Using NMR to identify binding regions for N and C-terminal Hsp90 inhibitors using Hsp90 domains

文献情報

出版日 2021-02-15

DOI 10.1039/D0MD00387E

インパクトファクター 0

著者

Jeanette R. McConnell, H. Jane Dyson, Shelli R. McAlpine

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要旨

We present the first NMR study of the interaction between heat shock protein 90 (Hsp90) and amino (N)-terminal inhibitors 17-AAG, and AUY922, and carboxy (C)-terminal modulators SM253, and LB51. We show that the two ATP mimics, 17-AAG and AUY922, bind deeply within the ATP binding pocket of the N-terminal domain, consistent with the crystal structures. In contrast, SM253, a C-terminal Hsp90 modulator, binds to the linker region between the N and middle domains. We also show that C-terminal inhibitor LB51 binds to the C-terminus with a more significant spectroscopic change than previously reported using NMR binding studies of C-terminal inhibitors novobiocin and silybin. These data provide key insights into how the allosteric inhibitor SM253 controls the C-terminal co-chaperones and confirms the binding domain of LB51.

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RSC Medicinal Chemistry

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Using NMR to identify binding regions for N and C-terminal Hsp90 inhibitors using Hsp90 domains

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RSC Medicinal Chemistry

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