- EMDB-33939: Structure of recombinant RyR2 (Ca2+ dataset, class 2, open state) -
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基本情報
登録情報
データベース: EMDB / ID: EMD-33939
タイトル
Structure of recombinant RyR2 (Ca2+ dataset, class 2, open state)
マップデータ
Structure of recombinant RyR2 (Ca2 dataset, class 2, open state)
試料
複合体: Recombinant RyR2 in the presence of Ca2+
複合体: Ryanodine receptor 2
複合体: FKBP1B
機能・相同性
機能・相同性情報
: / establishment of protein localization to endoplasmic reticulum / type B pancreatic cell apoptotic process / Purkinje myocyte to ventricular cardiac muscle cell signaling / suramin binding / regulation of SA node cell action potential / regulation of atrial cardiac muscle cell action potential / left ventricular cardiac muscle tissue morphogenesis / regulation of AV node cell action potential / Stimuli-sensing channels ...: / establishment of protein localization to endoplasmic reticulum / type B pancreatic cell apoptotic process / Purkinje myocyte to ventricular cardiac muscle cell signaling / suramin binding / regulation of SA node cell action potential / regulation of atrial cardiac muscle cell action potential / left ventricular cardiac muscle tissue morphogenesis / regulation of AV node cell action potential / Stimuli-sensing channels / Ion homeostasis / regulation of ventricular cardiac muscle cell action potential / ventricular cardiac muscle cell action potential / positive regulation of sequestering of calcium ion / cyclic nucleotide binding / negative regulation of calcium-mediated signaling / embryonic heart tube morphogenesis / cardiac muscle hypertrophy / negative regulation of insulin secretion involved in cellular response to glucose stimulus / negative regulation of release of sequestered calcium ion into cytosol / neuronal action potential propagation / insulin secretion involved in cellular response to glucose stimulus / calcium ion transport into cytosol / ryanodine-sensitive calcium-release channel activity / response to caffeine / response to redox state / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / : / 'de novo' protein folding / calcium ion transmembrane import into cytosol / negative regulation of heart rate / response to muscle activity / FK506 binding / positive regulation of axon regeneration / channel regulator activity / protein kinase A regulatory subunit binding / protein kinase A catalytic subunit binding / positive regulation of the force of heart contraction / cellular response to caffeine / intracellularly gated calcium channel activity / smooth muscle contraction / detection of calcium ion / response to vitamin E / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / calcium channel inhibitor activity / smooth endoplasmic reticulum / regulation of ryanodine-sensitive calcium-release channel activity / positive regulation of heart rate / T cell proliferation / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Ion homeostasis / release of sequestered calcium ion into cytosol / calcium channel complex / cellular response to epinephrine stimulus / response to muscle stretch / sarcoplasmic reticulum membrane / regulation of heart rate / sarcomere / sarcoplasmic reticulum / establishment of localization in cell / peptidyl-prolyl cis-trans isomerase activity / peptidylprolyl isomerase / calcium-mediated signaling / calcium channel activity / response to hydrogen peroxide / Stimuli-sensing channels / calcium ion transmembrane transport / Z disc / intracellular calcium ion homeostasis / calcium ion transport / positive regulation of cytosolic calcium ion concentration / protein refolding / transmembrane transporter binding / response to hypoxia / calmodulin binding / signaling receptor binding / calcium ion binding / protein kinase binding / enzyme binding / protein-containing complex / identical protein binding / membrane / cytoplasm 類似検索 - 分子機能
Japan Agency for Medical Research and Development (AMED)
JP21am0101080
日本
Japan Agency for Medical Research and Development (AMED)
19ek0109202
日本
引用
ジャーナル: Nat Commun / 年: 2022 タイトル: Molecular basis for gating of cardiac ryanodine receptor explains the mechanisms for gain- and loss-of function mutations. 著者: Takuya Kobayashi / Akihisa Tsutsumi / Nagomi Kurebayashi / Kei Saito / Masami Kodama / Takashi Sakurai / Masahide Kikkawa / Takashi Murayama / Haruo Ogawa / 要旨: Cardiac ryanodine receptor (RyR2) is a large Ca release channel in the sarcoplasmic reticulum and indispensable for excitation-contraction coupling in the heart. RyR2 is activated by Ca and RyR2 ...Cardiac ryanodine receptor (RyR2) is a large Ca release channel in the sarcoplasmic reticulum and indispensable for excitation-contraction coupling in the heart. RyR2 is activated by Ca and RyR2 mutations are implicated in severe arrhythmogenic diseases. Yet, the structural basis underlying channel opening and how mutations affect the channel remains unknown. Here, we address the gating mechanism of RyR2 by combining high-resolution structures determined by cryo-electron microscopy with quantitative functional analysis of channels carrying various mutations in specific residues. We demonstrated two fundamental mechanisms for channel gating: interactions close to the channel pore stabilize the channel to prevent hyperactivity and a series of interactions in the surrounding regions is necessary for channel opening upon Ca binding. Mutations at the residues involved in the former and the latter mechanisms cause gain-of-function and loss-of-function, respectively. Our results reveal gating mechanisms of the RyR2 channel and alterations by pathogenic mutations at the atomic level.