background:
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) factors of the spliceosome. Stimulates mRNA 3'-end cleavage independently of the formation of an exon junction complex. Binds both pre-mRNA and spliced mRNA 20-25 nt upstream of exon-exon junctions. Binds RNA and DNA with low sequence specificity and has similar preference for either double- or single-stranded nucleic acid substrates.
Function:
Part of pre- and post-splicing multiprotein mRNPcomplexes. Involved in numerous pre-mRNA processing events.Promotes constitutive and exonic splicing enhancer (ESE)-dependentsplicing activation by bridging together sequence-specific (SRfamily proteins, SFRS4, SFRS5 and TRA2B/SFRS10) and basal snRNP(SNRP70 and SNRPA1) factors of the spliceosome. Stimulates mRNA3'-end cleavage independently of the formation of an exon junctioncomplex. Binds both pre-mRNA and spliced mRNA 20-25 nt upstream ofexon-exon junctions. Binds RNA and DNA with low sequencespecificity and has similar preference for either double- orsingle-stranded nucleic acid substrates.
Subunit:
Identified in the spliceosome C complex. Found in apre-mRNA splicing complex with SFRS4, SFRS5, SNRP70, SNRPA1, SRRM1and SRRM2. Found in a pre-mRNA exonic splicing enhancer (ESE)complex with SNRP70, SNRPA1, SRRM1 and TRA2B/SFRS10. Found in amRNA splicing-dependent exon junction complex (EJC) with DEK,PRPF8, NCBP1, RBM8A, RNPS1, SRRM1 and ALYREF/THOC4. Interacts withBAT1, CPSF1, RBM8A, RNPS1, and ALYREF/THOC4. Seems to be a compoundof RNA export complexes that are released from speckles in aATP-dependent manner.
Subcellular Location:
Nucleus matrix. Nucleus speckle.
Similarity:
Belongs to the splicing factor SR family.
Contains 1 PWI domain.
Database links:
UniProtKB/Swiss-Prot: Q8IYB3.2
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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