Article
Cardiac calcium signalling pathologies associated with defective calmodulin regulation of type 2 ryanodine receptor.
The Journal of physiology - 1 Sept 2013
Arnáiz-Cot Juan José, Damon Brooke James, Zhang Xiao-Hua, Cleemann Lars, Yamaguchi Naohiro, Meissner Gerhard, Morad Martin
Abstract excerpt
Cardiac ryanodine receptor (RyR2) is a homotetramer of 560 kDa polypeptides regulated by calmodulin (CaM), which decreases its open probability at diastolic and systolic Ca(2+) concentrations. Point mutations in the CaM-binding domain of RyR2 (W3587A/L3591D/F3603A, RyR2(ADA)) in mice result in severe cardiac hypertrophy, poor left ventricle contraction and death by postnatal day 16, suggesting that CaM inhibition...
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