SF3B4 — Splicing factor 3b subunit 4
SF3B4 belongs to a gene co-expression module in 1 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
SF3B4's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| Gamma-delta T cells | Proteasome Complex Protein processing & ER | APH1A, EIF3I, JTB, MRPL27, PSMB6, PSMB7, PSMC1, PSMC3 +4 more |
About the gene
| Synonyms | Hsh49, SAP49, SF3b49 |
|---|---|
| Chromosome | 1: 149923317-149927803 |
| Predicted location | Intracellular |
| Essential gene | Yes |
| Protein class | Disease related genes, Essential proteins, Human disease related genes, Plasma proteins, Predicted intracellular proteins |
| Molecular function | RNA-binding |
| Biological process | mRNA processing, mRNA splicing |
Function
Component of the 17S U2 SnRNP complex of the spliceosome, a large ribonucleoprotein complex that removes introns from transcribed pre-mRNAs. The 17S U2 SnRNP complex (1) directly participates in early spliceosome assembly and (2) mediates recognition of the intron branch site during pre-mRNA splicing by promoting the selection of the pre-mRNA branch-site adenosine, the nucleophile for the first step of splicing. Within the 17S U2 SnRNP complex, SF3B4 is part of the SF3B subcomplex, which is required for 'A' complex assembly formed by the stable binding of U2 snRNP to the branchpoint sequence in pre-mRNA. Sequence independent binding of SF3A and SF3B subcomplexes 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. Also acts as a component of the minor spliceosome, which is involved in the splicing of U12-type introns in pre-mRNAs.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.