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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 8t6k | ||||||
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| タイトル | Cryo-EM structure of tetradecameric CaMKII beta holoenzyme T287A T306A T307A | ||||||
要素 | Venus-tagged CaMKII Beta Holoenzyme mutant | ||||||
キーワード | SIGNALING PROTEIN / High-order oligomer / Protein Kinase / Signaling / Memory | ||||||
| 機能・相同性 | 機能・相同性情報regulation of synaptic transmission, cholinergic / activation of meiosis involved in egg activation / cellular response to homocysteine / HSF1-dependent transactivation / cell projection morphogenesis / RAF activation / Ion transport by P-type ATPases / calcium- and calmodulin-dependent protein kinase complex / positive regulation of synapse maturation / Interferon gamma signaling ...regulation of synaptic transmission, cholinergic / activation of meiosis involved in egg activation / cellular response to homocysteine / HSF1-dependent transactivation / cell projection morphogenesis / RAF activation / Ion transport by P-type ATPases / calcium- and calmodulin-dependent protein kinase complex / positive regulation of synapse maturation / Interferon gamma signaling / Ca2+/calmodulin-dependent protein kinase / structural constituent of postsynaptic actin cytoskeleton / positive regulation of dendritic spine morphogenesis / Trafficking of AMPA receptors / regulation of synapse maturation / regulation of neuron migration / calcium/calmodulin-dependent protein kinase activity / hippocampal neuron apoptotic process / RAF/MAP kinase cascade / Ion homeostasis / neuromuscular process controlling balance / response to psychosocial stress / spindle midzone / Unblocking of NMDA receptors, glutamate binding and activation / regulation of neuronal synaptic plasticity / response to cadmium ion / regulation of protein localization to plasma membrane / phospholipase binding / sarcoplasmic reticulum membrane / bioluminescence / positive regulation of apoptotic signaling pathway / generation of precursor metabolites and energy / G1/S transition of mitotic cell cycle / positive regulation of neuron projection development / regulation of long-term neuronal synaptic plasticity / calcium ion transport / protein autophosphorylation / long-term synaptic potentiation / nervous system development / perikaryon / calmodulin binding / cell differentiation / neuron projection / postsynaptic density / protein serine kinase activity / protein serine/threonine kinase activity / centrosome / dendrite / protein kinase binding / glutamatergic synapse / protein homodimerization activity / ATP binding / identical protein binding / cytoplasm / cytosol 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 Å | ||||||
データ登録者 | Chien, C.-T. / Chiu, W. / Khan, S. | ||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Commun Biol / 年: 2024タイトル: Hub stability in the calcium calmodulin-dependent protein kinase II. 著者: Chih-Ta Chien / Henry Puhl / Steven S Vogel / Justin E Molloy / Wah Chiu / Shahid Khan / ![]() 要旨: The calcium calmodulin protein kinase II (CaMKII) is a multi-subunit ring assembly with a central hub formed by the association domains. There is evidence for hub polymorphism between and within ...The calcium calmodulin protein kinase II (CaMKII) is a multi-subunit ring assembly with a central hub formed by the association domains. There is evidence for hub polymorphism between and within CaMKII isoforms, but the link between polymorphism and subunit exchange has not been resolved. Here, we present near-atomic resolution cryogenic electron microscopy (cryo-EM) structures revealing that hubs from the α and β isoforms, either standalone or within an β holoenzyme, coexist as 12 and 14 subunit assemblies. Single-molecule fluorescence microscopy of Venus-tagged holoenzymes detects intermediate assemblies and progressive dimer loss due to intrinsic holoenzyme lability, and holoenzyme disassembly into dimers upon mutagenesis of a conserved inter-domain contact. Molecular dynamics (MD) simulations show the flexibility of 4-subunit precursors, extracted in-silico from the β hub polymorphs, encompassing the curvature of both polymorphs. The MD explains how an open hub structure also obtained from the β holoenzyme sample could be created by dimer loss and analysis of its cryo-EM dataset reveals how the gap could open further. An assembly model, considering dimer concentration dependence and strain differences between polymorphs, proposes a mechanism for intrinsic hub lability to fine-tune the stoichiometry of αβ heterooligomers for their dynamic localization within synapses in neurons. | ||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 8t6k.cif.gz | 830.6 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8t6k.ent.gz | 606.7 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8t6k.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/t6/8t6k ftp://data.pdbj.org/pub/pdb/validation_reports/t6/8t6k | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 41070MC ![]() 8sygC ![]() 8t15C ![]() 8t17C ![]() 8t18C ![]() 8t6qC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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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
| #1: タンパク質 | 分子量: 90846.859 Da / 分子数: 14 / 変異: T287A T306A T307A / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: GFP, Camk2b / 発現宿主: ![]() |
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-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: Venus-tagged CaMKII Beta Holoenzyme T287A T306A T307A タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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| 分子量 | 実験値: NO |
| 由来(天然) | 生物種: ![]() |
| 由来(組換発現) | 生物種: ![]() |
| 緩衝液 | pH: 7.5 |
| 試料 | 濃度: 20 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 / 湿度: 100 % / 凍結前の試料温度: 277 K |
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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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 600 nm |
| 撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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| 対称性 | 点対称性: D7 (2回x7回 2面回転対称) | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 138904 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
| 原子変位パラメータ | Biso mean: 40.27 Å2 | ||||||||||||||||||||||||
| 拘束条件 |
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米国, 1件
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FIELD EMISSION GUN