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 inb 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. Recruited to the MDM2 promoter, probably by being recruited by p53/TP53, and thereby acts as a transcriptional coactivator. Mediates the polyubiquitination of isoform 2 of PA2G4 in cancer cells leading to its proteasome-mediated degradation.
Expressed in the normal brain and also in malignant gliomas (at protein level).
Protein modification; protein ubiquitination.
Belongs to the BRE1 family. Contains 1 RING-type zinc finger.
Immonofluorescence analysis of 4% paraformaldehyde fixed MCF7 cells, labeling RNF20 using ab181104 at a 1/250 dilution (green) followed by Goat anti rabbit IgG (Alexa Fluor® 488) secondary antibody at a 1/2000 dilution and counterstained with Dapi (blue).
Flow cytometry analysis of 2% paraformaldehyde fixed Jurkat cells labeling RNF20 with ab181104 at 1/290 dilution (red) or a Rabbit monoclonal IgG Isotype control (green), followed by Goat anti rabbit IgG (FITC) at a 1/150 dilution.
Western blot analysis on immunoprecipitation of 293 cell lysate labeling RNF20 using ab181104 at a 1/50 dilution and Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated at a 1/1000 dilution and 5% NFDM/TBST blocking peptide.
Western blot - Anti-RNF20 antibody [EPR13562(B)] (ab181104)
All lanes : Anti-RNF20 antibody [EPR13562(B)] (ab181104) at 1/5000 dilution
Lane 1 : Jurkat cell lysate Lane 2 : 293 cell lysate Lane 3 : MCF7 cell lysate Lane 4 : HeLa cell lysate
Lysates/proteins at 20 µg per lane.
Secondary All lanes : Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated at 1/1000 dilution