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基本情報
登録情報 | データベース: PDB / ID: 8duj | |||||||||
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タイトル | Global map in C1 of RyR1 particles in complex with ImperaCalcin | |||||||||
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![]() | MEMBRANE PROTEIN / ryanodine receptor / ion channel / snake toxin / calcin / complex / toxin | |||||||||
機能・相同性 | ![]() ATP-gated ion channel activity / positive regulation of sequestering of calcium ion / negative regulation of calcium-mediated signaling / 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 / terminal cisterna / insulin secretion involved in cellular response to glucose stimulus / ryanodine receptor complex / ryanodine-sensitive calcium-release channel activity ...ATP-gated ion channel activity / positive regulation of sequestering of calcium ion / negative regulation of calcium-mediated signaling / 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 / terminal cisterna / insulin secretion involved in cellular response to glucose stimulus / ryanodine receptor complex / ryanodine-sensitive calcium-release channel activity / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Calmodulin induced events / response to redox state / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / ossification involved in bone maturation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Loss of phosphorylation of MECP2 at T308 / 'de novo' protein folding / CREB1 phosphorylation through the activation of Adenylate Cyclase / cellular response to caffeine / CaMK IV-mediated phosphorylation of CREB / PKA activation / negative regulation of high voltage-gated calcium channel activity / negative regulation of heart rate / Glycogen breakdown (glycogenolysis) / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / skin development / negative regulation of ryanodine-sensitive calcium-release channel activity / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / FK506 binding / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / presynaptic endocytosis / organelle membrane / Synthesis of IP3 and IP4 in the cytosol / regulation of cell communication by electrical coupling involved in cardiac conduction / Phase 0 - rapid depolarisation / calcineurin-mediated signaling / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / RHO GTPases activate PAKs / smooth endoplasmic reticulum / intracellularly gated calcium channel activity / Ion transport by P-type ATPases / outflow tract morphogenesis / Uptake and function of anthrax toxins / regulation of ryanodine-sensitive calcium-release channel activity / Long-term potentiation / protein phosphatase activator activity / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / smooth muscle contraction / DARPP-32 events / catalytic complex / Smooth Muscle Contraction / detection of calcium ion / regulation of cardiac muscle contraction / RHO GTPases activate IQGAPs / toxic substance binding / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / T cell proliferation / striated muscle contraction / voltage-gated calcium channel activity / cellular response to interferon-beta / Protein methylation / calcium channel inhibitor activity / presynaptic cytosol / Activation of AMPK downstream of NMDARs / skeletal muscle fiber development / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / eNOS activation / titin binding / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / sperm midpiece / regulation of calcium-mediated signaling / release of sequestered calcium ion into cytosol / voltage-gated potassium channel complex / calcium channel complex / substantia nigra development / FCERI mediated Ca+2 mobilization / sarcoplasmic reticulum membrane / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / muscle contraction / FCGR3A-mediated IL10 synthesis / calyx of Held / cellular response to calcium ion / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / sarcoplasmic reticulum / adenylate cyclase activator activity / protein maturation / sarcomere 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() ![]() | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.7 Å | |||||||||
![]() | Haji-Ghassemi, O. / Van Petegm, F. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM analysis of scorpion toxin binding to Ryanodine Receptors reveals subconductance that is abolished by PKA phosphorylation. 著者: Omid Haji-Ghassemi / Yu Seby Chen / Kellie Woll / Georgina B Gurrola / Carmen R Valdivia / Wenxuan Cai / Songhua Li / Hector H Valdivia / Filip Van Petegem / ![]() ![]() ![]() ![]() 要旨: Calcins are peptides from scorpion venom with the unique ability to cross cell membranes, gaining access to intracellular targets. Ryanodine Receptors (RyR) are intracellular ion channels that ...Calcins are peptides from scorpion venom with the unique ability to cross cell membranes, gaining access to intracellular targets. Ryanodine Receptors (RyR) are intracellular ion channels that control release of Ca from the endoplasmic and sarcoplasmic reticulum. Calcins target RyRs and induce long-lived subconductance states, whereby single-channel currents are decreased. We used cryo-electron microscopy to reveal the binding and structural effects of imperacalcin, showing that it opens the channel pore and causes large asymmetry throughout the cytosolic assembly of the tetrameric RyR. This also creates multiple extended ion conduction pathways beyond the transmembrane region, resulting in subconductance. Phosphorylation of imperacalcin by protein kinase A prevents its binding to RyR through direct steric hindrance, showing how posttranslational modifications made by the host organism can determine the fate of a natural toxin. The structure provides a direct template for developing calcin analogs that result in full channel block, with potential to treat RyR-related disorders. | |||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 2.5 MB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.8 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.9 MB | 表示 | |
XML形式データ | ![]() | 362.7 KB | 表示 | |
CIF形式データ | ![]() | 580.5 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
-タンパク質・ペプチド , 1種, 1分子 M
#1: タンパク質・ペプチド | 分子量: 3776.495 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() |
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-タンパク質 , 3種, 12分子 GADJHBEKICFL
#2: タンパク質 | 分子量: 565908.625 Da / 分子数: 4 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #3: タンパク質 | 分子量: 11667.305 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #4: タンパク質 | 分子量: 16620.402 Da / 分子数: 4 / Mutation: E32A, E68A, E105A, E141A / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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-非ポリマー , 4種, 16分子 






#5: 化合物 | ChemComp-CFF / #6: 化合物 | ChemComp-CA / #7: 化合物 | ChemComp-ATP / #8: 化合物 | ChemComp-ZN / |
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-詳細
研究の焦点であるリガンドがあるか | N |
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Has protein modification | Y |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: RyR1 in complex with ImperaCalcin in presence of Caffeine/CaM1234/Calcium/ATP タイプ: COMPLEX / Entity ID: #1-#4 / 由来: MULTIPLE SOURCES | ||||||||||||||||
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分子量 | 値: 2.2 MDa / 実験値: YES | ||||||||||||||||
由来(天然) |
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緩衝液 | pH: 7.4 | ||||||||||||||||
試料 | 濃度: 10 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||
急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm |
撮影 | 電子線照射量: 50 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) |
画像スキャン | 横: 4096 / 縦: 4096 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 144529 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 6M2W Accession code: 6M2W / Source name: PDB / タイプ: experimental model |