Decapping metalloenzyme that catalyzes the cleavage of the cap structure on mRNAs. Roves the 7-methyl guanine cap structure from mRNA molecules, yielding a 5'-phosphorylated mRNA fragment and 7m-GDP. Necessary for the degradation of mRNAs, both in normal mRNA turnover and in nonsense-mediated mRNA decay. Plays a role in replication-dependent histone mRNA degradation. Has higher activity towards mRNAs that lack a poly(A) tail. Has no activity towards a cap structure lacking an RNA moiety
Identification of a human decapping complex associated with hUpf proteins in nonsense-mediated decay.Lykke-Andersen J.Mol. Cell. Biol. 22:8114-8121(2002)
Research Topic:Transcription