Polycomb Complex Protein BMI-1 (BMI-1) Antibody – Rabbit Polyclonal

This locus represents naturally occurring read-through transcription between the neighboring COMM domain-containing protein 3 and polycomb complex protein BMI-1 genes on chromosome 10. The read-through transcript produces a fusion protein that shares sequence identity with each individual gene product. [provided by RefSeq, Feb 2011]

BMI1: Component of a Polycomb group (PcG) multiprotein PRC1- like complex, a complex class required to maintain the transcriptionally repressive state of many genes, including Hox genes, throughout development. PcG PRC1 complex acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-119', rendering chromatin heritably changed in its expressibility. In the PRC1 complex, it is required to stimulate the E3 ubiquitin-protein ligase activity of RNF2/RING2. Component of a PRC1-like complex. Interacts with RING1 and RING2. Interacts vwith CBX7 and CBX8. Interacts with SPOP. Part of a complex consisting of BMI1, CUL3 and SPOP. Interacts with E4F1.

Protein type: Ubiquitin conjugating system; Motility/polarity/chemotaxis; Ubiquitin ligase; Oncoprotein; Ligase; EC 6.3.2.-

Chromosomal Location of Human Ortholog: 10p11.23

Cellular Component: cytoplasm; nucleoplasm; nucleus; PcG protein complex; ubiquitin ligase complex

Molecular Function: protein binding; zinc ion binding

Biological Process: cellular protein metabolic process; chromatin modification; hemopoiesis; negative regulation of transcription from RNA polymerase II promoter; positive regulation of fibroblast proliferation; positive regulation of ubiquitin-protein ligase activity; post-translational protein modification; protein sumoylation; regulation of gene expression; segment specification; transcription, DNA-dependent