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Storage of phosphorylated desmin in a familial myopathy

Storage of phosphorylated desmin in a familial myopathy The quantity and the electrophoretic characteristics of desmin were analyzed in a familial skeletal muscle disorder, characterized by the intra‐sarcoplasmic accumulation of an electron‐dense granulo‐filamentous material facing the Z‐lines and reacting strongly with polyclonal anti‐desmin antibodies. The analysis was performed on biopsies from the deltoid muscles of 4 patients, members of 2 families. In the 4 biopsies, an increase in the relative amount of desmin compared to that of actin or insoluble proteins (3 fold) and in the number of isovariants (6 instead of 3) was observed. The isovariants of desmin were similar to those described in Purkinje fibres of the heart as a phosphorylated form of the protein [(1987) Eur. J. Cell Biol. 44, 68–781]. Therefore, post‐translational events could affect both the polymerization and the amount of desmin filaments in this autosomal dominant familial myopathy. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Febs Letters Wiley

Storage of phosphorylated desmin in a familial myopathy

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References (16)

Publisher
Wiley
Copyright
© 2015 Federation of European Biochemical Societies
eISSN
1873-3468
DOI
10.1016/0014-5793(88)80863-9
Publisher site
See Article on Publisher Site

Abstract

The quantity and the electrophoretic characteristics of desmin were analyzed in a familial skeletal muscle disorder, characterized by the intra‐sarcoplasmic accumulation of an electron‐dense granulo‐filamentous material facing the Z‐lines and reacting strongly with polyclonal anti‐desmin antibodies. The analysis was performed on biopsies from the deltoid muscles of 4 patients, members of 2 families. In the 4 biopsies, an increase in the relative amount of desmin compared to that of actin or insoluble proteins (3 fold) and in the number of isovariants (6 instead of 3) was observed. The isovariants of desmin were similar to those described in Purkinje fibres of the heart as a phosphorylated form of the protein [(1987) Eur. J. Cell Biol. 44, 68–781]. Therefore, post‐translational events could affect both the polymerization and the amount of desmin filaments in this autosomal dominant familial myopathy.

Journal

Febs LettersWiley

Published: Apr 25, 1988

Keywords: ; ; ;

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