FUNCTION: 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 ...
FUNCTION: 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. {ECO:0000269|PubMed:16359901}.
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GO - Biological processes (BP):
anterior/posterior pattern specification [GO:0009952]; camera-type eye morphogenesis [GO:0048593]; chromatin organization [GO:0006325]; histone H2A monoubiquitination [GO:0035518]; negative regulation of transcription, DNA-templated [GO:0045892]...
anterior/posterior pattern specification [GO:0009952]; camera-type eye morphogenesis [GO:0048593]; chromatin organization [GO:0006325]; histone H2A monoubiquitination [GO:0035518]; negative regulation of transcription, DNA-templated [GO:0045892]
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GO - Molecular function (MF):
chromatin binding [GO:0003682]; metal ion binding [GO:0046872]; ubiquitin protein ligase activity [GO:0061630]; ubiquitin-protein transferase activator activity [GO:0097027]...
chromatin binding [GO:0003682]; metal ion binding [GO:0046872]; ubiquitin protein ligase activity [GO:0061630]; ubiquitin-protein transferase activator activity [GO:0097027]
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GO - Cellular component (CC):
cytosol [GO:0005829]; nuclear speck [GO:0016607]; nucleoplasm [GO:0005654]; nucleus [GO:0005634]; PcG protein complex [GO:0031519]; PRC1 complex [GO:0035102]; sex chromatin [GO:0001739]; ubiquitin ligase complex [GO:0000151]...
cytosol [GO:0005829]; nuclear speck [GO:0016607]; nucleoplasm [GO:0005654]; nucleus [GO:0005634]; PcG protein complex [GO:0031519]; PRC1 complex [GO:0035102]; sex chromatin [GO:0001739]; ubiquitin ligase complex [GO:0000151]
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