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The Conformation of Calsequestrin Determines Its Ability to Regulate Skeletal Ryanodine Receptors

Wei, Lan; Varsányi, Magdolna; Dulhunty, Angela F.; Beard, Nicole A.


Ca2+ efflux from the sarcoplasmic reticulum decreases when store Ca2+ concentration falls, particularly in skinned fibers and isolated vesicles where luminal Ca2+ can be reduced to very low levels. However ryanodine receptor activity in many single channel studies is higher when the luminal free Ca2+ concentration is reduced. We investigated the hypothesis that prolonged exposure to low luminal Ca2+ causes conformational changes in calsequestrin and deregulation of ryanodine receptors, allowing...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Biophysical Journal
DOI: 10.1529/biophysj.106.082610


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