- EMDB-33937: Structure of recombinant RyR2 (EGTA dataset, class 2, closed state) -
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基本情報
登録情報
データベース: EMDB / ID: EMD-33937
タイトル
Structure of recombinant RyR2 (EGTA dataset, class 2, closed state)
マップデータ
Structure of recombinant RyR2 (EGTA dataset, class 2, closed state)
試料
複合体: Recombinant RyR2 in the presence of EGTA
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 / regulation of atrial cardiac muscle cell action potential / left ventricular cardiac muscle tissue morphogenesis / suramin binding / regulation of AV node cell action potential / regulation of SA 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 / regulation of atrial cardiac muscle cell action potential / left ventricular cardiac muscle tissue morphogenesis / suramin binding / regulation of AV node cell action potential / regulation of SA node cell action potential / : / Stimuli-sensing channels / regulation of ventricular cardiac muscle cell action potential / ventricular cardiac muscle cell action potential / Ion homeostasis / 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 / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / response to redox state / calcium ion transmembrane import into cytosol / 'de novo' protein folding / negative regulation of heart rate / response to muscle activity / FK506 binding / positive regulation of axon regeneration / protein kinase A regulatory subunit binding / protein kinase A catalytic subunit binding / cellular response to caffeine / positive regulation of the force of heart contraction / intracellularly gated calcium channel activity / smooth muscle contraction / response to vitamin E / detection of calcium ion / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / smooth endoplasmic reticulum / calcium channel inhibitor activity / positive regulation of heart rate / T cell proliferation / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / response to muscle stretch / sarcoplasmic reticulum membrane / release of sequestered calcium ion into cytosol / cellular response to epinephrine stimulus / calcium channel regulator activity / calcium channel complex / protein maturation / regulation of heart rate / peptidyl-prolyl cis-trans isomerase activity / sarcoplasmic reticulum / sarcomere / RNA polymerase II CTD heptapeptide repeat P3 isomerase activity / RNA polymerase II CTD heptapeptide repeat P6 isomerase activity / establishment of localization in cell / peptidylprolyl isomerase / calcium-mediated signaling / calcium ion transmembrane transport / response to hydrogen peroxide / calcium channel activity / Stimuli-sensing channels / 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.