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Cited by 164

The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.

Regulation of the Dynamics of hsp90 Action on the Glucocorticoid Receptor by Acetylation/Deacetylation of the Chaperone

Open access
Murphy, Patrick J.M., Morishima, Yoshihiro, Kovacs, Jeffrey J., Yao, Tso-Pang, Pratt, William B.·2005·Journal of Biological Chemistry

Abstract

It is known that inhibition of histone deacetylases (HDACs) leads to acetylation of the abundant protein chaperone hsp90. In a recent study, we have shown that knockdown of HDAC6 by a specific small interfering RNA leads to hyperacetylation of hsp90 and that the glucocorticoid receptor (GR), an established hsp90 "client" protein, is defective in ligand binding, nuclear translocation, and gene activation in HDAC6-deficient cells (Kovacs, J. J., Murphy, P. J. M., Gaillard, S., Zhao, X., Wu, J-T., Nicchitta, C. V., Yoshida, M., Toft, D. O., Pratt, W. B., and Yao, T-P. (2005) Mol. Cell 18, 601-607). Using human embryonic kidney wild-type and HDAC6 (small interfering RNA) knockdown cells transiently expressing the mouse GR, we show here that the intrinsic properties of the receptor protein itself are not affected by HDAC6 knockdown, but the knockdown cytosol has a markedly decreased ability to assemble stable GR.hsp90 heterocomplexes and generate stable steroid binding activity under cell-free conditions. HDAC6 knockdown cytosol has the same ability to carry out dynamic GR.hsp90 heterocomplex assembly as wild-type cytosol. Addition of purified hsp90 to HDAC6 knockdown cytosol restores stable GR.hsp90 heterocomplex assembly to the level of wild-type cytosol. hsp90 from HDAC6 knockdown cytosol has decreased ATP-binding affinity, and it does not assemble stable GR.hsp90 heterocomplexes when it is a component of a purified five-protein assembly system. Incubation of knockdown cell hsp90 with purified HDAC6 converts the hsp90 to wild-type behavior. Thus, acetylation of hsp90 results in dynamic GR.hsp90 heterocomplex assembly/disassembly, and this is manifest in the cell as a approximately 100-fold shift to the right in the steroid dose response for gene activation.

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Metadata

Authors
Murphy, P. J. M., Morishima, Y., Kovacs, J. J., Yao, T.-P., & Pratt, W. B.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-10
Volume
280
Issue
40
Pages
33792-33799
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2091973193
Cited by
164
References
10
FWCI
5.30
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Regulation of the Dynamics of hsp90 Action on the Glucocorticoid Receptor by Acetylation/Deacetylation of the Chaperone. https://app.cochat.ai/papers/10.1074/jbc.m506997200
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Murphy, P. J. M., Morishima, Y., Kovacs, J. J., Yao, T.-P., & Pratt, W. B. (2005). Regulation of the Dynamics of hsp90 Action on the Glucocorticoid Receptor by Acetylation/Deacetylation of the Chaperone. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m506997200

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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