Download MendeleyStructural Insight into Binding of the ZZ Domain of HERC2 to Histone H3 and SUMO1.
Liu, J., Xue, Z., Zhang, Y., Vann, K.R., Shi, X., Kutateladze, T.G.(2020) Structure 28: 1225-1230.e3
- PubMed: 32726574
- DOI: https://doi.org/10.1016/j.str.2020.07.003
- PubMed Abstract:
Human ubiquitin ligase HERC2, a component of the DNA repair machinery, has been linked to neurological diseases and cancer. Here, we show that the ZZ domain of HERC2 (HERC2 ZZ ) binds to histone H3 tail and tolerates posttranslational modifications commonly present in H3. The crystal structure of the HERC2 ZZ :H3 complex provides the molecular basis for this interaction and highlights a critical role of the negatively charged site of HERC2 ZZ in capturing of A1 of H3. NMR, mutagenesis, and fluorescence data reveal that HERC2 ZZ binds to H3 and the N-terminal tail of SUMO1, a previously reported ligand of HERC2 ZZ , with comparable affinities. Like H3, the N-terminal tail of SUMO1 occupies the same negatively charged site of HERC2 ZZ in the crystal structure of the complex, although in contrast to H3 it adopts an α-helical conformation. Our data suggest that HERC2 ZZ may play a role in mediating the association of HERC2 with chromatin.
Organizational Affiliation:
Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA.
