Skip to Main content Skip to Navigation
Journal articles

O-linked N-acetylglucosaminylation is involved in the Ca2+-activation properties of rat skeletal muscle

Abstract : O-Linked N-acetylglucosaminylation termed O-GlcNAc is a dynamic cytosolic and nuclear glycosylation that is dependent both on glucose flow through the hexosamine biosynthesis pathway and on phosphorylation because of the existence of a balance between phosphorylation and O-GlcNAc. This glycosylation is a ubiquitous post-translational modification, which probably plays an important role in many aspects of protein functions. We have previously reported that, in skeletal muscle, proteins of the glycolytic pathway, energetic metabolism, and contractile proteins were O-GlcNAc-modified and that O-Glc-NAc variations could control the muscle protein homeostasis and be implicated in the regulation of muscular atrophy. In this paper, we report O-N-acetylglucosaminylation of a number of key contractile proteins (i.e. myosin heavy and light chains and actin), which suggests that this glycosylation could be involved in skeletal muscle contraction. Moreover, our results showed that incubation of skeletal muscle skinned fibers in N-acetyl-d-glucosamine, in a concentration solution known to inhibit O-GlcNAc-dependent interactions, induced a decrease in calcium sensitivity and affinity of muscular fibers, whereas the cooperativity of the thin filament proteins was not modified. Thus, our results suggest that O-GlcNAc is involved in contractile protein interactions and could thereby modulate muscle contraction.
Document type :
Journal articles
Complete list of metadata

Cited literature [59 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00250067
Contributor : Sandrine Duvet Connect in order to contact the contributor
Submitted on : Tuesday, August 18, 2020 - 2:11:27 PM
Last modification on : Tuesday, October 19, 2021 - 11:33:29 AM
Long-term archiving on: : Tuesday, December 1, 2020 - 6:30:32 PM

File

Hedou et alM606787.pdf
Files produced by the author(s)

Identifiers

Collections

`

Citation

Julie Hedou, Caroline Cieniewski-Bernard, Yves Leroy, Jean-Claude Michalski, Yvonne Mounier, et al.. O-linked N-acetylglucosaminylation is involved in the Ca2+-activation properties of rat skeletal muscle. Journal of Biological Chemistry, American Society for Biochemistry and Molecular Biology, 2007, 282 (14), pp.10360-9. ⟨10.1074/jbc.M606787200⟩. ⟨hal-00250067⟩

Share

Metrics

Record views

259

Files downloads

111