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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: 9lev | ||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of human ZAC in nanodisc in apo state | ||||||||||||||||||||||||
要素 | Ligand-gated cation channel ZACN,Genome polyprotein | ||||||||||||||||||||||||
キーワード | MEMBRANE PROTEIN / Cys-loop receptor / homopentamer / cation channel | ||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報pH-gated monoatomic ion channel activity / transmembrane transporter complex / response to zinc ion / ligand-gated monoatomic cation channel activity / ligand-gated monoatomic ion channel activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / extracellular ligand-gated monoatomic ion channel activity / bioluminescence / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus ...pH-gated monoatomic ion channel activity / transmembrane transporter complex / response to zinc ion / ligand-gated monoatomic cation channel activity / ligand-gated monoatomic ion channel activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / extracellular ligand-gated monoatomic ion channel activity / bioluminescence / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / generation of precursor metabolites and energy / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / ribonucleoside triphosphate phosphatase activity / transmembrane signaling receptor activity / nucleoside-triphosphate phosphatase / channel activity / monoatomic ion transmembrane transport / DNA replication / RNA helicase activity / endocytosis involved in viral entry into host cell / symbiont-mediated activation of host autophagy / RNA-directed RNA polymerase / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / virion attachment to host cell / host cell nucleus / structural molecule activity / proteolysis / RNA binding / zinc ion binding / ATP binding / plasma membrane 類似検索 - 分子機能 | ||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() Enterovirus A71 (エンテロウイルス) | ||||||||||||||||||||||||
| 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: 3.35 Å | ||||||||||||||||||||||||
データ登録者 | Qu, Q. / Zhou, Z. | ||||||||||||||||||||||||
| 資金援助 | 中国, 3件
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引用 | ジャーナル: Cell Discov / 年: 2026タイトル: Structural basis of human zinc-activated channel (ZAC) signaling and modulation. 著者: Zixuan Zhou / Yonghui Long / Yulin Chao / Chuanhui Yang / Yi-Quan Tang / Yilai Shu / Hongtao Zhu / Anders A Jensen / Qianhui Qu / ![]() 要旨: Zinc (Zn) plays essential roles in a plethora of physiological processes, including key functions as a neuromodulator. The zinc-activated channel (ZAC) belongs to the Cys-loop receptor (CLR) ...Zinc (Zn) plays essential roles in a plethora of physiological processes, including key functions as a neuromodulator. The zinc-activated channel (ZAC) belongs to the Cys-loop receptor (CLR) superfamily of pentameric ligand-gated ion channels, which also comprises receptors for the important neurotransmitters acetylcholine, serotonin, GABA and glycine. In contrast to these classical CLRs, which have been extensively explored over decades, ZAC remains poorly characterized despite its potential significance in mammals. Here, we present several cryo-EM structures of human ZAC, including the ligand-free resting state, the Zn-bound state, and several antagonist-bound states. In the Zn-bound structure, Zn ions bind to the subunit interfaces of the extracellular domain, corresponding to the canonical agonist-binding sites in the classical CLRs, and are primarily coordinated through cation‒π interactions with two aromatic residues. While the antagonist TTFB inhibits ZAC by insertion between the transmembrane M2 helices of adjacent subunits, d-tubocurarine acts in a dual manner by blocking the channel and interfering with agonist binding. Combined with mutagenesis and electrophysiological analysis, these evaluations highlight the distinctive structural and functional features of this atypical CLR. | ||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9lev.cif.gz | 307.5 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9lev.ent.gz | 238.5 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9lev.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/le/9lev ftp://data.pdbj.org/pub/pdb/validation_reports/le/9lev | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 63035MC ![]() 9letC ![]() 9leuC ![]() 9lexC ![]() 9leyC ![]() 9lezC 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 F&H 検索 |
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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: 78830.859 Da / 分子数: 5 / 変異: A152T / 由来タイプ: 組換発現 由来: (組換発現) Homo sapiens (ヒト), (組換発現) ![]() Enterovirus A71 (エンテロウイルス)遺伝子: ZACN, L2, LGICZ, LGICZ1, ZAC / 細胞株 (発現宿主): HEK293F / 発現宿主: Homo sapiens (ヒト)参照: UniProt: Q401N2, UniProt: B6F2F5, picornain 2A, nucleoside-triphosphate phosphatase, picornain 3C, RNA-directed RNA polymerase #2: 多糖 | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #3: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose 研究の焦点であるリガンドがあるか | N | 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: ZAC in apo state / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 緩衝液 | pH: 8 |
| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
| 急速凍結 | 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
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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: 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): 2000 nm / 最小 デフォーカス(公称値): 1500 nm / Cs: 2.7 mm |
| 撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.35 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 16419 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL | ||||||||||||||||||||||||
| 精密化 | 最高解像度: 3.35 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||
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ムービー
コントローラー
万見について




Homo sapiens (ヒト)
Enterovirus A71 (エンテロウイルス)
中国, 3件
引用











PDBj







FIELD EMISSION GUN