Using site-specific chemical crosslinking strategies, Ai, Tong and Deng et al. captured structural intermediates of ubiquitin E3 ligase RNF168-mediated H2A K13 and K15 monoubiquitination and adjacent dual monoubiquitination in the DNA damage repair response; the structural analysis revealed a helix-anchoring mechanism.
- Huasong Ai
- Zebin Tong
- Man Pan