Splice factor that binds to the single stranded 3'AG at the exon/intron border and promotes its utilization in the second catalytic step. Involved in the regulation of alternative splicing and the utilization of cryptic splice sites. Promotes the utilization of a cryptic splice site created by the beta-110 mutation in the HBB gene. The resulting frameshift leads to sickle cell anemia. Note: This description may include information from UniProtKB.
Protein type: RNA splicing; Spliceosome; RNA binding protein
Chromosomal Location of Human Ortholog: 10p15.1
Cellular Component: nucleoplasm; spliceosome
Molecular Function: protein binding; RNA binding; nucleotide binding
Biological Process: alternative nuclear mRNA splicing, via spliceosome
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.