ClpXP / full-engaged state / AAA protease / CHAPERONE
機能・相同性
機能・相同性情報
HslUV protease complex / endopeptidase Clp / endopeptidase Clp complex / positive regulation of programmed cell death / response to temperature stimulus / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / protein unfolding / proteasomal protein catabolic process / : ...HslUV protease complex / endopeptidase Clp / endopeptidase Clp complex / positive regulation of programmed cell death / response to temperature stimulus / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / protein unfolding / proteasomal protein catabolic process / : / serine-type peptidase activity / ATP-dependent protein folding chaperone / response to radiation / disordered domain specific binding / : / response to heat / ATPase binding / protease binding / protein dimerization activity / serine-type endopeptidase activity / cell division / ATP hydrolysis activity / zinc ion binding / ATP binding / membrane / identical protein binding / cytosol 類似検索 - 分子機能
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)
R01-GM144542
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35-GM141517
米国
National Science Foundation (NSF, United States)
2046778
米国
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: A proteolytic AAA+ machine poised to unfold protein substrates. 著者: Alireza Ghanbarpour / Robert T Sauer / Joseph H Davis / 要旨: AAA+ proteolytic machines unfold proteins before degrading them. Here, we present cryoEM structures of ClpXP-substrate complexes that reveal a postulated but heretofore unseen intermediate in ...AAA+ proteolytic machines unfold proteins before degrading them. Here, we present cryoEM structures of ClpXP-substrate complexes that reveal a postulated but heretofore unseen intermediate in substrate unfolding/degradation. A ClpX hexamer draws natively folded substrates tightly against its axial channel via interactions with a fused C-terminal degron tail and ClpX-RKH loops that flexibly conform to the globular substrate. The specific ClpX-substrate contacts observed vary depending on the substrate degron and affinity tags, helping to explain ClpXP's ability to unfold/degrade a wide array of different cellular substrates. Some ClpX contacts with native substrates are enabled by upward movement of the seam subunit in the AAA+ spiral, a motion coupled to a rearrangement of contacts between the ClpX unfoldase and ClpP peptidase. Our structures additionally highlight ClpX's ability to translocate a diverse array of substrate topologies, including the co-translocation of two polypeptide chains.
名称: Branched-Degron DHFR / タイプ: protein_or_peptide / ID: 1 詳細: Since the side chain density is not well-resolved for the portion of the substrate within the ClpX axial channel, they we modeled it as poly-UNK. Therefore, the alignment with the actual ...詳細: Since the side chain density is not well-resolved for the portion of the substrate within the ClpX axial channel, they we modeled it as poly-UNK. Therefore, the alignment with the actual sequence of the substrate is not relevant. コピー数: 1 / 光学異性体: LEVO