Serine/arginine repetitive matrix protein 1 (SRRM1)

Part of pre- and post-splicing multiprotein mRNP complexes. Involved in numerous pre-mRNA processing events.

Promotes constitutive and exonic splicing enhancer (ESE)-dependent splicing activation by bridging together sequence-specific (SR family proteins, SFRS4, SFRS5 and TRA2B/SFRS10) and basal snRNP (SNRP70 and SNRPA1) variables of the spliceosome. Stimulates mRNA 3'-end cleavage independently of the formation of an exon junction complex.