Hsp90-Tau complex reveals molecular basis for specificity in chaperone action.

Hsp90-Tau complex reveals molecular basis for specificity in chaperone action.
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HSP90-TAU复合物揭示了伴侣作用特异性的分子基础。

DOI:
10.1016/j.cell.2014.01.037
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发表时间:
2014-02-27
期刊:
影响因子:
64.5
通讯作者:
Rüdiger SG
Rüdiger SG
中科院分区:
生物学1区
文献类型:
--
作者:
Karagöz GE;Duarte AM;Akoury E;Ippel H;Biernat J;Morán Luengo T;Radli M;Didenko T;Nordhues BA;Veprintsev DB;Dickey CA;Mandelkow E;Zweckstetter M;Boelens R;Madl T;Rüdiger SG

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Protein folding in the cell relies on the orchestrated action of conserved families of molecular chaperones, the Hsp70 and Hsp90 systems. Hsp70 acts early and Hsp90 late in the folding path, yet the molecular basis of this timing is enigmatic, mainly because the substrate specificity of Hsp90 is poorly understood. Here we obtained a structural model of Hsp90 in complex with its natural disease-associated substrate, the intrinsically disordered Tau protein. Hsp90 binds to a broad region in Tau that includes the aggregation-prone repeats. Complementarily, a 106 Å long substrate-binding interface in Hsp90 enables many low affinity contacts. It allows recognition of scattered hydrophobic residues in late folding intermediates that remain after early burial of the Hsp70 sites. Our model resolves the paradox of how Hsp90 specifically selects for late folding intermediates but also for some intrinsically disordered proteins – through the eyes of Hsp90 they look the same.
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