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ENZYME entry: EC 126.96.36.199
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|Biotin-independent malonate decarboxylase.
|Malonate carboxy-lyase (biotin-independent).|
|Malonate + H(+) <=> acetate + CO(2)|
- Two types of malonate decarboxylase are currently known, both of
which form multienzyme complexes.
- This enzyme is a cytosolic protein that is biotin-independent.
- The other type is a biotin-dependent, Na(+)-translocating enzyme that
includes both soluble and membrane-bound components (cf.
- As free malonate is chemically rather inert, it has to be activated
prior to decarboxylation.
- In both enzymes, this is achieved by exchanging malonate with an
acetyl group bound to an acyl-carrier protiein (ACP), to form
malonyl-ACP and acetate, with subsequent decarboxylation regenerating
- The ACP subunit of both enzymes differs from that found in fatty-acid
biosynthesis by having phosphopantethine attached to a serine side-
chain as 2'-(5-triphosphoribosyl)-3'-dephospho-CoA rather than as
- The individual enzymes involved in carrying out the reaction of this
enzyme complex are EC 188.8.131.52, EC 184.108.40.206 and EC 220.127.116.11.
- The carboxy group is lost with retention of configuration.
|PRIAM enzyme-specific profiles||18.104.22.168|
|KEGG Ligand Database for Enzyme Nomenclature||22.214.171.124|
|IUBMB Enzyme Nomenclature||126.96.36.199|
|MEDLINE||Find literature relating to 188.8.131.52|
entries corresponding to 4.1.1.-
entries corresponding to 4.1.-.-
entries corresponding to 4.-.-.-