Phosphoproteomics of three exercise modalities identifies canonical signaling and C18ORF25 as an AMPK substrate regulating skeletal muscle function

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Ronnie Blazev
  • Yaan-Kit Ng
  • Jeffrey Molendijk
  • Yuanyuan Zhao
  • Andrew J Kueh
  • Paula M Miotto
  • Vanessa R Haynes
  • Justin P Hardee
  • Jin D Chung
  • James W McNamara
  • Hongwei Qian
  • Paul Gregorevic
  • Jonathan S Oakhill
  • Marco J Herold
  • Leszek Lisowski
  • Gordon S Lynch
  • Garron T Dodd
  • Matthew J Watt
  • Pengyi Yang
  • Benjamin L Parker

Exercise induces signaling networks to improve muscle function and confer health benefits. To identify divergent and common signaling networks during and after different exercise modalities, we performed a phosphoproteomic analysis of human skeletal muscle from a cross-over intervention of endurance, sprint, and resistance exercise. This identified 5,486 phosphosites regulated during or after at least one type of exercise modality and only 420 core phosphosites common to all exercise. One of these core phosphosites was S67 on the uncharacterized protein C18ORF25, which we validated as an AMPK substrate. Mice lacking C18ORF25 have reduced skeletal muscle fiber size, exercise capacity, and muscle contractile function, and this was associated with reduced phosphorylation of contractile and Ca2+ handling proteins. Expression of C18ORF25 S66/67D phospho-mimetic reversed the decreased muscle force production. This work defines the divergent and canonical exercise phosphoproteome across different modalities and identifies C18ORF25 as a regulator of exercise signaling and muscle function.

OriginalsprogEngelsk
TidsskriftCell Metabolism
ISSN1550-4131
DOI
StatusE-pub ahead of print - 25 jul. 2022

Bibliografisk note

CURIS 2022 NEXS 176

Crown Copyright © 2022. Published by Elsevier Inc. All rights reserved.

ID: 315181021