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Calsequestrin Is an Inhibitor of Skeletal Muscle Ryanodine Receptor Calcium Release Channels

Beard, Nicole; Sakowska, Magdalena; Dulhunty, Angela; Laver, Derek Rowland


We provide novel evidence that the sarcoplasmic reticulum calcium binding protein, calsequestrin, inhibits native ryanodine receptor calcium release channel activity. Calsequestrin dissociation from junctional face membrane was achieved by increasing luminal (trans) ionic strength from 250 to 500 mM with CsCl or by exposing the luminal side of ryanodine receptors to high [Ca2+] (13 mM) and dissociation was confirmed with sodium dodecyl sulfate-polyacrylamide gel electrophoresis and Western...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Biophysical Journal


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