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Molecular mechanism of PINK1 regulation by the Hsp90 machinery
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Journal Article
Molecular mechanism of PINK1 regulation by the Hsp90 machinery
2025
Overview
Hundreds of human kinases, including PINK1—a protein kinase associated with familial Parkinson’s disease—are regulated by Hsp90 and its cochaperones. While previous studies have elucidated the mechanism of kinase loading into the Hsp90 machinery, the subsequent regulation of kinases by Hsp90 and its cochaperones remains poorly understood. In this study, using complexes obtained through PINK1 pulldown, we determine the cryo-EM structures of the human Hsp90-Cdc37-PINK1 complex at 2.84 Å, Hsp90-FKBP51-PINK1 at approximately 6 Å, and Hsp90- PINK1 at 2.98 Å. These structures, along with the bound nucleotide in the Hsp90 dimers of the three complexes, provide insights into the Hsp90 chaperone machinery for kinases and elucidate the molecular mechanisms governing cytosolic PINK1 regulation.
The protein kinase PINK1 is implicated in Parkinson’s disease and regulated by the heat shock protein Hsp90. Here, the authors obtain three cryo-EM structures of PINK1– Hsp90 complexes with different cochaperones and propose a regulatory mechanism.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ Cell Cycle Proteins - chemistry
/ Cell Cycle Proteins - metabolism
/ Cell Cycle Proteins - ultrastructure
/ Disease
/ HSP90 Heat-Shock Proteins - chemistry
/ HSP90 Heat-Shock Proteins - genetics
/ HSP90 Heat-Shock Proteins - metabolism
/ HSP90 Heat-Shock Proteins - ultrastructure
/ Humanities and Social Sciences
/ Humans
/ Kinases
/ Mutation
/ Protein Kinases - metabolism
/ Protein Kinases - ultrastructure
/ Proteins
/ PTEN-induced putative kinase
/ Regulatory mechanisms (biology)
/ Science
