Allosteric opening of the polypeptide-binding site when an Hsp70 binds ATP.
Allosteric opening of the polypeptide-binding site when an Hsp70 binds ATP.
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DOI:
10.1038/nsmb.2583
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发表时间:
2013-07
影响因子:
16.8
通讯作者:
Liu, Qinglian
中科院分区:
文献类型:
--
作者:
Qi, Ruifeng;Sarbeng, Evans Boateng;Liu, Qun;Le, Katherine Quynh;Xu, Xinping;Xu, Hongya;Yang, Jiao;Wong, Jennifer Li;Vorvis, Christina;Hendrickson, Wayne A.;Zhou, Lei;Liu, Qinglian
The 70kD heat shock proteins (Hsp70s) are ubiquitous molecular chaperones essential for cellular protein folding and proteostasis. Each Hsp70 has two functional domains: a nucleotide-binding domain (NBD) that binds and hydrolyzes ATP, and a substrate-binding domain (SBD) that binds extended polypeptides. NBD and SBD interact little when in ADP; however, ATP binding allosterically couples the polypeptide- and ATP-binding sites. ATP binding promotes polypeptide release; polypeptide rebinding stimulates ATP hydrolysis. This allosteric coupling is poorly understood. Here we present the crystal structure of an intact Hsp70 from Escherichia coli in an ATP-bound state at 1.96 Å resolution. NBD-ATP adopts a unique conformation, forming extensive interfaces with a radically changed SBD that has its α-helical lid displaced and the polypeptide-binding channel of its β-subdomain restructured. These conformational changes together with our biochemical tests provide a long-sought structural explanation for allosteric coupling in Hsp70 activity.
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DOI:
10.1107/s090744491003982x
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Evans PR
通讯作者:
Evans PR
影响因子:
5.6
作者:
Bhattacharya, Akash;Kurochkin, Alexander V.;Yip, Grover N. B.;Zhang, Yongbo;Bertelsen, Eric B.;Zuiderweg, Erik R. P.
通讯作者:
Zuiderweg, Erik R. P.
影响因子:
16
作者:
Kityk, Roman;Kopp, Juergen;Mayer, Matthias P.
通讯作者:
Mayer, Matthias P.
DOI:
10.1002/prot.340110305
发表时间:
1991-01-01
期刊:
PROTEINS-STRUCTURE FUNCTION AND GENETICS
影响因子:
--
作者:
ICHIYE, T;KARPLUS, M
通讯作者:
KARPLUS, M
影响因子:
56.9
作者:
FLYNN, GC;CHAPPELL, TG;ROTHMAN, JE
通讯作者:
ROTHMAN, JE