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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: 9ezc | ||||||
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タイトル | Structure of the extracellular subdomain of a homomeric LRRC8C truncation disease mutant | ||||||
![]() | Volume-regulated anion channel subunit LRRC8C | ||||||
![]() | MEMBRANE PROTEIN / Anion channel / Volume regulation / disease mutation | ||||||
機能・相同性 | ![]() Miscellaneous transport and binding events / volume-sensitive anion channel activity / aspartate transmembrane transport / taurine transmembrane transport / cyclic-GMP-AMP transmembrane import across plasma membrane / monoatomic anion transmembrane transport / protein hexamerization / cellular response to osmotic stress / fat cell differentiation / monoatomic ion channel complex ...Miscellaneous transport and binding events / volume-sensitive anion channel activity / aspartate transmembrane transport / taurine transmembrane transport / cyclic-GMP-AMP transmembrane import across plasma membrane / monoatomic anion transmembrane transport / protein hexamerization / cellular response to osmotic stress / fat cell differentiation / monoatomic ion channel complex / intracellular signal transduction / endoplasmic reticulum membrane / membrane / 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: 3.41 Å | ||||||
![]() | Rutz, S. / Quinodoz, M. / Peter, V. / Garavelli, L. / Innes, M.A. / Kellenberger, S. / Peng, Z. / Barone, A. / Campos-Xavier, B. / Unger, S. ...Rutz, S. / Quinodoz, M. / Peter, V. / Garavelli, L. / Innes, M.A. / Kellenberger, S. / Peng, Z. / Barone, A. / Campos-Xavier, B. / Unger, S. / Rivolta, C. / Dutzler, R. / Superti-Furga, A. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: De novo variants in LRRC8C resulting in constitutive channel activation cause a human multisystem disorder. 著者: Mathieu Quinodoz / Sonja Rutz / Virginie Peter / Livia Garavelli / A Micheil Innes / Elena F Lehmann / Stephan Kellenberger / Zhong Peng / Angelica Barone / Belinda Campos-Xavier / Sheila ...著者: Mathieu Quinodoz / Sonja Rutz / Virginie Peter / Livia Garavelli / A Micheil Innes / Elena F Lehmann / Stephan Kellenberger / Zhong Peng / Angelica Barone / Belinda Campos-Xavier / Sheila Unger / Carlo Rivolta / Raimund Dutzler / Andrea Superti-Furga / ![]() ![]() ![]() ![]() 要旨: Volume-regulated anion channels (VRACs) are multimeric proteins composed of different paralogs of the LRRC8 family. They are activated in response to hypotonic swelling, but little is known about ...Volume-regulated anion channels (VRACs) are multimeric proteins composed of different paralogs of the LRRC8 family. They are activated in response to hypotonic swelling, but little is known about their specific functions. We studied two human individuals with the same congenital syndrome affecting blood vessels, brain, eyes, and bones. The LRRC8C gene harbored de novo variants in both patients, located in a region of the gene encoding the boundary between the pore and a cytoplasmic domain, which is depleted of sequence variations in control subjects. When studied by cryo-EM, both LRRC8C mutant proteins assembled as their wild-type counterparts, but showed increased flexibility, suggesting a destabilization of subunit interactions. When co-expressed with the obligatory LRRC8A subunit, the mutants exhibited enhanced activation, resulting in channel activity even at isotonic conditions in which wild-type channels are closed. We conclude that structural perturbations of LRRC8C impair channel gating and constitute the mechanistic basis of the dominant gain-of-function effect of these pathogenic variants. The pleiotropic phenotype of this novel clinical entity associated with monoallelic LRRC8C variants indicates the fundamental roles of VRACs in different tissues and organs. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 211.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 127.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 50072MC ![]() 8rtsC ![]() 9f16C 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 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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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: 47719.941 Da / 分子数: 7 / 変異: Leu400IlefsTer8 / 由来タイプ: 組換発現 詳細: The compound only shows the extracellular subdomain (ESD) of the channel 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: Homomeric LRRC8C truncation disease mutant / 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: 8.5 |
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-PROPANE |
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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): 2400 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 65 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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3次元再構成 | 解像度: 3.41 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 224687 / 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: 50.47 Å2 | ||||||||||||||||||||||||
拘束条件 |
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