Primary Citation of Related Structures: 6WW3, 6WW4
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 ...
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. Electronic address: tatiana.kutateladze@cuanschutz.edu.
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