Skeletal muscle phosphoproteins: Muscle-specific basal and cAMP-dependent phosphoprotein profiles

Garth A. Nicholson*, James G. McLeod, Leone Luey

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


To determine whether or not phosphorylation of skeletal muscle proteins is related to functional specialization of individual muscles, we examined the distribution of phosphoproteins in skeletal muscles with different functional properties. Protein phosphorylation was carried out using [γ-32P]ATP and employing endogenous protein kinases present in skeletal muscle homogenates. Phosphoprotein bands were separated by polyacrylamide gel electrophoresis. We found distinct cAMP-stimulated and basal phosphoprotein patterns in each contraction type; indicating that the phosphoprotein profile is related to functional characteristics. Muscle-specific, cAMP-dependent phosphoproteins may permit coordinate short-term alterations in twitch characteristics of skeletal muscle fibers in response to circulating hormones or other mediators.

Original languageEnglish
Pages (from-to)138-144
Number of pages7
JournalExperimental Neurology
Issue number1
Publication statusPublished - 1986
Externally publishedYes


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