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@ARTICLE{Oroz:140876,
author = {Oroz, Javier and Blair, Laura J and Zweckstetter, Markus},
title = {{D}ynamic {A}ha1 co-chaperone binding to human {H}sp90.},
journal = {Protein science},
volume = {28},
number = {9},
issn = {0961-8368},
address = {Bethesda, Md.},
publisher = {Protein Society},
reportid = {DZNE-2020-07198},
pages = {1545-1551},
year = {2019},
abstract = {Hsp90 is an essential chaperone that requires large
allosteric changes to determine its ATPase activity and
client binding. The co-chaperone Aha1, which is the major
ATPase stimulator in eukaryotes, is important for regulation
of Hsp90's allosteric timing. Little is known, however,
about the structure of the Hsp90/Aha1 complex. Here, we
characterize the solution structure of unmodified human
Hsp90/Aha1 complex using NMR spectroscopy. We show that the
214-kDa complex forms by a two-step binding mechanism and
adopts multiple conformations in the absence of nucleotide.
Aha1 induces structural changes near Hsp90's
nucleotide-binding site, providing a basis for its
ATPase-enhancing activity. Our data reveal important aspects
of this pivotal chaperone/co-chaperone interaction and
emphasize the relevance of characterizing dynamic chaperone
structures in solution.},
keywords = {Allosteric Regulation / Binding Sites / HSP90 Heat-Shock
Proteins: chemistry / HSP90 Heat-Shock Proteins: metabolism
/ Humans / Models, Molecular / Molecular Chaperones:
chemistry / Molecular Chaperones: metabolism / Molecular
Weight / Nuclear Magnetic Resonance, Biomolecular / Protein
Binding / Protein Conformation},
cin = {AG Zweckstetter},
ddc = {610},
cid = {I:(DE-2719)1410001},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31299134},
pmc = {pmc:PMC6699087},
doi = {10.1002/pro.3678},
url = {https://pub.dzne.de/record/140876},
}