SNRPG

The protein encoded by this gene is a component of the U1, U2, U4, and U5 small nuclear ribonucleoprotein complexes, precursors of the spliceosome. The encoded protein may also be a part of the U7 small nuclear ribonucleoprotein complex, which participates in the processing of the 3' end of histone transcripts. Several transcript variants encoding different isoforms have been found for this gene.

Full Name

small nuclear ribonucleoprotein polypeptide G

Function

Plays a role in pre-mRNA splicing as a core component of the spliceosomal U1, U2, U4 and U5 small nuclear ribonucleoproteins (snRNPs), the building blocks of the spliceosome (PubMed:11991638, PubMed:18984161, PubMed:19325628, PubMed:23333303, PubMed:25555158, PubMed:26912367, PubMed:28502770, PubMed:28781166, PubMed:28076346).
Component of both the pre-catalytic spliceosome B complex and activated spliceosome C complexes (PubMed:11991638, PubMed:28502770, PubMed:28781166, PubMed:28076346).
Is also a component of the minor U12 spliceosome (PubMed:15146077).
As part of the U7 snRNP it is involved in histone 3'-end processing (PubMed:12975319).

Biological Process

Biological Process 7-methylguanosine cap hypermethylation1 PublicationIC:ComplexPortal
Biological Process mRNA splicing, via spliceosomeManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process RNA splicingManual Assertion Based On ExperimentTAS:UniProtKB
Biological Process spliceosomal complex assembly1 PublicationNAS:UniProtKB
Biological Process spliceosomal snRNP assemblyManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process U2-type prespliceosome assembly1 PublicationIC:ComplexPortal

Cellular Location

Cytoplasm, cytosol
Nucleus
SMN-mediated assembly into core snRNPs occurs in the cytosol before SMN-mediated transport to the nucleus to be included in spliceosomes.