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基本情報
登録情報 | データベース: PDB / ID: 9lj5 | |||||||||||||||||||||
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タイトル | Human KCNQ5-CaM-PIP2-HN37 complex in an open conformation. | |||||||||||||||||||||
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![]() | MEMBRANE PROTEIN / voltage-gated potassium channel | |||||||||||||||||||||
機能・相同性 | ![]() clathrin coat / transporter inhibitor activity / Voltage gated Potassium channels / establishment of protein localization to mitochondrial membrane / type 3 metabotropic glutamate receptor binding / negative regulation of high voltage-gated calcium channel activity / response to corticosterone / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / nitric-oxide synthase binding ...clathrin coat / transporter inhibitor activity / Voltage gated Potassium channels / establishment of protein localization to mitochondrial membrane / type 3 metabotropic glutamate receptor binding / negative regulation of high voltage-gated calcium channel activity / response to corticosterone / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / nitric-oxide synthase binding / presynaptic endocytosis / regulation of cell communication by electrical coupling involved in cardiac conduction / calcineurin-mediated signaling / regulation of synaptic vesicle exocytosis / protein phosphatase activator activity / adenylate cyclase binding / voltage-gated potassium channel activity / catalytic complex / regulation of synaptic vesicle endocytosis / detection of calcium ion / postsynaptic cytosol / regulation of cardiac muscle contraction / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / presynaptic cytosol / phosphatidylinositol 3-kinase binding / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / titin binding / sperm midpiece / voltage-gated potassium channel complex / regulation of calcium-mediated signaling / potassium ion transmembrane transport / calcium channel complex / substantia nigra development / calcium channel regulator activity / response to amphetamine / nitric-oxide synthase regulator activity / regulation of heart rate / adenylate cyclase activator activity / calyx of Held / protein serine/threonine kinase activator activity / sarcomere / regulation of cytokinesis / spindle microtubule / mitochondrial membrane / Schaffer collateral - CA1 synapse / long-term synaptic potentiation / response to calcium ion / spindle pole / calcium-dependent protein binding / G2/M transition of mitotic cell cycle / synaptic vesicle membrane / myelin sheath / growth cone / vesicle / transmembrane transporter binding / G protein-coupled receptor signaling pathway / protein domain specific binding / centrosome / calcium ion binding / protein kinase binding / protein-containing complex / nucleus / plasma membrane / cytoplasm 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: 2.9 Å | |||||||||||||||||||||
![]() | Yang, Z. / Guo, J. | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Phosphatidylinositol 4,5-bisphosphate activation mechanism of human KCNQ5. 著者: Zhenni Yang / Yueming Zheng / Demin Ma / Long Wang / Jiatong Zhang / Tiefeng Song / Yong Wang / Yan Zhang / Fajun Nan / Nannan Su / Zhaobing Gao / Jiangtao Guo / ![]() 要旨: The human voltage-gated potassium channels KCNQ2, KCNQ3, and KCNQ5 can form homo- and heterotetrameric channels that are responsible for generating the neuronal M current and maintaining the membrane ...The human voltage-gated potassium channels KCNQ2, KCNQ3, and KCNQ5 can form homo- and heterotetrameric channels that are responsible for generating the neuronal M current and maintaining the membrane potential stable. Activation of KCNQ channels requires both the depolarization of membrane potential and phosphatidylinositol 4,5-bisphosphate (PIP). Here, we report cryoelectron microscopy structures of the human KCNQ5-calmodulin (CaM) complex in the apo, PIP-bound, and both PIP- and the activator HN37-bound states in either a closed or an open conformation. In the closed conformation, a PIP molecule binds in the middle of the groove between two adjacent voltage-sensing domains (VSDs), whereas in the open conformation, one additional PIP binds to the interface of VSD and the pore domain, accompanying structural rearrangement of the cytosolic domain of KCNQ and CaM. The structures, along with electrophysiology analyses, reveal the two different binding modes of PIP and elucidate the PIP activation mechanism of KCNQ5. | |||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 751.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 629.7 KB | 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 | ![]() | 73.3 KB | 表示 | |
CIF形式データ | ![]() | 98.6 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
#1: タンパク質 | 分子量: 70463.289 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #2: タンパク質 | 分子量: 19615.445 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #3: 化合物 | ChemComp-PIO / [( #4: 化合物 | ChemComp-9MF / 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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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: Human KCNQ5-CaM-PIP2-HN37 complex / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 8 |
試料 | 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: TFS 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): 1600 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm |
撮影 | 電子線照射量: 52 e/Å2 フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 244993 / 対称性のタイプ: POINT |