+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6vu5 | ||||||
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タイトル | Structure of G-alpha-q bound to its chaperone Ric-8A | ||||||
要素 |
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キーワード | CHAPERONE / G protein alpha subunit / Ric-8 / molecular chaperone / G alpha folding / guanine nucleotide exchange factor (GEF) / cryoEM structure / protein complex / G protein-coupled receptor (GPCR) / phosphorylation / quality control. | ||||||
機能・相同性 | 機能・相同性情報 cell-cell adhesion involved in gastrulation / cell migration involved in gastrulation / Fatty Acids bound to GPR40 (FFAR1) regulate insulin secretion / Acetylcholine regulates insulin secretion / basement membrane organization / PLC beta mediated events / phospholipase C-activating dopamine receptor signaling pathway / entrainment of circadian clock / regulation of platelet activation / phototransduction, visible light ...cell-cell adhesion involved in gastrulation / cell migration involved in gastrulation / Fatty Acids bound to GPR40 (FFAR1) regulate insulin secretion / Acetylcholine regulates insulin secretion / basement membrane organization / PLC beta mediated events / phospholipase C-activating dopamine receptor signaling pathway / entrainment of circadian clock / regulation of platelet activation / phototransduction, visible light / vasculature development / regulation of canonical Wnt signaling pathway / glutamate receptor signaling pathway / action potential / response to light stimulus / photoreceptor outer segment / G-protein alpha-subunit binding / gastrulation / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / GTPase activator activity / guanyl-nucleotide exchange factor activity / G protein-coupled receptor binding / negative regulation of protein kinase activity / visual learning / G-protein beta/gamma-subunit complex binding / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / ADP signalling through P2Y purinoceptor 1 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / blood coagulation / heterotrimeric G-protein complex / Thrombin signalling through proteinase activated receptors (PARs) / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 / G alpha (q) signalling events / nuclear membrane / in utero embryonic development / protein stabilization / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / GTP binding / Golgi apparatus / extracellular exosome / membrane / metal ion binding / plasma membrane / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | Rattus norvegicus (ドブネズミ) 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: 3.5 Å | ||||||
データ登録者 | Seven, A.B. / Hilger, D. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Cell Rep / 年: 2020 タイトル: Structures of Gα Proteins in Complex with Their Chaperone Reveal Quality Control Mechanisms. 著者: Alpay Burak Seven / Daniel Hilger / Makaía M Papasergi-Scott / Li Zhang / Qianhui Qu / Brian K Kobilka / Gregory G Tall / Georgios Skiniotis / 要旨: Many chaperones promote nascent polypeptide folding followed by substrate release through ATP-dependent conformational changes. Here we show cryoEM structures of Gα subunit folding intermediates in ...Many chaperones promote nascent polypeptide folding followed by substrate release through ATP-dependent conformational changes. Here we show cryoEM structures of Gα subunit folding intermediates in complex with full-length Ric-8A, a unique chaperone-client system in which substrate release is facilitated by guanine nucleotide binding to the client G protein. The structures of Ric-8A-Gα and Ric-8A-Gα complexes reveal that the chaperone employs its extended C-terminal region to cradle the Ras-like domain of Gα, positioning the Ras core in contact with the Ric-8A core while engaging its switch2 nucleotide binding region. The C-terminal α5 helix of Gα is held away from the Ras-like domain through Ric-8A core domain interactions, which critically depend on recognition of the Gα C terminus by the chaperone. The structures, complemented with biochemical and cellular chaperoning data, support a folding quality control mechanism that ensures proper formation of the C-terminal α5 helix before allowing GTP-gated release of Gα from Ric-8A. | ||||||
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 | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6vu5.cif.gz | 116 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6vu5.ent.gz | 89.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6vu5.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 | 6vu5_validation.pdf.gz | 1015.1 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6vu5_full_validation.pdf.gz | 1019.5 KB | 表示 | |
XML形式データ | 6vu5_validation.xml.gz | 28.6 KB | 表示 | |
CIF形式データ | 6vu5_validation.cif.gz | 40.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/vu/6vu5 ftp://data.pdbj.org/pub/pdb/validation_reports/vu/6vu5 | 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: 53908.895 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q80ZG1*PLUS |
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#2: タンパク質 | 分子量: 42197.027 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: GNAQ, GAQ / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: P50148 |
研究の焦点であるリガンドがあるか | N |
配列の詳細 | The full sequence of Ric-8A is QGEFMEPRAVADALETGEEDAVTEALRSFNREHSQSFTFDDAQQEDRKRLAKLLVSVLE ...The full sequence of Ric-8A is QGEFMEPRAV |
-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: Complex of Ric-8A with G alpha q / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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由来(天然) | 生物種: Rattus norvegicus/Homo sapiens (ドブネズミ) |
由来(組換発現) | 生物種: Trichoplusia ni (イラクサキンウワバ) |
緩衝液 | pH: 7.5 |
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 |
-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): 2000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm |
撮影 | 電子線照射量: 1.3 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.17.1_3660: / 分類: 精密化 | ||||||||||||||||||||||||
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 70439 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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