SF3B5

SF3B5, also known as SF3B5 or SFRS5, is a gene that encodes a subunit of the splicing factor 3B complex. This complex is essential for the assembly of the spliceosome, the molecular machinery responsible for pre-mRNA splicing in eukaryotes. Splicing is a critical step in gene expression, where non-coding regions (introns) are removed from a precursor messenger RNA (pre-mRNA) molecule, and the remaining coding regions (exons) are joined together to form mature mRNA.

The SF3B5 protein plays a crucial role in the recognition of splice sites, specifically the branch point sequence within the intron, which is essential for the initiation of splicing. Mutations or alterations in SF3B5 have been linked to various cellular processes and diseases. For instance, dysregulation of SF3B5 has been observed in certain types of cancer, where aberrant splicing can lead to the production of proteins with altered functions, potentially contributing to tumor growth and progression. Research into SF3B5 is ongoing to better understand its precise functions in splicing and its implications in human health and disease.