+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-6369 | |||||||||
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タイトル | Structure of full-length IP3R1 channel in the apo-state determined by single particle cryo-EM | |||||||||
マップデータ | Reconstruction of IP3R1/Calcium release channel from the rat cerebellum | |||||||||
試料 |
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キーワード | inositol 1 / 4 / 5-trisphosphate receptor / calcium release channel / single-particle cryo-EM / calcium signaling / 3D reconstruction | |||||||||
機能・相同性 | 機能・相同性情報 Effects of PIP2 hydrolysis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / inositol 1,4,5-trisphosphate receptor activity involved in regulation of postsynaptic cytosolic calcium levels / release of sequestered calcium ion into cytosol by endoplasmic reticulum / cGMP effects / smooth endoplasmic reticulum membrane / Elevation of cytosolic Ca2+ levels / platelet dense tubular network / calcineurin complex / platelet dense granule membrane ...Effects of PIP2 hydrolysis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / inositol 1,4,5-trisphosphate receptor activity involved in regulation of postsynaptic cytosolic calcium levels / release of sequestered calcium ion into cytosol by endoplasmic reticulum / cGMP effects / smooth endoplasmic reticulum membrane / Elevation of cytosolic Ca2+ levels / platelet dense tubular network / calcineurin complex / platelet dense granule membrane / epithelial fluid transport / ion channel modulating, G protein-coupled receptor signaling pathway / phospholipase C-activating G protein-coupled acetylcholine receptor signaling pathway / inositol 1,4,5-trisphosphate-gated calcium channel activity / calcium import into the mitochondrion / voluntary musculoskeletal movement / inositol 1,4,5 trisphosphate binding / endoplasmic reticulum calcium ion homeostasis / positive regulation of calcium ion transport / negative regulation of calcium-mediated signaling / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / positive regulation of hepatocyte proliferation / nuclear inner membrane / Ion homeostasis / transport vesicle membrane / dendrite development / ligand-gated ion channel signaling pathway / intracellularly gated calcium channel activity / intrinsic apoptotic signaling pathway in response to endoplasmic reticulum stress / single fertilization / calcium channel inhibitor activity / GABA-ergic synapse / cellular response to cAMP / release of sequestered calcium ion into cytosol / regulation of cytosolic calcium ion concentration / post-embryonic development / phosphatidylinositol binding / secretory granule membrane / sarcoplasmic reticulum / synaptic membrane / liver regeneration / cell morphogenesis / positive regulation of insulin secretion / Schaffer collateral - CA1 synapse / positive regulation of neuron projection development / calcium ion transport / nuclear envelope / presynapse / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cytosolic calcium ion concentration / cellular response to hypoxia / protein phosphatase binding / protein homotetramerization / postsynapse / transmembrane transporter binding / postsynaptic density / response to hypoxia / positive regulation of apoptotic process / protein domain specific binding / neuronal cell body / dendrite / calcium ion binding / synapse / endoplasmic reticulum membrane / protein-containing complex binding / negative regulation of apoptotic process / nucleolus / perinuclear region of cytoplasm / endoplasmic reticulum / protein-containing complex / ATP binding / identical protein binding / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | Rattus norvegicus (ドブネズミ) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 4.7 Å | |||||||||
データ登録者 | Fan G / Baker ML / Wang Z / Baker MR / Sinyagovskiy PA / Chiu W / Ludtke SJ / Serysheva II | |||||||||
引用 | ジャーナル: Nature / 年: 2015 タイトル: Gating machinery of InsP3R channels revealed by electron cryomicroscopy. 著者: Guizhen Fan / Matthew L Baker / Zhao Wang / Mariah R Baker / Pavel A Sinyagovskiy / Wah Chiu / Steven J Ludtke / Irina I Serysheva / 要旨: Inositol-1,4,5-trisphosphate receptors (InsP3Rs) are ubiquitous ion channels responsible for cytosolic Ca(2+) signalling and essential for a broad array of cellular processes ranging from contraction ...Inositol-1,4,5-trisphosphate receptors (InsP3Rs) are ubiquitous ion channels responsible for cytosolic Ca(2+) signalling and essential for a broad array of cellular processes ranging from contraction to secretion, and from proliferation to cell death. Despite decades of research on InsP3Rs, a mechanistic understanding of their structure-function relationship is lacking. Here we present the first, to our knowledge, near-atomic (4.7 Å) resolution electron cryomicroscopy structure of the tetrameric mammalian type 1 InsP3R channel in its apo-state. At this resolution, we are able to trace unambiguously ∼85% of the protein backbone, allowing us to identify the structural elements involved in gating and modulation of this 1.3-megadalton channel. Although the central Ca(2+)-conduction pathway is similar to other ion channels, including the closely related ryanodine receptor, the cytosolic carboxy termini are uniquely arranged in a left-handed α-helical bundle, directly interacting with the amino-terminal domains of adjacent subunits. This configuration suggests a molecular mechanism for allosteric regulation of channel gating by intracellular signals. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_6369.map.gz | 23.1 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-6369-v30.xml emd-6369.xml | 11.3 KB 11.3 KB | 表示 表示 | EMDBヘッダ |
画像 | 400_6369.gif 80_6369.gif | 97.5 KB 5.8 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-6369 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-6369 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_6369_validation.pdf.gz | 310.4 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_6369_full_validation.pdf.gz | 309.9 KB | 表示 | |
XML形式データ | emd_6369_validation.xml.gz | 6.3 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6369 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6369 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_6369.map.gz / 形式: CCP4 / 大きさ: 62.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Reconstruction of IP3R1/Calcium release channel from the rat cerebellum | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.62 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Inositol 1,4,5-trisphosphate receptor, type 1
全体 | 名称: Inositol 1,4,5-trisphosphate receptor, type 1 |
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要素 |
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-超分子 #1000: Inositol 1,4,5-trisphosphate receptor, type 1
超分子 | 名称: Inositol 1,4,5-trisphosphate receptor, type 1 / タイプ: sample / ID: 1000 詳細: The sample was purified from rat cerebellum after solubilization with detergent; only freshly purified protein was used for cryo-EM visualization. 集合状態: tetramer / Number unique components: 1 |
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分子量 | 理論値: 1.3 MDa |
-分子 #1: Inositol 1,4,5-trisphosphate receptor
分子 | 名称: Inositol 1,4,5-trisphosphate receptor / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Calcium release channel / 詳細: detergent-solubilized protein / コピー数: 4 / 集合状態: tetramer / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: Rattus norvegicus (ドブネズミ) / 別称: Rat / 組織: cerebellum / 細胞中の位置: endoplasmic reticulum membrane |
分子量 | 実験値: 300 KDa / 理論値: 330 KDa |
配列 | UniProtKB: Inositol 1,4,5-trisphosphate-gated calcium channel ITPR1 |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.4 mg/mL |
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緩衝液 | pH: 7.4 詳細: 50 mM Tris-HCl, pH 7.4, 0.4% CHAPS, 150 mM NaCl, 1 mM DTT, 1 mM EGTA, 1 mM EDTA |
グリッド | 詳細: 400 mesh copper grids with thin carbon support |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 120 K / 装置: FEI VITROBOT MARK IV / 手法: blot once for 3 seconds |
-電子顕微鏡法
顕微鏡 | FEI POLARA 300 |
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温度 | 最低: 95 K / 最高: 102 K / 平均: 100 K |
アライメント法 | Legacy - 非点収差: Objective lens astigmatism was corrected at 100,000 times magnification. |
特殊光学系 | エネルギーフィルター - 名称: FEI |
日付 | 2014年1月1日 |
撮影 | カテゴリ: CCD / フィルム・検出器のモデル: GATAN K2 (4k x 4k) / デジタル化 - サンプリング間隔: 0.81 µm / 実像数: 4160 / 平均電子線量: 22 e/Å2 詳細: Every image is the sum of 30 frames recorded with a direct electron detector. |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 倍率(補正後): 30886 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 3.5 µm / 最小 デフォーカス(公称値): 0.6 µm / 倍率(公称値): 23000 |
試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
実験機器 | モデル: Tecnai Polara / 画像提供: FEI Company |
-画像解析
詳細 | Particle selection: EMAN2.1, CTF correction: CTFFIND3, initial model: EMAN2.1, refinement: RELION 1.3 |
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CTF補正 | 詳細: CTFFIND3 |
最終 再構成 | アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 4.7 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: RELION_1.3, EMAN_2.1 / 詳細: The final map was generated from 96,106 particles. / 使用した粒子像数: 96106 |