Mu A, Thomas E Wales, Haixia Zhou, Sorin-Valeriu Draga-Coletă, Christoph Gorgulla, Katherine A Blackmore, Melanie J Mittenbühler, Caroline R Kim, Dina Bogoslavski, Qiuyang Zhang, Zi-Fu Wang, Mark P Jedrychowski, Hyuk-Soo Seo, Kijun Song, Andrew Z Xu, Luke Sebastian, Steven P Gygi, Haribabu Arthanari, Sirano Dhe-Paganon, Patrick R Griffin, John R Engen, Bruce M Spiegelman
{"title":"Irisin acts through its integrin receptor in a two-step process involving extracellular Hsp90α.","authors":"Mu A, Thomas E Wales, Haixia Zhou, Sorin-Valeriu Draga-Coletă, Christoph Gorgulla, Katherine A Blackmore, Melanie J Mittenbühler, Caroline R Kim, Dina Bogoslavski, Qiuyang Zhang, Zi-Fu Wang, Mark P Jedrychowski, Hyuk-Soo Seo, Kijun Song, Andrew Z Xu, Luke Sebastian, Steven P Gygi, Haribabu Arthanari, Sirano Dhe-Paganon, Patrick R Griffin, John R Engen, Bruce M Spiegelman","doi":"10.1016/j.molcel.2023.05.008","DOIUrl":null,"url":null,"abstract":"<p><p>Exercise benefits the human body in many ways. Irisin is secreted by muscle, increased with exercise, and conveys physiological benefits, including improved cognition and resistance to neurodegeneration. Irisin acts via αV integrins; however, a mechanistic understanding of how small polypeptides like irisin can signal through integrins is poorly understood. Using mass spectrometry and cryo-EM, we demonstrate that the extracellular heat shock protein 90α (eHsp90α) is secreted by muscle with exercise and activates integrin αVβ5. This allows for high-affinity irisin binding and signaling through an Hsp90α/αV/β5 complex. By including hydrogen/deuterium exchange data, we generate and experimentally validate a 2.98 Å RMSD irisin/αVβ5 complex docking model. Irisin binds very tightly to an alternative interface on αVβ5 distinct from that used by known ligands. These data elucidate a non-canonical mechanism by which a small polypeptide hormone like irisin can function through an integrin receptor.</p>","PeriodicalId":18950,"journal":{"name":"Molecular Cell","volume":null,"pages":null},"PeriodicalIF":14.5000,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10984146/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Cell","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1016/j.molcel.2023.05.008","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Exercise benefits the human body in many ways. Irisin is secreted by muscle, increased with exercise, and conveys physiological benefits, including improved cognition and resistance to neurodegeneration. Irisin acts via αV integrins; however, a mechanistic understanding of how small polypeptides like irisin can signal through integrins is poorly understood. Using mass spectrometry and cryo-EM, we demonstrate that the extracellular heat shock protein 90α (eHsp90α) is secreted by muscle with exercise and activates integrin αVβ5. This allows for high-affinity irisin binding and signaling through an Hsp90α/αV/β5 complex. By including hydrogen/deuterium exchange data, we generate and experimentally validate a 2.98 Å RMSD irisin/αVβ5 complex docking model. Irisin binds very tightly to an alternative interface on αVβ5 distinct from that used by known ligands. These data elucidate a non-canonical mechanism by which a small polypeptide hormone like irisin can function through an integrin receptor.
期刊介绍:
Molecular Cell is a companion to Cell, the leading journal of biology and the highest-impact journal in the world. Launched in December 1997 and published monthly. Molecular Cell is dedicated to publishing cutting-edge research in molecular biology, focusing on fundamental cellular processes. The journal encompasses a wide range of topics, including DNA replication, recombination, and repair; Chromatin biology and genome organization; Transcription; RNA processing and decay; Non-coding RNA function; Translation; Protein folding, modification, and quality control; Signal transduction pathways; Cell cycle and checkpoints; Cell death; Autophagy; Metabolism.