- EMDB-42706: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of th... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-42706
タイトル
Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210
マップデータ
Constituent EM map: Focused refinement NTD SPRY Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210
試料
複合体: Complex of RyR2-R420Q and Calstabin-2 in the presence of ARM210
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
HL145473
米国
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: Structural basis for ryanodine receptor type 2 leak in heart failure and arrhythmogenic disorders. 著者: Marco C Miotto / Steven Reiken / Anetta Wronska / Qi Yuan / Haikel Dridi / Yang Liu / Gunnar Weninger / Carl Tchagou / Andrew R Marks / 要旨: Heart failure, the leading cause of mortality and morbidity in the developed world, is characterized by cardiac ryanodine receptor 2 channels that are hyperphosphorylated, oxidized, and depleted of ...Heart failure, the leading cause of mortality and morbidity in the developed world, is characterized by cardiac ryanodine receptor 2 channels that are hyperphosphorylated, oxidized, and depleted of the stabilizing subunit calstabin-2. This results in a diastolic sarcoplasmic reticulum Ca leak that impairs cardiac contractility and triggers arrhythmias. Genetic mutations in ryanodine receptor 2 can also cause Ca leak, leading to arrhythmias and sudden cardiac death. Here, we solved the cryogenic electron microscopy structures of ryanodine receptor 2 variants linked either to heart failure or inherited sudden cardiac death. All are in the primed state, part way between closed and open. Binding of Rycal drugs to ryanodine receptor 2 channels reverts the primed state back towards the closed state, decreasing Ca leak, improving cardiac function, and preventing arrhythmias. We propose a structural-physiological mechanism whereby the ryanodine receptor 2 channel primed state underlies the arrhythmias in heart failure and arrhythmogenic disorders.
ダウンロード / ファイル: emd_42706.map.gz / 形式: CCP4 / 大きさ: 512 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Constituent EM map: Focused refinement NTD SPRY Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210
ボクセルのサイズ
X
Y
Z
EMDB情報
0.83
0.83
0.83
CCP4マップ ヘッダ情報
1.88
1.88
1.88
密度
表面レベル
登録者による: 0.16
最小 - 最大
-0.2744009 - 0.6484602
平均 (標準偏差)
0.006291882 (±0.024365518)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
0
0
0
サイズ
512
512
512
Spacing
512
512
512
セル
A=B=C: 424.96 Å α=β=γ: 90.0 °
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添付データ
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試料の構成要素
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全体 : Complex of RyR2-R420Q and Calstabin-2 in the presence of ARM210
全体
名称: Complex of RyR2-R420Q and Calstabin-2 in the presence of ARM210
要素
複合体: Complex of RyR2-R420Q and Calstabin-2 in the presence of ARM210
複合体: Ryanodine Receptor 2
複合体: Peptidyl- cis-trans isomerase FKBP1B
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超分子 #1: Complex of RyR2-R420Q and Calstabin-2 in the presence of ARM210
超分子
名称: Complex of RyR2-R420Q and Calstabin-2 in the presence of ARM210 タイプ: complex / ID: 1 / 親要素: 0