2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase

2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase
Identifiers
EC number	4.6.1.12
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / EGO
Search PMC articles PubMed articles NCBI proteins

2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase (MEcPP synthase, IspF, EC 4.6.1.12) is a zinc-dependent enzyme which participates in the MEP pathway (non-mevalonate pathway) of isoprenoid precursor biosynthesis. It catalyzes the chemical reaction:

4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate $\rightleftharpoons$ 2-C-methyl-D-erythritol 2,4-cyclodiphosphate + CMP

Hence, this enzyme has one substrate, 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate (CDP-MEP), and two products, 2-C-methyl-D-erythritol 2,4-cyclodiphosphate (MEcPP) and CMP.

The enzyme is considered a phosphorus-oxygen lyase. The systematic name of this enzyme class is 2-phospho-4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol CMP-lyase (cyclizing; 2-C-methyl-D-erythritol 2,4-cyclodiphosphate-forming). Other names in common use include IspF, YgbB and MEcPP synthase.

Structural studies

As of late 2007, 20 structures have been solved for this class of enzymes, with PDB accession codes 1GX1, 1H47, 1H48, 1IV1, 1IV2, 1IV3, 1IV4, 1T0A, 1U3L, 1U3P, 1U40, 1U43, 1VH8, 1VHA, 1W55, 1W57, 1YQN, 2AMT, 2GZL, and 2PMP.