DCP1A

Decapping is a key step in general and regulated mRNA decay. The protein encoded by this gene is a decapping enzyme. This protein and another decapping enzyme form a decapping complex, which interacts with the nonsense-mediated decay factor hUpf1 and may be recruited to mRNAs containing premature termination codons. This protein also participates in the TGF-beta signaling pathway. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Feb 2014]

Full Name

Decapping MRNA 1A

Function

Necessary for the degradation of mRNAs, both in normal mRNA turnover and in nonsense-mediated mRNA decay. Removes the 7-methyl guanine cap structure from mRNA molecules, yielding a 5'-phosphorylated mRNA fragment and 7m-GDP. Contributes to the transactivation of target genes after stimulation by TGFB1.

Biological Process

Deadenylation-dependent decapping of nuclear-transcribed mRNA Source: GO_Central
Deadenylation-independent decapping of nuclear-transcribed mRNA Source: GO_Central
Exonucleolytic catabolism of deadenylated mRNA Source: Reactome
Nuclear-transcribed mRNA catabolic process, nonsense-mediated decay Source: Reactome
Positive regulation of catalytic activity Source: InterPro
Protein localization to cytoplasmic stress granule Source: AgBase
Regulation of mRNA stability Source: Reactome

Cellular Location

Nucleus; P-body. Co-localizes with NANOS3 in the processing bodies (By similarity). Predominantly cytoplasmic, in processing bodies (PB) (PubMed:16364915). Nuclear, after TGFB1 treatment. Translocation to the nucleus depends on interaction with SMAD4 (PubMed:11836524).