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Cited by 584

The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.

During muscle atrophy, thick, but not thin, filament components are degraded by MuRF1-dependent ubiquitylation

Open access
Cohen, Shenhav, Brault, Jeffrey J., Gygi, Steven P., Glass, David J., Valenzuela, David M., Gartner, Carlos, Latres, Esther, Goldberg, Alfred L.·2009·Journal of Cell Biology

Abstract

Loss of myofibrillar proteins is a hallmark of atrophying muscle. Expression of muscle RING-finger 1 (MuRF1), a ubiquitin ligase, is markedly induced during atrophy, and MuRF1 deletion attenuates muscle wasting. We generated mice expressing a Ring-deletion mutant MuRF1, which binds but cannot ubiquitylate substrates. Mass spectrometry of the bound proteins in denervated muscle identified many myofibrillar components. Upon denervation or fasting, atrophying muscles show a loss of myosin-binding protein C (MyBP-C) and myosin light chains 1 and 2 (MyLC1 and MyLC2) from the myofibril, before any measurable decrease in myosin heavy chain (MyHC). Their selective loss requires MuRF1. MyHC is protected from ubiquitylation in myofibrils by associated proteins, but eventually undergoes MuRF1-dependent degradation. In contrast, MuRF1 ubiquitylates MyBP-C, MyLC1, and MyLC2, even in myofibrils. Because these proteins stabilize the thick filament, their selective ubiquitylation may facilitate thick filament disassembly. However, the thin filament components decreased by a mechanism not requiring MuRF1.

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Metadata

Authors
Cohen, S., Brault, J. J., Gygi, S. P., Glass, D. J., Valenzuela, D. M., Gartner, C., Latres, E., & Goldberg, A. L.
Venue
Journal of Cell Biology
Published
2009-06-08
Volume
185
Issue
6
Pages
1083-1095
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2144203293
Cited by
584
References
7
FWCI
15.36
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: During muscle atrophy, thick, but not thin, filament components are degraded by MuRF1-dependent ubiquitylation. https://app.cochat.ai/papers/10.1083/jcb.200901052
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Cohen, S., Brault, J. J., Gygi, S. P., Glass, D. J., Valenzuela, D. M., Gartner, C., Latres, E., & Goldberg, A. L. (2009). During muscle atrophy, thick, but not thin, filament components are degraded by MuRF1-dependent ubiquitylation. Journal of Cell Biology. https://doi.org/10.1083/jcb.200901052

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