+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8uc7 | ||||||
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タイトル | HCN1 complex with propofol | ||||||
要素 | Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1 | ||||||
キーワード | TRANSPORT PROTEIN/INHIBITOR / inhibitor / complex / plasma membrane / cyclic nucleotide / TRANSPORT PROTEIN-INHIBITOR complex | ||||||
機能・相同性 | 機能・相同性情報 intracellular cAMP-activated cation channel activity involved in regulation of presynaptic membrane potential / HCN channels / general adaptation syndrome, behavioral process / HCN channel complex / retinal cone cell development / intracellularly cAMP-activated cation channel activity / regulation of membrane depolarization / apical protein localization / voltage-gated monoatomic cation channel activity / voltage-gated sodium channel activity ...intracellular cAMP-activated cation channel activity involved in regulation of presynaptic membrane potential / HCN channels / general adaptation syndrome, behavioral process / HCN channel complex / retinal cone cell development / intracellularly cAMP-activated cation channel activity / regulation of membrane depolarization / apical protein localization / voltage-gated monoatomic cation channel activity / voltage-gated sodium channel activity / voltage-gated potassium channel activity / potassium channel activity / neuronal action potential / sodium ion transmembrane transport / cAMP binding / presynaptic active zone membrane / cellular response to cAMP / potassium ion transmembrane transport / regulation of membrane potential / postsynaptic membrane / protein homotetramerization / axon / glutamatergic synapse / dendrite / identical protein binding / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) | ||||||
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 | ||||||
データ登録者 | Kim, E.D. / Nimigean, C.M. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Nature / 年: 2024 タイトル: Propofol rescues voltage-dependent gating of HCN1 channel epilepsy mutants. 著者: Elizabeth D Kim / Xiaoan Wu / Sangyun Lee / Gareth R Tibbs / Kevin P Cunningham / Eleonora Di Zanni / Marta E Perez / Peter A Goldstein / Alessio Accardi / H Peter Larsson / Crina M Nimigean / 要旨: Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are essential for pacemaking activity and neural signalling. Drugs inhibiting HCN1 are promising candidates for management of ...Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are essential for pacemaking activity and neural signalling. Drugs inhibiting HCN1 are promising candidates for management of neuropathic pain and epileptic seizures. The general anaesthetic propofol (2,6-di-iso-propylphenol) is a known HCN1 allosteric inhibitor with unknown structural basis. Here, using single-particle cryo-electron microscopy and electrophysiology, we show that propofol inhibits HCN1 by binding to a mechanistic hotspot in a groove between the S5 and S6 transmembrane helices. We found that propofol restored voltage-dependent closing in two HCN1 epilepsy-associated polymorphisms that act by destabilizing the channel closed state: M305L, located in the propofol-binding site in S5, and D401H in S6 (refs. ). To understand the mechanism of propofol inhibition and restoration of voltage-gating, we tracked voltage-sensor movement in spHCN channels and found that propofol inhibition is independent of voltage-sensor conformational changes. Mutations at the homologous methionine in spHCN and an adjacent conserved phenylalanine in S6 similarly destabilize closing without disrupting voltage-sensor movements, indicating that voltage-dependent closure requires this interface intact. We propose a model for voltage-dependent gating in which propofol stabilizes coupling between the voltage sensor and pore at this conserved methionine-phenylalanine interface in HCN channels. These findings unlock potential exploitation of this site to design specific drugs targeting HCN channelopathies. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8uc7.cif.gz | 384.3 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8uc7.ent.gz | 302.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8uc7.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
文書・要旨 | 8uc7_validation.pdf.gz | 1.4 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8uc7_full_validation.pdf.gz | 1.5 MB | 表示 | |
XML形式データ | 8uc7_validation.xml.gz | 67 KB | 表示 | |
CIF形式データ | 8uc7_validation.cif.gz | 98.3 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/uc/8uc7 ftp://data.pdbj.org/pub/pdb/validation_reports/uc/8uc7 | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 74643.734 Da / 分子数: 4 / 断片: UNP residues 1-635,866-890 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: HCN1, BCNG1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O60741 #2: 化合物 | ChemComp-PFL / #3: 化合物 | ChemComp-PCW / 研究の焦点であるリガンドがあるか | 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 |
-試料調製
構成要素 | 名称: HCN1 with propofol / 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 |
急速凍結 | 凍結剤: ETHANE |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: OTHER |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 52.53 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-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: 415000 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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