Recombinant Human Splicing factor 3B subunit 3 (SF3B3), Truncated

Uniprot Id

Q15393

Target Species

Human

Target Name

SF3B3

Target Full Name

Splicing factor 3B subunit 3

Target Function

Involved in pre-mRNA splicing as a component of the splicing factor SF3B complex, a constituent of the spliceosome. SF3B complex is required for 'A' complex assembly formed by the stable binding of U2 snRNP to the branchpoint sequence (BPS) in pre-mRNA. Sequence independent binding of SF3A/SF3B complex upstream of the branch site is essential, it may anchor U2 snRNP to the pre-mRNA. May also be involved in the assembly of the 'E' complex. Belongs also to the minor U12-dependent spliceosome, which is involved in the splicing of rare class of nuclear pre-mRNA intron.

Target Subcellular Location

Nucleus.

Target Protein Families

RSE1 family

Target Research Area

Epigenetics and Nuclear Signaling

Target Synonyms

KIAA0017; Pre mRNA splicing factor SF3b 130 kDa subunit; Pre-mRNA-splicing factor SF3b 130 kDa subunit; RSE1; SAP 130; SAP130 ; SF3b130; SF3B3; SF3B3_HUMAN; Spliceosome associated protein 130 ; Spliceosome-associated protein 130; Splicing factor 3b subunit 3 130kD; Splicing factor 3B subunit 3; STAF130

Target Background

This gene encodes subunit 3 of the splicing factor 3b protein complex. Splicing factor 3b, together with splicing factor 3a and a 12S RNA unit, forms the U2 small nuclear ribonucleoproteins complex (U2 snRNP). The splicing factor 3b/3a complex binds pre-mRNA upstream of the intron's branch site in a sequence independent manner and may anchor the U2 snRNP to the pre-mRNA. Splicing factor 3b is also a component of the minor U12-type spliceosome. Subunit 3 has also been identified as a component of the STAGA (SPT3-TAF(II)31-GCN5L acetylase) transcription coactivator-HAT (histone acetyltransferase) complex, and the TFTC (TATA-binding-protein-free TAF(II)-containing complex). These complexes may function in chromatin modification, transcription, splicing, and DNA repair.