ジャーナル: Nat Struct Mol Biol / 年: 2021 タイトル: Mechanistic insight into substrate processing and allosteric inhibition of human p97. 著者: Man Pan / Yuanyuan Yu / Huasong Ai / Qingyun Zheng / Yuan Xie / Lei Liu / Minglei Zhao / 要旨: p97 processes ubiquitinated substrates and plays a central role in cellular protein homeostasis. Here, we report a series of cryo-EM structures of the substrate-engaged human p97 complex with ...p97 processes ubiquitinated substrates and plays a central role in cellular protein homeostasis. Here, we report a series of cryo-EM structures of the substrate-engaged human p97 complex with resolutions ranging from 2.9 to 3.8 Å that captured 'power-stroke'-like motions of both the D1 and D2 ATPase rings of p97. A key feature of these structures is the critical conformational changes of the intersubunit signaling (ISS) motifs, which tighten the binding of nucleotides and neighboring subunits and contribute to the spiral staircase conformation of the D1 and D2 rings. In addition, we determined the cryo-EM structure of human p97 in complex with NMS-873, a potent p97 inhibitor, at a resolution of 2.4 Å. The structures showed that NMS-873 binds at a cryptic groove in the D2 domain and interacts with the ISS motif, preventing its conformational change and thus blocking substrate translocation allosterically.
全体 : Human p97 in complex with Npl4/Ufd1 and polyubiquitinated Ub-Eos ...
全体
名称: Human p97 in complex with Npl4/Ufd1 and polyubiquitinated Ub-Eos in the presence of ATP and sub-stoichiometric NMS-873
要素
複合体: Human p97 in complex with Npl4/Ufd1 and polyubiquitinated Ub-Eos in the presence of ATP and sub-stoichiometric NMS-873
タンパク質・ペプチド: Human p97 (A232E/E578Q)
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超分子 #1: Human p97 in complex with Npl4/Ufd1 and polyubiquitinated Ub-Eos ...
超分子
名称: Human p97 in complex with Npl4/Ufd1 and polyubiquitinated Ub-Eos in the presence of ATP and sub-stoichiometric NMS-873 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all