Cited by 247Cardiovascular and exercise physiologyExercise and Physiological ResponsesMuscle metabolism and nutrition

Ca2+–calmodulin‐dependent protein kinase expression and signalling in skeletal muscle during exercise

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Rose, Adam J., Kiens, Bente, Richter, Erik A.·2006·The Journal of Physiology

Abstract

Ca 2+ signalling is proposed to play an important role in skeletal muscle function during exercise. Here, we examined the expression of multifunctional Ca 2+–calmodulin‐dependent protein kinases (CaMK) in human skeletal muscle and show that CaMKII and CaMKK, but not CaMKI or CaMKIV, are expressed. Furthermore, the effect of exercise duration and intensity on skeletal muscle CaMKII activity and phosphorylation of downstream targets was examined. Eight healthy men exercised at ∼67% of peak pulmonary O 2 uptake with muscle samples taken at rest and after 1, 10, 30, 60 and 90 min of exercise. Ten other men exercised for three consecutive 10 min bouts at 35%, 60% and 85% with muscle samples taken at rest, at the end of each interval and 30 min post‐exercise. There was a rapid and transient increase in autonomous CaMKII activity and CaMKII phosphorylation at Thr 287 in skeletal muscle during exercise. Furthermore, the phosphorylation of phospholamban (PLN) at Thr 17, which was identified as a CaMKII substrate in skeletal muscle, was rapidly (< 1 min) increased by exercise, and remained phosphorylated 5‐fold above basal level during 90 min of exercise. The phosphorylation of serum response factor at Ser 103, a putative CaMKII substrate, was higher after 30 min of exercise. PLN phosphorylation at Thr 17 was higher with increasing exercise intensities. These data indicate that CaMKII is the major multifunctional CaMK in skeletal muscle and its activation occurs rapidly and is sustained during continuous exercise, with the activation being greater during intense exercise.

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Crossref · 10.1113/jphysiol.2006.111757

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  • Calcium released during contraction activates the calcium-calmodulin kinase family, specifically CaMKII in skeletal muscle.

    “For example, calcium released during contraction activates the calcium-calmodulin kinase (CaMK) family of proteins, specifically CaMKII in skeletal muscle [30].”

    From Using Molecular Biology to Maximize Concurrent Training (2014) · cites this paper as [30]

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Authors
Rose, A. J., Kiens, B., & Richter, E. A.
Affiliations
University of Copenhagen (DK)
Venue
The Journal of Physiology
Publisher
Wiley
Published
2006-07-21
Volume
574
Issue
3
Pages
889-903
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W2132520315
Cited by
247
References
59
Citations by year
2026: 9 · 2025: 10 · 2024: 10 · 2023: 12 · 2022: 17 · 2021: 14 · 2020: 11 · 2019: 10 · 2018: 11 · 2017: 9 · 2016: 12 · 2015: 11 · 2014: 15 · 2013: 9 · 2012: 13
FWCI
37.97
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
  • Sundhed og Sygdom, Det Frie Forskningsråd
  • Novo Nordisk
  • H. Lundbeck A/S
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
calcium/calmodulin-dependent protein kinase, CaMKII, CaMKK, skeletal muscle, physical activity, phospholamban phosphorylation, serum response factor, exercise intensity, exercise duration, protein kinase activity
MeSH terms
Adult, Enzyme Activation, Exercise Test, Physical Exertion, Humans, Male, Muscle Contraction, Physical Endurance, Signal Transduction, Gene Expression, Calcium-Calmodulin-Dependent Protein Kinases, Muscle, Skeletal

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