Anti-splicing factor 1/SF1 Antibody Picoband® Fluoro488 Conjugated

Splicing factor 1 also known as zinc finger protein 162 (ZFM162) is a protein that in humans is encoded by the SF1 gene. This gene encodes a nuclear pre-mRNA splicing factor. The encoded protein specifically recognizes the intron branch point sequence at the 3' splice site, together with the large subunit of U2 auxiliary factor (U2AF), and is required for the early stages of spliceosome assembly. It also plays a role in nuclear pre-mRNA retention and transcriptional repression. The encoded protein contains an N-terminal U2AF ligand motif, a central hnRNP K homology motif and quaking 2 region which bind a key branch-site adenosine within the branch point sequence, a zinc knuckles domain, and a C-terminal proline-rich domain. Alternative splicing results in multiple transcript variants.

Splicing factor 1; Mammalian branch point-binding protein; BBP; mBBP; Transcription factor ZFM1; Zinc finger gene in MEN1 locus; Zinc finger protein 162; SF1; ZFM1, ZNF162

Necessary for the ATP-dependent first step of spliceosome assembly. Binds to the intron branch point sequence (BPS) 5'-UACUAAC-3' of the pre-mRNA. May act as transcription repressor.

1. Toda, T., Iida, A., Miwa, T., Nakamura, Y., Imai, T. Isolation and characterization of a novel gene encoding nuclear protein at a locus (D11S636) tightly linked to multiple endocrine neoplasia type 1 (MEN1) . Hum. Molec. Genet. 3: 465-470, 1994. 2. Caslini, C., Spinelli, O., Cazzaniga, G., Golay, J., De Gioia, L., Pedretti, A., Breviario, F., Amaru, R., Barbui, T., Biondi, A., Introna, M., Rambaldi, A. Identification of two novel isoforms of the ZNF162 gene: a growing family of signal transduction and activator of RNA proteins. Genomics 42: 268-277, 1997.