The Enzyme Database

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Accepted name: 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase
Reaction: 2-phospho-4-(cytidine 5′-diphospho)-2-C-methyl-D-erythritol = 2-C-methyl-D-erythritol 2,4-cyclodiphosphate + CMP
For diagram of non-mevalonate terpenoid biosynthesis, click here
Other name(s): MECDP-synthase; 2-phospho-4-(cytidine 5′-diphospho)-2-C-methyl-D-erythritol CMP-lyase (cyclizing)
Systematic name: 2-phospho-4-(cytidine 5′-diphospho)-2-C-methyl-D-erythritol CMP-lyase (cyclizing; 2-C-methyl-D-erythritol 2,4-cyclodiphosphate-forming)
Comments: The enzyme from Escherichia coli requires Mg2+ or Mn2+. Forms part of an alternative nonmevalonate pathway for terpenoid biosynthesis (for diagram, click here).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 287480-92-6
1.  Herz, S., Wungsintaweekul, J., Schuhr, C.A., Hecht, S., Lüttgen, H., Sagner, S., Fellermeier, M., Eisenreich, W., Zenk, M.H., Bacher, A. and Rohdich, F. Biosynthesis of terpenoids: YgbB protein converts 4-diphosphocytidyl-2C-methyl-D-erithritol 2-phosphate to 2-C-methyl-D-erithritol 2,4-cyclodiphosphate. Proc. Natl. Acad. Sci. USA 97 (2000) 2486–2490. [PMID: 10694574]
2.  Takagi, M., Kuzuyama, T., Kaneda, K., Watanabe, H., Dairi, T. and Seto, H. Studies on the nonmevalonate pathway: Formation of 2-C-methyl-D-erythritol 2,4-cyclodiphosphate from 2-phospho-4-(cytidine 5′-diphospho)-2-C-methyl-D-erythritol. Tetrahedron Lett. 41 (2000) 3395–3398.
[EC created 2001]

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