2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase

In enzymology, a 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase is an enzyme that catalyzes the chemical reaction


 * CTP + 2-C-methyl-D-erythritol 4-phosphate $$\rightleftharpoons$$ diphosphate + 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol

Thus, the two substrates of this enzyme are CTP and 2-C-methyl-D-erythritol 4-phosphate, whereas its two products are diphosphate and 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol.

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is CTP:2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase. This enzyme is also called MEP cytidylyltransferase. This enzyme participates in biosynthesis of steroids.

Structural studies
As of late 2007, 9 structures have been solved for this class of enzymes, with PDB accession codes, , , , , , , , and.