- EMDB-40957: Cryo-EM structure of dodecameric hub domain of CaMKII beta -
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データベース: EMDB / ID: EMD-40957
タイトル
Cryo-EM structure of dodecameric hub domain of CaMKII beta
マップデータ
試料
複合体: Venus-tagged CaMKII Beta Association Domain
タンパク質・ペプチド: Venus-tagged CaMKII Alpha Association Domain
キーワード
High-order oligomer / Protein Kinase / Signaling / Memory / SIGNALING PROTEIN
機能・相同性
機能・相同性情報
regulation of synaptic transmission, cholinergic / activation of meiosis involved in egg activation / cell projection morphogenesis / HSF1-dependent transactivation / RAF activation / Ion transport by P-type ATPases / hippocampal neuron apoptotic process / calcium- and calmodulin-dependent protein kinase complex / cellular response to homocysteine / Interferon gamma signaling ...regulation of synaptic transmission, cholinergic / activation of meiosis involved in egg activation / cell projection morphogenesis / HSF1-dependent transactivation / RAF activation / Ion transport by P-type ATPases / hippocampal neuron apoptotic process / calcium- and calmodulin-dependent protein kinase complex / cellular response to homocysteine / Interferon gamma signaling / positive regulation of synapse maturation / calcium-dependent protein serine/threonine kinase activity / Ca2+/calmodulin-dependent protein kinase / structural constituent of postsynaptic actin cytoskeleton / regulation of neuron migration / positive regulation of dendritic spine morphogenesis / Trafficking of AMPA receptors / regulation of synapse maturation / calcium/calmodulin-dependent protein kinase activity / RAF/MAP kinase cascade / Ion homeostasis / response to psychosocial stress / phospholipase binding / neuromuscular process controlling balance / Unblocking of NMDA receptors, glutamate binding and activation / regulation of protein localization to plasma membrane / spindle midzone / response to cadmium ion / sarcoplasmic reticulum membrane / bioluminescence / apoptotic signaling pathway / generation of precursor metabolites and energy / long-term synaptic potentiation / positive regulation of apoptotic signaling pathway / regulation of long-term neuronal synaptic plasticity / positive regulation of neuron projection development / G1/S transition of mitotic cell cycle / calcium ion transport / nervous system development / perikaryon / protein autophosphorylation / postsynaptic density / cell differentiation / calmodulin binding / neuron projection / protein serine kinase activity / protein serine/threonine kinase activity / centrosome / glutamatergic synapse / dendrite / protein kinase binding / protein homodimerization activity / ATP binding / identical protein binding / cytosol / cytoplasm 類似検索 - 分子機能
Calcium/calmodulin-dependent protein kinase II, association-domain / Calcium/calmodulin dependent protein kinase II association domain / NTF2-like domain superfamily / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain ...Calcium/calmodulin-dependent protein kinase II, association-domain / Calcium/calmodulin dependent protein kinase II association domain / NTF2-like domain superfamily / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily 類似検索 - ドメイン・相同性
Calcium/calmodulin-dependent protein kinase type II subunit beta / Green fluorescent protein 類似検索 - 構成要素
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.