 1.3.1.93, very-long-chain enoyl-CoA reductase
History
created 2012
EC Tree
2.3.1.55 created 1976, deleted 1999
2.3.1.120 created 1990, deleted 1992
2.3.1.124 created 1990, deleted 1992