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基本情報
登録情報 | データベース: PDB / ID: 6miz | ||||||
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タイトル | Human TRPM2 ion channel in an ADPR-bound state | ||||||
![]() | Transient receptor potential cation channel subfamily M member 2 | ||||||
![]() | MEMBRANE PROTEIN / Channel / TRPM2 / TRP / ADPR / ADP-ribose / NUDT9H / NUDT9 / calcium / ion channel | ||||||
機能・相同性 | ![]() mono-ADP-D-ribose binding / manganese ion transmembrane transporter activity / ligand-gated calcium channel activity / zinc ion transmembrane transport / dendritic cell differentiation / response to purine-containing compound / regulation of filopodium assembly / cellular response to temperature stimulus / dendritic cell chemotaxis / response to hydroperoxide ...mono-ADP-D-ribose binding / manganese ion transmembrane transporter activity / ligand-gated calcium channel activity / zinc ion transmembrane transport / dendritic cell differentiation / response to purine-containing compound / regulation of filopodium assembly / cellular response to temperature stimulus / dendritic cell chemotaxis / response to hydroperoxide / calcium ion transmembrane import into cytosol / TRP channels / temperature homeostasis / sodium channel activity / intracellularly gated calcium channel activity / tertiary granule membrane / calcium ion import across plasma membrane / ficolin-1-rich granule membrane / specific granule membrane / monoatomic cation channel activity / release of sequestered calcium ion into cytosol / cytoplasmic vesicle membrane / cellular response to calcium ion / cell projection / regulation of actin cytoskeleton organization / calcium ion transmembrane transport / calcium channel activity / cellular response to hydrogen peroxide / calcium ion transport / response to heat / protein homotetramerization / perikaryon / lysosome / lysosomal membrane / calcium ion binding / Neutrophil degranulation / plasma membrane 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: 6.1 Å | ||||||
![]() | Wang, L. / Fu, T.M. / Xia, S. / Wu, H. | ||||||
![]() | ![]() タイトル: Structures and gating mechanism of human TRPM2. 著者: Longfei Wang / Tian-Min Fu / Yiming Zhou / Shiyu Xia / Anna Greka / Hao Wu / ![]() 要旨: Transient receptor potential (TRP) melastatin 2 (TRPM2) is a cation channel associated with numerous diseases. It has a C-terminal NUDT9 homology (NUDT9H) domain responsible for binding adenosine ...Transient receptor potential (TRP) melastatin 2 (TRPM2) is a cation channel associated with numerous diseases. It has a C-terminal NUDT9 homology (NUDT9H) domain responsible for binding adenosine diphosphate (ADP)-ribose (ADPR), and both ADPR and calcium (Ca) are required for TRPM2 activation. Here we report cryo-electron microscopy structures of human TRPM2 alone, with ADPR, and with ADPR and Ca NUDT9H forms both intra- and intersubunit interactions with the N-terminal TRPM homology region (MHR1/2/3) in the apo state but undergoes conformational changes upon ADPR binding, resulting in rotation of MHR1/2 and disruption of the intersubunit interaction. The binding of Ca further engages transmembrane helices and the conserved TRP helix to cause conformational changes at the MHR arm and the lower gating pore to potentiate channel opening. These findings explain the molecular mechanism of concerted TRPM2 gating by ADPR and Ca and provide insights into the gating mechanism of other TRP channels. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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-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: 171416.188 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() Has protein modification | Y | |
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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 TRPM2 ion channel / タイプ: COMPLEX / Entity ID: all / 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: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: unspecified |
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 |
撮影 | 電子線照射量: 70.072 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.14_3260: / 分類: 精密化 |
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CTF補正 | タイプ: NONE |
3次元再構成 | 解像度: 6.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 49383 / 対称性のタイプ: POINT |