IUBMB Enzyme Nomenclature


Accepted name: isopentenyl phosphate kinase

Reaction: ATP + 3-methylbut-3-en-1-yl phosphate = ADP + 3-methylbut-3-en-1-yl diphosphate

For reaction pathway click here.

Systematic name: ATP:3-methylbut-3-en-1-yl-phosphate phosphotransferase

Comments: The enzyme is involved in the mevalonate pathway in Archaea [1]. The activity has also been identified in the plant Mentha piperita (peppermint) [2]. It is strictly specific for ATP but can use other phosphate acceptors such as dimethylallyl phosphate, geranyl phosphate, or fosfomycin.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:


1. Grochowski, L.L., Xu, H. and White, R.H. Methanocaldococcus jannaschii uses a modified mevalonate pathway for biosynthesis of isopentenyl diphosphate. J. Bacteriol. 188 (2006) 3192-3198. [PMID: 16621811]

2. Lange, B.M. and Croteau, R. Isopentenyl diphosphate biosynthesis via a mevalonate-independent pathway: isopentenyl monophosphate kinase catalyzes the terminal enzymatic step. Proc. Natl. Acad. Sci. USA 96 (1999) 13714-13719. [PMID: 10570138]

3. Chen, M. and Poulter, C.D. Characterization of thermophilic archaeal isopentenyl phosphate kinases. Biochemistry 49 (2010) 207-217. [PMID: 19928876]

4. Mabanglo, M.F., Schubert, H.L., Chen, M., Hill, C.P. and Poulter, C.D. X-ray structures of isopentenyl phosphate kinase. ACS Chem. Biol. 5 (2010) 517-527. [PMID: 20402538]

[EC created 2012]

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