+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8epm | |||||||||
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タイトル | Human R-type voltage-gated calcium channel Cav2.3 CH2II-deleted mutant at 3.1 Angstrom resolution | |||||||||
要素 | (Voltage-dependent ...) x 2 | |||||||||
キーワード | TRANSPORT PROTEIN / Cav2.3 / Channels / Calcium Ion-Selective | |||||||||
機能・相同性 | 機能・相同性情報 regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / positive regulation of high voltage-gated calcium channel activity / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during bundle of His cell action potential / high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / cardiac muscle cell action potential involved in contraction / regulation of ventricular cardiac muscle cell membrane repolarization / voltage-gated monoatomic cation channel activity ...regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / positive regulation of high voltage-gated calcium channel activity / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during bundle of His cell action potential / high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / cardiac muscle cell action potential involved in contraction / regulation of ventricular cardiac muscle cell membrane repolarization / voltage-gated monoatomic cation channel activity / calcium ion transport into cytosol / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / voltage-gated calcium channel complex / calcium ion import across plasma membrane / neuronal dense core vesicle / regulation of heart rate by cardiac conduction / regulation of calcium ion transport / voltage-gated calcium channel activity / sarcoplasmic reticulum / Regulation of insulin secretion / cellular response to amyloid-beta / calcium ion transport / chemical synaptic transmission / neuronal cell body / calcium ion binding / synapse / extracellular exosome / metal ion 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: 3.1 Å | |||||||||
データ登録者 | Gao, S. / Yao, X. / Yan, N. | |||||||||
資金援助 | 米国, 2件
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引用 | ジャーナル: Nat Commun / 年: 2022 タイトル: Structures of the R-type human Ca2.3 channel reveal conformational crosstalk of the intracellular segments. 著者: Xia Yao / Yan Wang / Zhifei Wang / Xiao Fan / Di Wu / Jian Huang / Alexander Mueller / Sarah Gao / Miaohui Hu / Carol V Robinson / Yong Yu / Shuai Gao / Nieng Yan / 要旨: The R-type voltage-gated Ca (Ca) channels Ca2.3, widely expressed in neuronal and neuroendocrine cells, represent potential drug targets for pain, seizures, epilepsy, and Parkinson's disease. Despite ...The R-type voltage-gated Ca (Ca) channels Ca2.3, widely expressed in neuronal and neuroendocrine cells, represent potential drug targets for pain, seizures, epilepsy, and Parkinson's disease. Despite their physiological importance, there have lacked selective small-molecule inhibitors targeting these channels. High-resolution structures may aid rational drug design. Here, we report the cryo-EM structure of human Ca2.3 in complex with α2δ-1 and β3 subunits at an overall resolution of 3.1 Å. The structure is nearly identical to that of Ca2.2, with VSD in the down state and the other three VSDs up. A phosphatidylinositol 4,5-bisphosphate (PIP2) molecule binds to the interface of VSD and the tightly closed pore domain. We also determined the cryo-EM structure of a Ca2.3 mutant in which a Ca2-unique cytosolic helix in repeat II (designated the CH2 helix) is deleted. This mutant, named ΔCH2, still reserves a down VSD, but PIP2 is invisible and the juxtamembrane region on the cytosolic side is barely discernible. Our structural and electrophysiological characterizations of the wild type and ΔCH2 Ca2.3 show that the CH2 helix stabilizes the inactivated conformation of the channel by tightening the cytosolic juxtamembrane segments, while CH2 helix is not necessary for locking the down state of VSD. | |||||||||
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 | 8epm.cif.gz | 419.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8epm.ent.gz | 321.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8epm.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 | 8epm_validation.pdf.gz | 1.7 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8epm_full_validation.pdf.gz | 1.7 MB | 表示 | |
XML形式データ | 8epm_validation.xml.gz | 60.9 KB | 表示 | |
CIF形式データ | 8epm_validation.cif.gz | 90 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ep/8epm ftp://data.pdbj.org/pub/pdb/validation_reports/ep/8epm | HTTPS FTP |
-関連構造データ
関連構造データ | 28530MC 8eplC 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
-Voltage-dependent ... , 2種, 2分子 AC
#1: タンパク質 | 分子量: 262055.984 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CACNA1E, CACH6, CACNL1A6 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q15878 |
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#2: タンパク質 | 分子量: 124692.469 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CACNA2D1, CACNL2A, CCHL2A, MHS3 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P54289 |
-糖 , 3種, 8分子
#3: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #4: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #6: 糖 | |
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-非ポリマー , 1種, 2分子
#5: 化合物 |
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-詳細
研究の焦点であるリガンドがあるか | 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 |
-試料調製
構成要素 | 名称: Cav2.3 / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
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: 7.4 |
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 / 湿度: 100 % / 凍結前の試料温度: 281 K |
-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: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2100 nm / 最小 デフォーカス(公称値): 1900 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.20.1_4487: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 68109 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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