Monomer and component of the SFPQ-NONO complex, which is probably a heterotetramer of two 52 kDa (NONO) and two 100 kDa (SFPQ) subunits. SFPQ is a component of spliceosome and U5.4/6 snRNP complexes. Interacts with SNRPA/U1A. Component of a snRNP-free complex with SNRPA/U1A. Part of complex consisting of SFPQ, NONO and MATR3. Interacts with polypyrimidine tract-binding protein 1/PTB. Part of a complex consisting of SFPQ, NONO and NR5A1. Interacts with RXRA, probably THRA, and SIN3A. Interacts with TOP1. Part of a complex consisting of SFPQ, NONO and TOP1. Interacts with SNRNP70 in apoptotic cells (By similarity). Interacts with PSPC1. Interacts with RNF43 (By similarity). Interacts with PITX3 and NR4A2/NURR1.
Function:
DNA- and RNA binding protein, involved in several nuclear processes. Essential pre-mRNA splicing factor required early in spliceosome formation and for splicing catalytic step II, probably as an heteromer with NONO. Binds to pre-mRNA in spliceosome C complex, and specifically binds to intronic polypyrimidine tracts. Interacts with U5 snRNA, probably by binding to a purine-rich sequence located on the 3' side of U5 snRNA stem 1b. May be involved in a pre-mRNA coupled splicing and polyadenylation process as component of a snRNP-free complex with SNRPA/U1A. The SFPQ-NONO heteromer associated with MATR3 may play a role in nuclear retention of defective RNAs. SFPQ may be involved in homologous DNA pairing; in vitro, promotes the invasion of ssDNA between a duplex DNA and produces a D-loop formation. The SFPQ-NONO heteromer may be involved in DNA unwinding by modulating the function of topoisomerase I/TOP1; in vitro, stimulates dissociation of TOP1 from DNA after cleavage and enhances its jumping between separate DNA helices. The SFPQ-NONO heteromer may be involved in DNA nonhomologous end joining (NHEJ) required for double-strand break repair and V(D)J recombination and may stabilize paired DNA ends; in vitro, the complex strongly stimulates DNA end joining, binds directly to the DNA substrates and cooperates with the Ku70/G22P1-Ku80/XRCC5 (Ku) dimer to establish a functional preligation complex. SFPQ is involved in transcriptional regulation. Transcriptional repression is probably mediated by an interaction of SFPQ with SIN3A and subsequent recruitment of histone deacetylases (HDACs). The SFPQ-NONO-NR5A1 complex binds to the CYP17 promoter and regulates basal and cAMP-dependent transcriptional avtivity. SFPQ isoform Long binds to the DNA binding domains (DBD) of nuclear hormone receptors, like RXRA and probably THRA, and acts as transcriptional corepressor in absence of hormone ligands. Binds the DNA sequence 5'-CTGAGTC-3' in the insulin-like growth factor response element (IGFRE) and inhibits IGF-I-stimulated transcriptional activity.
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 198-580;PROTEIN SEQUENCE OF 20-30; 47-55 AND 210-238
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PROTEIN SEQUENCE OF 291-306; 312-322; 358-368 AND 472-485;IDENTIFICATION BY MASS SPECTROMETRY
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-679;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: FUNCTION IN CIRCADIAN RHYTHMS;IDENTIFICATION IN A LARGE PER COMPLEX;SUBCELLULAR LOCATION
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: ACETYLATION [LARGE SCALE ANALYSIS] AT LYS-200;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
Vaild Sequence:
