- 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
manganese ion transmembrane transport / 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 / organic cyclic compound binding / regulation of AV node cell action potential ...manganese ion transmembrane transport / 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 / organic cyclic compound binding / regulation of AV node cell action potential / calcium-induced calcium release activity / sarcoplasmic reticulum calcium ion transport / 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 / calcium ion transport into cytosol / negative regulation of release of sequestered calcium ion into cytosol / neuronal action potential propagation / insulin secretion involved in cellular response to glucose stimulus / ryanodine-sensitive calcium-release channel activity / response to caffeine / response to muscle activity / A band / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / calcium ion transmembrane import into cytosol / response to redox state / protein maturation by protein folding / 'de novo' protein folding / negative regulation of heart rate / positive regulation of heart rate / FK506 binding / negative regulation of cytosolic calcium ion concentration / positive regulation of axon regeneration / protein kinase A regulatory subunit binding / extrinsic component of cytoplasmic side of plasma membrane / cellular response to caffeine / channel regulator activity / protein kinase A catalytic subunit binding / response to magnesium ion / positive regulation of the force of heart contraction / intracellularly gated calcium channel activity / detection of calcium ion / smooth muscle contraction / response to vitamin E / smooth endoplasmic reticulum / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / calcium channel inhibitor activity / striated muscle contraction / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / T cell proliferation / Ion homeostasis / release of sequestered calcium ion into cytosol / regulation of cytosolic calcium ion concentration / calcium channel complex / cellular response to epinephrine stimulus / sarcoplasmic reticulum membrane / response to muscle stretch / regulation of heart rate / sarcomere / sarcoplasmic reticulum / establishment of localization in cell / peptidylprolyl isomerase / peptidyl-prolyl cis-trans isomerase activity / calcium-mediated signaling / calcium ion transmembrane transport / response to hydrogen peroxide / calcium channel activity / Stimuli-sensing channels / sarcolemma / Z disc / response to calcium ion / intracellular calcium ion homeostasis / calcium ion transport / nuclear envelope / positive regulation of cytosolic calcium ion concentration / monoatomic ion transmembrane transport / protein refolding / scaffold protein binding / 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 / cytosol / 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.