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Echtenkamp FJ, et al.  (2011) Global Functional Map of the p23 Molecular Chaperone Reveals an Extensive Cellular Network. Mol Cell 43(2):229-41

Abstract: In parallel with evolutionary developments, the Hsp90 molecular chaperone system shifted from a simple prokaryotic factor into an expansive network that includes a variety of cochaperones. We have taken high-throughput genomic and proteomic approaches to better understand the abundant yeast p23 cochaperone Sba1. Our work revealed an unexpected p23 network that displayed considerable independence from known Hsp90 clients. Additionally, our data uncovered a broad nuclear role for p23, contrasting with the historical dogma of restricted cytosolic activities for molecular chaperones. Validation studies demonstrated that yeast p23 was required for proper Golgi function and ribosome biogenesis, and was necessary for efficient DNA repair from a wide range of mutagens. Notably, mammalian p23 had conserved roles in these pathways as well as being necessary for proper cell mobility. Taken together, our work demonstrates that the p23 chaperone serves a broad physiological network and functions both in conjunction with and sovereign to Hsp90.CI - Copyright (c) 2011 Elsevier Inc. All rights reserved.

Status: Published Type: Journal Article PubMed ID: 21777812

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GIM3 HSP82 LSB1 MEF1 MNN10 MNN11 SBA1 STI1
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