PTBP1 Rabbit Polyclonal Antibody

Function

Polypyrimidine tract-binding protein 1 is a protein that in humans is encoded by the PTBP1 gene. It plays a role in pre-mRNA splicing and in the regulation of alternative splicing events. PTBP1 activates exon skipping of its own pre-mRNA during muscle cell differentiation. It binds to the polypyrimidine tract of introns and may promote RNA looping when bound to two separate polypyrimidine tracts in the same pre-mRNA. PTBP1 may promote the binding of U2 snRNP to pre-mRNA. It cooperates with RAVER1 to modulate switching between mutually exclusive exons during maturation of the TPM1 pre-mRNA. Represses the splicing of MAPT/Tau exon 10.

Background References

1. "Structure of PTB bound to RNA: specific binding and implications for splicing regulation." Oberstrass F.C., Auweter S.D., Erat M., Hargous Y., Henning A., Wenter P., Reymond L., Amir-Ahmady B., Pitsch S., Black D.L., Allain F.H. Science 309:2054-2057(2005)

2. "Exon selection in alpha-tropomyosin mRNA is regulated by the antagonistic action of RBM4 and PTB." Lin J.C., Tarn W.Y. Mol. Cell. Biol. 25:10111-10121(2005)

3. "RBM4 down-regulates PTB and antagonizes its activity in muscle cell-specific alternative splicing." Lin J.C., Tarn W.Y. J. Cell Biol. 193:509-520(2011)

Subcellular Location

Nucleus

UNIPROT

SwissProt: P26599 Human

SwissProt: P17225 Mouse

SwissProt: Q00438 Rat

Synonyms