+検索条件
-Structure paper
タイトル | Characterizing ATP processing by the AAA+ protein p97 at the atomic level. |
---|---|
ジャーナル・号・ページ | Nat Chem, Vol. 16, Issue 3, Page 363-372, Year 2024 |
掲載日 | 2024年2月7日 |
著者 | Mikhail Shein / Manuel Hitzenberger / Tat Cheung Cheng / Smruti R Rout / Kira D Leitl / Yusuke Sato / Martin Zacharias / Eri Sakata / Anne K Schütz / |
PubMed 要旨 | The human enzyme p97 regulates various cellular pathways by unfolding hundreds of protein substrates in an ATP-dependent manner, making it an essential component of protein homeostasis and an ...The human enzyme p97 regulates various cellular pathways by unfolding hundreds of protein substrates in an ATP-dependent manner, making it an essential component of protein homeostasis and an impactful pharmacological target. The hexameric complex undergoes substantial conformational changes throughout its catalytic cycle. Here we elucidate the molecular motions that occur at the active site in the temporal window immediately before and after ATP hydrolysis by merging cryo-EM, NMR spectroscopy and molecular dynamics simulations. p97 populates a metastable reaction intermediate, the ADP·P state, which is poised between hydrolysis and product release. Detailed snapshots reveal that the active site is finely tuned to trap and eventually discharge the cleaved phosphate. Signalling pathways originating at the active site coordinate the action of the hexamer subunits and couple hydrolysis with allosteric conformational changes. Our multidisciplinary approach enables a glimpse into the sophisticated spatial and temporal orchestration of ATP handling by a prototype AAA+ protein. |
リンク | Nat Chem / PubMed:38326645 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.61 - 3.3 Å |
構造データ | EMDB-16781: NTD focused cryo-EM map of p97/VCP in ADP.Pi state EMDB-17016, PDB-8ooi: EMDB-17024: D1-D2 ring focused cryo-EM map of p97/VCP in ADP.Pi state EMDB-17128: Consensus cryo-EM map of p97/VCP in ADP.Pi state |
化合物 | ChemComp-ADP: ChemComp-ATP: ChemComp-MG: ChemComp-K: ChemComp-PO4: ChemComp-HOH: |
由来 |
|
キーワード | HYDROLASE / AAA+ ATPase / complex |