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Journal ArticleDOI

HSP90 at the hub of protein homeostasis: emerging mechanistic insights

TLDR
Comprehensive understanding of how HSP90 functions promises not only to provide new avenues for therapeutic intervention, but to shed light on fundamental biological questions.
Abstract
Heat shock protein 90 (HSP90) is a highly conserved molecular chaperone that facilitates the maturation of a wide range of proteins (known as clients). Clients are enriched in signal transducers, including kinases and transcription factors. Therefore, HSP90 regulates diverse cellular functions and exerts marked effects on normal biology, disease and evolutionary processes. Recent structural and functional analyses have provided new insights on the transcriptional and biochemical regulation of HSP90 and the structural dynamics it uses to act on a diverse client repertoire. Comprehensive understanding of how HSP90 functions promises not only to provide new avenues for therapeutic intervention, but to shed light on fundamental biological questions.

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Citations
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Journal ArticleDOI

Heat Shock Protein 90 regulates encystation in Entamoeba.

TL;DR: It is shown that Hsp90 plays an important role in virulence and transmission of Entamoeba, and is identified to be a negative regulator of encystation in EntamoEBa.
Journal ArticleDOI

A methylated lysine is a switch point for conformational communication in the chaperone Hsp90

TL;DR: It is demonstrated that this particular lysine serves as a switch point for the regulation of Hsp90 functions by influencing its conformational cycle, ATPase activity, co-chaperone regulation, and client activation of yeast and human HSp90.
Journal ArticleDOI

Scrib regulates HGF-mediated epithelial morphogenesis and is stabilized by Sgt1-HSP90.

TL;DR: The identification of Scrib as an Sgt1–HSP90 client protein required for three-dimensional cell migration suggests that chaperone-mediated regulation of polarity protein stability and homeostasis is an unappreciated mechanism underlying dynamic rearrangements during morphogenesis.
Journal ArticleDOI

Estimation of Protein–Ligand Unbinding Kinetics Using Non-Equilibrium Targeted Molecular Dynamics Simulations

TL;DR: In this paper, nonequilibrium targeted molecular dynamics simulations were used for the estimation of protein-ligand unbinding kinetics, and the results were correlated with experimental data from SPR k-means.
Journal ArticleDOI

Development of a novel Hsp90 inhibitor NCT-50 as a potential anticancer agent for the treatment of non-small cell lung cancer

TL;DR: NCT-50 as mentioned in this paper is a novobiocin-deguelin analog hybridizing the pharmacophores of these known Hsp90 inhibitors and showed significant inhibitory effects on the viability and colony formation of non-small cell lung cancer (NSCLC) cells and those carrying resistance to chemotherapy.
References
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Journal ArticleDOI

Mechanism of Activation of the Raf-Erk Signaling Pathway by Oncogenic Mutations of B-Raf

TL;DR: The high activity mutants signal to ERK by directly phosphorylating MEK, whereas the impaired activity mutants stimulate MEK by activating endogenous C-RAF, possibly via an allosteric or transphosphorylation mechanism.
Journal ArticleDOI

HSP90 and the chaperoning of cancer.

TL;DR: Pharmacologically 'bribing' the essential guard duty of the chaperone HSP90 (heat-shock protein of 90 kDa) seems to offer a unique anticancer strategy of considerable promise.
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Hsp90 as a capacitor for morphological evolution

TL;DR: It is reported that when Drosophila Hsp90 is mutant or pharmacologically impaired, phenotypic variation affecting nearly any adult structure is produced, with specific variants depending on the genetic background and occurring both in laboratory strains and in wild populations.
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Adapting proteostasis for disease intervention.

TL;DR: The proteostasis network is described, a set of interacting activities that maintain the health of proteome and the organism that has the potential to ameliorate some of the most challenging diseases of this era.
Journal ArticleDOI

Function and regulation of cullin-RING ubiquitin ligases.

TL;DR: This review focuses on the composition, regulation and function of cullin–RING ligases, and describes how these enzymes can be characterized by a set of general principles.
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