Active conformation of the p97-p47 unfoldase complex.
Active conformation of the p97-p47 unfoldase complex.
复制标题
DOI:
10.1038/s41467-022-30318-3
复制
发表时间:
2022-05-12
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
The p97 AAA+ATPase is an essential and abundant regulator of protein homeostasis that plays a central role in unfolding ubiquitylated substrates. Here we report two cryo-EM structures of human p97 in complex with its p47 adaptor. One of the conformations is six-fold symmetric, corresponds to previously reported structures of p97, and lacks bound substrate. The other structure adopts a helical conformation, displays substrate running in an extended conformation through the pore of the p97 hexamer, and resembles structures reported for other AAA unfoldases. These findings support the model that p97 utilizes a “hand-over-hand” mechanism in which two residues of the substrate are translocated for hydrolysis of two ATPs, one in each of the two p97 AAA ATPase rings. Proteomics analysis supports the model that one p97 complex can bind multiple substrate adaptors or binding partners, and can process substrates with multiple types of ubiquitin modification. The p97 unfoldase is an essential and abundant enzyme that segregates its substrates from macromolecular complexes and organelle membranes. Here, authors determined the structure of human p97 in the act of unfolding an authentic substrate.
登录
查看更多内容
影响因子:
48
作者:
Barad BA;Echols N;Wang RY;Cheng Y;DiMaio F;Adams PD;Fraser JS
通讯作者:
Fraser JS
DOI:
10.1038/nsb972
发表时间:
2003-10-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
DeLaBarre, B;Brunger, AT
通讯作者:
Brunger, AT
影响因子:
4.8
作者:
Han, Han;Schubert, Heidi L.;Hill, Christopher P.
通讯作者:
Hill, Christopher P.
DOI:
10.1107/s2059798318006551
发表时间:
2018-06-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Poon BK;Read RJ;Sobolev OV;Terwilliger TC;Urzhumtsev A;Adams PD
通讯作者:
Adams PD
影响因子:
3
作者:
Mastronarde, DN
通讯作者:
Mastronarde, DN