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Molecular characterization of substrate-induced ubiquitin transfer by UBR7-PHD finger, a newly identified histone H2BK120 ubiquitin ligase

FEBS J. 2021-11; 
Anirban Dasgupta, Payel Mondal, Sambit Dalui, Chandrima Das, Siddhartha Roy
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Recombinant Proteins … 1) All experimental points of the observed isotherms were fitted by … Circular dichroism spectra were recorded by using a JASCO J-815 spectropolarimeter (Jasco) equipped … (GenScript #A01704) followed by incubating with Protein A sepharose beads (GE Healthcare). The beads … Get A Quote


Monoubiquitination of histone H2B at lysine 120 plays a vital role in active transcription and DNA damage response pathways. Ubiquitin protein ligase E3 component N-recognin 7 (UBR7) has been recently identified as an H2BK120 monoubiquitin ligase. However, the molecular details of its ubiquitin transfer mechanism are not well understood. Here, we report that the plant homeodomain (PHD) finger of UBR7 is essential for its association with E2 UbcH6 and consequent ubiquitin transfer to its substrate histone H2B. We also identified the critical region of UbcH6 involved in this function and shown that the residues stretching from 114 to 125 of histone H2B C-terminal tail are sufficient for UBR7/UbcH6-mediated ubiqui... More


E3 ligase, PHD finger, chromatin, monoubiquitination, oligomerization