Orthograde dihydropyridine receptor signal regulates ryanodine receptor passive leak
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چکیده
منابع مشابه
Dihydropyridine and Ryanodine Receptor Binding After
The purpose of this study was to determine if there are alterations in the dihydropyridine and/or ryanodine receptors that might explain the excitation-contraction uncoupling associated with eccentric contraction-induced skeletal muscle injury. The left anterior crural muscles (i.e., tibialis anterior, extensor digitorum longus, and extensor hallucis longus) of mice were injured in vivo by 150 ...
متن کاملCross-linking analysis of the ryanodine receptor and alpha1-dihydropyridine receptor in rabbit skeletal muscle triads.
In mature skeletal muscle, excitation-contraction (EC) coupling is thought to be mediated by direct physical interactions between the transverse tubular, voltage-sensing dihydropyridine receptor (DHPR) and the ryanodine receptor (RyR) Ca2+ release channel of the sarcoplasmic reticulum (SR). Although previous attempts at demonstrating interactions between purified RyR and alpha1-DHPR have failed...
متن کاملActivating the ryanodine receptor with dihydropyridine receptor II-III loop segments: size and charge do matter.
Excitation-contraction coupling in skeletal muscle is thought to depend on a physical interaction between II-III loop of the alpha1 subunit of the skeletal dihydropyridine receptor (DHPR) and ryanodine receptor (RyR). A peptide corresponding to II-III loop residues 671-690 of the skeletal DHPR (peptide A) is a high affinity activator of the RyR when it adopts an alpha-helical structure with cri...
متن کاملAltered Stoichiometry of FKBP12.6 Versus Ryanodine Receptor as a Cause of Abnormal Ca Leak Through Ryanodine Receptor in Heart Failure
Background—In the pathogenesis of cardiac dysfunction in heart failure, a decrease in the activity of the sarcoplasmic reticulum (SR) Ca-ATPase is believed to be a major determinant. Here, we report a novel mechanism of cardiac dysfunction revealed by assessing the functional interaction of FK506–binding protein (FKBP12.6) with the cardiac ryanodine receptor (RyR) in a canine model of pacing-in...
متن کاملRyanodine Receptor
1.1 Size and Evolution The ryanodine receptor (RyR) is a selective Ca release channel that is localized to the endoplasmic reticulum (ER) in both excitable and non-excitable cells. The RyR owes its name to the plant alkaloid and high affinity ligand ryanodine. The functional RyR exists as a tetramer composed of a single unit of approximately 565kDa. To date, it is the largest known ion channel....
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2011
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1018380108