RING1 Antibody – Mouse Monoclonal

RING1: Constitutes one of the E3 ubiquitin-protein ligases that mediate monoubiquitination of 'Lys-119' of histone H2A, thereby playing a central role in histone code and gene regulation. H2A 'Lys-119' ubiquitination gives a specific tag for epigenetic transcriptional repression and participates in X chromosome inactivation of female mammals. Essential 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, rendering chromatin heritably changed in its expressibility. Compared to RNF2/RING2, it does not have the main E3 ubiquitin ligase activity on histone H2A, and it may rather act as a modulator of RNF2/RING2 activity. Component of chromatin-associated Polycomb (PcG) complexes. Interacts with BMI1. Part of the E2F6.com-1 complex in G0 phase composed of E2F6, MGA, MAX, TFDP1, CBX3, BAT8, EUHMTASE1, RING1, RNF2/RING2 MBLR, L3MBTL2 and YAF2. Interacts with CBX2 and PCGF6. Component of a PRC1-like complex. Component of repressive BCOR complex containing Polycomb group subcomplex at least composed of RYBP, PCGF1, BCOR and RNF2/RING2. Interacts with PCGF2, RNF2; CBX6, CBX7 and CBX8. Interacts with PHC2. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Ligase; Transcription factor; EC 6.3.2.-; EC 6.3.2.19; Ubiquitin conjugating system; Ubiquitin ligase

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: nucleoplasm; sex chromatin; cytoplasm; nuclear speck; PcG protein complex; nucleus

Molecular Function: protein binding; zinc ion binding; ubiquitin-protein ligase activity; chromatin binding; ligase activity

Biological Process: anterior/posterior pattern formation; camera-type eye morphogenesis; transcription, DNA-dependent; negative regulation of transcription, DNA-dependent