IUBMB Enzyme Nomenclature


Accepted name: 5'-(N7-methylguanosine 5'-triphospho)-[mRNA] hydrolase

Reaction: a 5'-(N7-methylguanosine 5'-triphospho)-[mRNA] + H2O = N7-methylguanosine 5'-diphosphate + a 5'-phospho-[mRNA]

Glossary: N7-methylguanosine 5'-diphosphate = m7GDP

Other name(s): Dcp2; NUDT16; D10 protein; D9 protein; D10 decapping enzyme; decapping enzyme; m7GpppN-mRNA hydrolase; m7GpppN-mRNA m7GDP phosphohydrolase

Systematic name: 5'-(N7-methylguanosine 5'-triphospho)-[mRNA] N7-methylguanosine-5'-diphosphate phosphohydrolase

Comments: Decapping of mRNA is a critical step in eukaryotic mRNA turnover. The enzyme is unable to cleave a free cap structure (m7GpppG) [3]. The enzyme from Vaccinia virus is synergistically activated in the presence of Mg2+ and Mn2+ [5].

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


1. Xu, J., Yang, J.Y., Niu, Q.W. and Chua, N.H. Arabidopsis DCP2, DCP1, and VARICOSE form a decapping complex required for postembryonic development. Plant Cell 18 (2006) 3386-3398. [PMID: 17158604]

2. Lu, G., Zhang, J., Li, Y., Li, Z., Zhang, N., Xu, X., Wang, T., Guan, Z., Gao, G.F. and Yan, J. hNUDT16: a universal decapping enzyme for small nucleolar RNA and cytoplasmic mRNA. Protein Cell 2 (2011) 64-73. [PMID: 21337011]

3. van Dijk, E., Cougot, N., Meyer, S., Babajko, S., Wahle, E. and Seraphin, B. Human Dcp2: a catalytically active mRNA decapping enzyme located in specific cytoplasmic structures. EMBO J. 21 (2002) 6915-6924. [PMID: 12486012]

4. Parrish, S., Resch, W. and Moss, B. Vaccinia virus D10 protein has mRNA decapping activity, providing a mechanism for control of host and viral gene expression. Proc. Natl. Acad. Sci. USA 104 (2007) 2139-2144. [PMID: 17283339]

5. Souliere, M.F., Perreault, J.P. and Bisaillon, M. Characterization of the vaccinia virus D10 decapping enzyme provides evidence for a two-metal-ion mechanism. Biochem. J. 420 (2009) 27-35. [PMID: 19210265]

6. Parrish, S. and Moss, B. Characterization of a second vaccinia virus mRNA-decapping enzyme conserved in poxviruses. J. Virol. 81 (2007) 12973-12978. [PMID: 17881455]

7. Song, M.G., Li, Y. and Kiledjian, M. Multiple mRNA decapping enzymes in mammalian cells. Mol. Cell 40 (2010) 423-432. [PMID: 21070968]

[EC created 2012, modified 2013]

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