- EMDB-11072: Reconstruction of bovine Ryanodine receptor 2 dimer of tetramers ... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-11072
タイトル
Reconstruction of bovine Ryanodine receptor 2 dimer of tetramers in complex with FKBP12.6 and nanobodies
マップデータ
試料
複合体: Dimer of bovine Ryanodine receptor 2
キーワード
nanodisc / nanobody / FKBP12.6 / RyR2 / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
cyclic nucleotide binding / 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 / Ion homeostasis / left ventricular cardiac muscle tissue morphogenesis / suramin binding / regulation of AV node cell action potential ...cyclic nucleotide binding / 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 / Ion homeostasis / left ventricular cardiac muscle tissue morphogenesis / suramin binding / regulation of AV node cell action potential / regulation of SA node cell action potential / positive regulation of axon regeneration / regulation of ventricular cardiac muscle cell action potential / ventricular cardiac muscle cell action potential / positive regulation of sequestering of calcium ion / embryonic heart tube morphogenesis / cardiac muscle hypertrophy / negative regulation of insulin secretion involved in cellular response to glucose stimulus / neuronal action potential propagation / negative regulation of release of sequestered calcium ion into cytosol / calcium ion transport into cytosol / ryanodine-sensitive calcium-release channel activity / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / response to redox state / insulin secretion / protein peptidyl-prolyl isomerization / negative regulation of heart rate / response to vitamin E / negative regulation of ryanodine-sensitive calcium-release channel activity / FK506 binding / protein kinase A regulatory subunit binding / response to muscle activity / protein kinase A catalytic subunit binding / positive regulation of the force of heart contraction / cellular response to caffeine / regulation of ryanodine-sensitive calcium-release channel activity / smooth muscle contraction / detection of calcium ion / regulation of cytosolic calcium ion concentration / response to glucose / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / T cell proliferation / smooth endoplasmic reticulum / positive regulation of heart rate / calcium channel inhibitor activity / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / response to muscle stretch / release of sequestered calcium ion into cytosol / cellular response to epinephrine stimulus / calcium channel complex / sarcoplasmic reticulum membrane / regulation of heart rate / sarcoplasmic reticulum / peptidylprolyl isomerase / peptidyl-prolyl cis-trans isomerase activity / establishment of localization in cell / response to hydrogen peroxide / sarcolemma / Z disc / intracellular calcium ion homeostasis / positive regulation of cytosolic calcium ion concentration / transmembrane transporter binding / response to hypoxia / calmodulin binding / signaling receptor binding / intracellular membrane-bounded organelle / calcium ion binding / identical protein binding / membrane / cytoplasm 類似検索 - 分子機能
ジャーナル: J Biol Chem / 年: 2024 タイトル: Rapid small-scale nanobody-assisted purification of ryanodine receptors for cryo-EM. 著者: Chenyao Li / Katrien Willegems / Tomasz Uchański / Els Pardon / Jan Steyaert / Rouslan G Efremov / 要旨: Ryanodine receptors (RyRs) are large Ca release channels residing in the endoplasmic or sarcoplasmic reticulum membrane. Three isoforms of RyRs have been identified in mammals, the disfunction of ...Ryanodine receptors (RyRs) are large Ca release channels residing in the endoplasmic or sarcoplasmic reticulum membrane. Three isoforms of RyRs have been identified in mammals, the disfunction of which has been associated with a series of life-threatening diseases. The need for large amounts of native tissue or eukaryotic cell cultures limits advances in structural studies of RyRs. Here, we report a method that utilizes nanobodies to purify RyRs from only 5 mg of total protein. The purification process, from isolated membranes to cryo-EM grade protein, is achieved within 4 h on the bench, yielding protein usable for cryo-EM analysis. This is demonstrated by solving the structures of rabbit RyR1, solubilized in detergent, reconstituted into lipid nanodiscs or liposomes, and bovine RyR2 reconstituted in nanodisc, and mouse RyR2 in detergent. The reported method facilitates structural studies of RyRs directed toward drug development and is useful in cases where the amount of starting material is limited.
凍結剤: ETHANE / チャンバー内湿度: 95 % / チャンバー内温度: 293.15 K / 装置: GATAN CRYOPLUNGE 3 詳細: .Grid was blotted manually from the back in CP3 cryoplunge (Gatan) for 2s.
詳細
The RyR2 tetrameric channels formed channel-dimers with the nanobody at the dimer-interface bound to the repeat12 domain of the individual channels
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
特殊光学系
球面収差補正装置: Microscope was modified with a Cs corrector
撮影
フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 検出モード: INTEGRATING / 撮影したグリッド数: 1 / 実像数: 4088 / 平均電子線量: 47.0 e/Å2