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Protein Page:

RNF40 Component of the RNF20/40 E3 ubiquitin-protein ligase complex that mediates monoubiquitination of 'Lys-120' of histone H2B (H2BK120ub1). H2BK120ub1 gives a specific tag for epigenetic transcriptional activation and is also prerequisite for histone H3 'Lys-4' and 'Lys-79' methylation (H3K4me and H3K79me, respectively). It thereby plays a central role in histone code and gene regulation. The RNF20/40 complex forms a H2B ubiquitin ligase complex in cooperation with the E2 enzyme UBE2A or UBE2B; reports about the cooperation with UBE2E1/UBCH are contradictory. Required for transcriptional activation of Hox genes. Component of the RNF20/40 complex (also known as BRE1 complex) probably composed of 2 copies of RNF20/BRE1A and 2 copies of RNF40/BRE1B. Interacts with UBE2E1/UBCH6. Interacts with RB1 and WAC. Ubiquitously expressed. Expressed at higher level in testis, heart and pancreas, while it is only weakly expressed in lung, skeletal muscle and small intestine. Belongs to the BRE1 family. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: EC 6.3.2.-; EC; Ligase; Ubiquitin conjugating system; Ubiquitin ligase
Chromosomal Location of Human Ortholog: 16p11.2
Cellular Component: membrane; neuron projection; nucleoplasm; nucleus; ubiquitin ligase complex
Molecular Function: mRNA 3'-UTR binding; protein binding; protein homodimerization activity; ubiquitin protein ligase binding; ubiquitin-protein ligase activity
Biological Process: histone H2B ubiquitination; histone monoubiquitination; protein ubiquitination; regulation of mitotic cell cycle; ubiquitin-dependent protein catabolic process
Reference #:  O75150 (UniProtKB)
Alt. Names/Synonyms: 95 kDa retinoblastoma protein binding protein; 95 kDa retinoblastoma-associated protein; BRE1 E3 ubiquitin ligase homolog B; BRE1-B; BRE1B; DKFZp686K191; E3 ubiquitin-protein ligase BRE1B; KIAA0661; MGC13051; Rb-associated protein; RBP95; RING finger protein 40; RNF40; STARING
Gene Symbols: RNF40
Molecular weight: 113,650 Da
Basal Isoelectric point: 5.93  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

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