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基本情報
登録情報 | データベース: PDB / ID: 8qmo | |||||||||||||||
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タイトル | Cryo-EM structure of the benzo[a]pyrene-bound Hsp90-XAP2-AHR complex | |||||||||||||||
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![]() | TRANSCRIPTION / detoxification / chemical pollutants / exposome | |||||||||||||||
機能・相同性 | ![]() GAF domain binding / cytosolic aryl hydrocarbon receptor complex / regulation of B cell proliferation / cellular response to 2,3,7,8-tetrachlorodibenzodioxine / HSP90-CDC37 chaperone complex / regulation of adaptive immune response / nuclear aryl hydrocarbon receptor complex / negative regulation of proteasomal protein catabolic process / cellular response to molecule of bacterial origin / Aryl hydrocarbon receptor signalling ...GAF domain binding / cytosolic aryl hydrocarbon receptor complex / regulation of B cell proliferation / cellular response to 2,3,7,8-tetrachlorodibenzodioxine / HSP90-CDC37 chaperone complex / regulation of adaptive immune response / nuclear aryl hydrocarbon receptor complex / negative regulation of proteasomal protein catabolic process / cellular response to molecule of bacterial origin / Aryl hydrocarbon receptor signalling / aryl hydrocarbon receptor complex / negative regulation of T cell mediated immune response to tumor cell / histone methyltransferase binding / dynein axonemal particle / receptor ligand inhibitor activity / Xenobiotics / positive regulation of protein localization to cell surface / ATP-dependent protein binding / Phase I - Functionalization of compounds / protein kinase regulator activity / protein folding chaperone complex / protein targeting to mitochondrion / Respiratory syncytial virus genome replication / blood vessel development / telomerase holoenzyme complex assembly / Uptake and function of diphtheria toxin / positive regulation of transforming growth factor beta receptor signaling pathway / E-box binding / dendritic growth cone / TPR domain binding / Assembly and release of respiratory syncytial virus (RSV) virions / aryl hydrocarbon receptor binding / TFIID-class transcription factor complex binding / The NLRP3 inflammasome / protein phosphatase activator activity / Sema3A PAK dependent Axon repulsion / regulation of protein ubiquitination / HSF1-dependent transactivation / response to unfolded protein / Endogenous sterols / HSF1 activation / telomere maintenance via telomerase / Attenuation phase / chaperone-mediated protein complex assembly / axonal growth cone / RHOBTB2 GTPase cycle / Purinergic signaling in leishmaniasis infection / cis-regulatory region sequence-specific DNA binding / supramolecular fiber organization / : / DNA polymerase binding / heat shock protein binding / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / peptide binding / protein folding chaperone / cellular response to forskolin / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / cellular response to interleukin-4 / xenobiotic metabolic process / ESR-mediated signaling / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / TBP-class protein binding / placenta development / protein maturation / cellular response to cAMP / nitric-oxide synthase regulator activity / DDX58/IFIH1-mediated induction of interferon-alpha/beta / positive regulation of cell differentiation / peptidyl-prolyl cis-trans isomerase activity / Hsp90 protein binding / ATP-dependent protein folding chaperone / circadian regulation of gene expression / PPARA activates gene expression / Chaperone Mediated Autophagy / Regulation of actin dynamics for phagocytic cup formation / response to toxic substance / negative regulation of inflammatory response / tau protein binding / kinase binding / transcription coactivator binding / histone deacetylase binding / The role of GTSE1 in G2/M progression after G2 checkpoint / nuclear receptor activity / positive regulation of nitric oxide biosynthetic process / sequence-specific double-stranded DNA binding / disordered domain specific binding / MHC class II protein complex binding / unfolded protein binding / melanosome / protein folding / double-stranded RNA binding / regulation of protein localization / regulation of gene expression / cellular response to heat / secretory granule lumen / transcription regulator complex / Estrogen-dependent gene expression / ficolin-1-rich granule lumen / Potential therapeutics for SARS / RNA polymerase II-specific DNA-binding transcription factor binding 類似検索 - 分子機能 | |||||||||||||||
生物種 | ![]() | |||||||||||||||
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: 2.76 Å | |||||||||||||||
![]() | Kwong, H.S. / Grandvuillemin, L. / Sirounian, S. / Ancelin, A. / Lai-Kee-Him, J. / Carivenc, C. / Lancey, C. / Ragan, T.J. / Hesketh, E.L. / Bourguet, W. / Gruszczyk, J. | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural Insights into the Activation of Human Aryl Hydrocarbon Receptor by the Environmental Contaminant Benzo[a]pyrene and Structurally Related Compounds. 著者: Hok-Sau Kwong / Matteo Paloni / Loïc Grandvuillemin / Savannah Sirounian / Aurélie Ancelin / Josephine Lai-Kee-Him / Marina Grimaldi / Coralie Carivenc / Claudia Lancey / Timothy J Ragan / ...著者: Hok-Sau Kwong / Matteo Paloni / Loïc Grandvuillemin / Savannah Sirounian / Aurélie Ancelin / Josephine Lai-Kee-Him / Marina Grimaldi / Coralie Carivenc / Claudia Lancey / Timothy J Ragan / Emma L Hesketh / Patrick Balaguer / Alessandro Barducci / Jakub Gruszczyk / William Bourguet / ![]() ![]() 要旨: The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor belonging to the bHLH/PAS protein family and responding to hundreds of natural and chemical substances. It is primarily ...The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor belonging to the bHLH/PAS protein family and responding to hundreds of natural and chemical substances. It is primarily involved in the defense against chemical insults and bacterial infections or in the adaptive immune response, but also in the development of pathological conditions ranging from inflammatory to neoplastic disorders. Despite its prominent roles in many (patho)physiological processes, the lack of high-resolution structural data has precluded for thirty years an in-depth understanding of the structural mechanisms underlying ligand-binding specificity, promiscuity and activation of AHR. We recently reported a cryogenic electron microscopy (cryo-EM) structure of human AHR bound to the natural ligand indirubin, the chaperone Hsp90 and the co-chaperone XAP2 that provided the first experimental visualization of its ligand-binding PAS-B domain. Here, we report a 2.75 Å resolution structure of the AHR complex bound to the environmental pollutant benzo[a]pyrene (B[a]P). The structure substantiates the existence of a bipartite PAS-B ligand-binding pocket with a geometrically constrained primary binding site controlling ligand binding specificity and affinity, and a secondary binding site contributing to the binding promiscuity of AHR. We also report a docking study of B[a]P congeners that validates the B[a]P-bound PAS-B structure as a suitable model for accurate computational ligand binding assessment. Finally, comparison of our agonist-bound complex with the recently reported structures of mouse and fruit fly AHR PAS-B in different activation states suggests a ligand-induced loop conformational change potentially involved in the regulation of AHR function. | |||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 646.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 533.3 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 60.6 KB | 表示 | |
CIF形式データ | ![]() | 90.6 KB | 表示 | |
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-関連構造データ
関連構造データ | ![]() 18498MC 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 ![]() |
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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
-タンパク質 , 3種, 4分子 ABCD
#1: タンパク質 | 分子量: 84213.141 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P08238 #2: タンパク質 | | 分子量: 37691.047 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O00170 #3: タンパク質 | | 分子量: 49492.559 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P35869 |
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-非ポリマー , 4種, 7分子 






#4: 化合物 | #5: 化合物 | #6: 化合物 | #7: 化合物 | ChemComp-W62 / | |
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-詳細
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 |
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試料調製
構成要素 | 名称: Benzo[a]pyrene-bound Hsp90-XAP2-AHR complex / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT | |||||||||||||||||||||||||||||||||||
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分子量 | 値: 0.254 MDa / 実験値: NO | |||||||||||||||||||||||||||||||||||
由来(天然) | 生物種: ![]() | |||||||||||||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | |||||||||||||||||||||||||||||||||||
緩衝液 | pH: 7 | |||||||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.18 mg/ml / 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: C-flat-1.2/1.3 | |||||||||||||||||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 298 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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 2300 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm / C2レンズ絞り径: 100 µm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 2 sec. / 電子線照射量: 1.1 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 撮影したグリッド数: 1 / 実像数: 9849 |
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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 ONLY | ||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 6327916 | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.76 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 630113 / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 7ZUB Accession code: 7ZUB / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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