Biology:SF3B3

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A representation of the 3D structure of the protein myoglobin showing turquoise α-helices.
Generic protein structure example

Splicing factor 3B subunit 3 is a protein that in humans is encoded by the SF3B3 gene.[1][2]

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.[2]

Interactions

SF3B3 has been shown to interact with SF3B1,[1][3] Transcription initiation protein SPT3 homolog[4] and TAF9.[4]

References

  1. 1.0 1.1 Das BK; Xia L; Palandjian L; Gozani O; Chyung Y; Reed R (February 2000). "Characterization of a Protein Complex Containing Spliceosomal Proteins SAPs 49, 130, 145, and 155". Mol Cell Biol 19 (10): 6796–802. doi:10.1128/mcb.19.10.6796. PMID 10490618. 
  2. 2.0 2.1 "Entrez Gene: SF3B3 splicing factor 3b, subunit 3, 130kDa". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=23450. 
  3. Will, Cindy L; Urlaub Henning; Achsel Tilmann; Gentzel Marc; Wilm Matthias; Lührmann Reinhard (September 2002). "Characterization of novel SF3b and 17S U2 snRNP proteins, including a human Prp5p homologue and an SF3b DEAD-box protein". EMBO J. 21 (18): 4978–88. doi:10.1093/emboj/cdf480. ISSN 0261-4189. PMID 12234937. 
  4. 4.0 4.1 Martinez, E; Palhan V B; Tjernberg A; Lymar E S; Gamper A M; Kundu T K; Chait B T; Roeder R G (October 2001). "Human STAGA Complex Is a Chromatin-Acetylating Transcription Coactivator That Interacts with Pre-mRNA Splicing and DNA Damage-Binding Factors In Vivo". Mol. Cell. Biol. 21 (20): 6782–95. doi:10.1128/MCB.21.20.6782-6795.2001. ISSN 0270-7306. PMID 11564863. 

Further reading