FUNCTION: Pre-mRNA-binding protein required for splicing of both U2- and U12-type introns. Selectively interacts with the 3'-splice site of U2- and U12-type pre-mRNAs and promotes different steps in U2 and U12 intron splicing. Recruited to U12 pre-mRNAs in an ATP-dependent manner and is required for...
FUNCTION: Pre-mRNA-binding protein required for splicing of both U2- and U12-type introns. Selectively interacts with the 3'-splice site of U2- and U12-type pre-mRNAs and promotes different steps in U2 and U12 intron splicing. Recruited to U12 pre-mRNAs in an ATP-dependent manner and is required for assembly of the prespliceosome, a precursor to other spliceosomal complexes. For U2-type introns, it is selectively and specifically required for the second step of splicing. {ECO:0000269|PubMed:21041408, ECO:0000269|PubMed:9237760}.
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GO - Biological processes (BP):
mRNA splicing, via spliceosome [GO:0000398]; RNA splicing [GO:0008380]; spliceosomal complex assembly [GO:0000245]...
mRNA splicing, via spliceosome [GO:0000398]; RNA splicing [GO:0008380]; spliceosomal complex assembly [GO:0000245]
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GO - Molecular function (MF):
identical protein binding [GO:0042802]; metal ion binding [GO:0046872]; pre-mRNA 3'-splice site binding [GO:0030628]...
identical protein binding [GO:0042802]; metal ion binding [GO:0046872]; pre-mRNA 3'-splice site binding [GO:0030628]
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GO - Cellular component (CC):
nucleoplasm [GO:0005654]; spliceosomal complex [GO:0005681]; U12-type spliceosomal complex [GO:0005689]; U2AF complex [GO:0089701]...
nucleoplasm [GO:0005654]; spliceosomal complex [GO:0005681]; U12-type spliceosomal complex [GO:0005689]; U2AF complex [GO:0089701]
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