+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8syg | ||||||
---|---|---|---|---|---|---|---|
タイトル | Cryo-EM structure of tetradecameric hub domain of CaMKII alpha | ||||||
要素 | Venus-tagged CaMKII Alpha Association Domain | ||||||
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 vesicle docking / HSF1-dependent transactivation / RAF activation / glutamatergic postsynaptic density / Ion transport by P-type ATPases / peptidyl-threonine autophosphorylation / regulation of endocannabinoid signaling pathway / neurotransmitter receptor transport to plasma membrane / : / calcium- and calmodulin-dependent protein kinase complex ...regulation of synaptic vesicle docking / HSF1-dependent transactivation / RAF activation / glutamatergic postsynaptic density / Ion transport by P-type ATPases / peptidyl-threonine autophosphorylation / regulation of endocannabinoid signaling pathway / neurotransmitter receptor transport to plasma membrane / : / calcium- and calmodulin-dependent protein kinase complex / Interferon gamma signaling / calcium-dependent protein serine/threonine kinase activity / Ca2+/calmodulin-dependent protein kinase / regulation of neurotransmitter secretion / regulation of neuron migration / dendritic spine development / Trafficking of AMPA receptors / positive regulation of calcium ion transport / Ca2+ pathway / negative regulation of hydrolase activity / postsynaptic neurotransmitter receptor diffusion trapping / NMDA selective glutamate receptor signaling pathway / presynaptic cytosol / GTPase activating protein binding / calcium/calmodulin-dependent protein kinase activity / RAF/MAP kinase cascade / postsynaptic specialization membrane / regulation of mitochondrial membrane permeability involved in apoptotic process / dendrite morphogenesis / regulation of neurotransmitter receptor localization to postsynaptic specialization membrane / Ion homeostasis / postsynaptic cytosol / positive regulation of cardiac muscle cell apoptotic process / regulation of neuronal synaptic plasticity / Unblocking of NMDA receptors, glutamate binding and activation / regulation of protein localization to plasma membrane / glutamate receptor binding / cellular response to interferon-beta / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / bioluminescence / generation of precursor metabolites and energy / response to ischemia / angiotensin-activated signaling pathway / positive regulation of receptor signaling pathway via JAK-STAT / Schaffer collateral - CA1 synapse / cellular response to type II interferon / G1/S transition of mitotic cell cycle / calcium ion transport / kinase activity / dendritic spine / postsynaptic density / calmodulin binding / neuron projection / protein phosphorylation / axon / protein serine kinase activity / protein serine/threonine kinase activity / neuronal cell body / glutamatergic synapse / dendrite / synapse / protein homodimerization activity / mitochondrion / ATP binding / identical protein binding / metal ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | Aequorea victoria (オワンクラゲ) Rattus norvegicus (ドブネズミ) | ||||||
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: 2.6 Å | ||||||
データ登録者 | Chien, C.-T. / Chiu, W. / Khan, S. | ||||||
資金援助 | 米国, 1件
| ||||||
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. | ||||||
履歴 |
|
-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
---|
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8syg.cif.gz | 711.8 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb8syg.ent.gz | 585.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8syg.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
文書・要旨 | 8syg_validation.pdf.gz | 1.2 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 8syg_full_validation.pdf.gz | 1.2 MB | 表示 | |
XML形式データ | 8syg_validation.xml.gz | 43.7 KB | 表示 | |
CIF形式データ | 8syg_validation.cif.gz | 73.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/sy/8syg ftp://data.pdbj.org/pub/pdb/validation_reports/sy/8syg | HTTPS FTP |
-関連構造データ
関連構造データ | 40873MC 8t15C 8t17C 8t18C 8t6kC 8t6qC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
---|---|
類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 45877.539 Da / 分子数: 14 / 由来タイプ: 組換発現 由来: (組換発現) Aequorea victoria (オワンクラゲ), (組換発現) Rattus norvegicus (ドブネズミ) 遺伝子: Camk2a / 発現宿主: Escherichia coli (大腸菌) 参照: UniProt: P42212, UniProt: P11275, Ca2+/calmodulin-dependent protein kinase |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
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 |
-試料調製
構成要素 | 名称: Venus-tagged CaMKII Alpha Association Domain / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
---|---|
分子量 | 実験値: NO |
由来(天然) | 生物種: Rattus norvegicus (ドブネズミ) |
由来(組換発現) | 生物種: Escherichia coli (大腸菌) |
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 |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
---|---|
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: FEI FALCON IV (4k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
---|---|
3次元再構成 | 解像度: 2.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 205902 / 対称性のタイプ: POINT |