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基本情報
登録情報 | データベース: PDB / ID: 6m1h | ||||||
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タイトル | CryoEM structure of human PAC1 receptor in complex with maxadilan | ||||||
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![]() | PROTEIN BINDING / GPCR | ||||||
機能・相同性 | ![]() negative regulation of response to reactive oxygen species / development of primary female sexual characteristics / pituitary adenylate cyclase-activating polypeptide receptor activity / vasoactive intestinal polypeptide receptor activity / NGF-independant TRKA activation / neuropeptide binding / positive regulation of small GTPase mediated signal transduction / G protein-coupled peptide receptor activity / positive regulation of inositol phosphate biosynthetic process / positive regulation of calcium ion transport into cytosol ...negative regulation of response to reactive oxygen species / development of primary female sexual characteristics / pituitary adenylate cyclase-activating polypeptide receptor activity / vasoactive intestinal polypeptide receptor activity / NGF-independant TRKA activation / neuropeptide binding / positive regulation of small GTPase mediated signal transduction / G protein-coupled peptide receptor activity / positive regulation of inositol phosphate biosynthetic process / positive regulation of calcium ion transport into cytosol / positive regulation of cAMP/PKA signal transduction / peptide hormone binding / cAMP/PKA signal transduction / adenylate cyclase binding / PKA activation in glucagon signalling / developmental growth / hair follicle placode formation / bicellular tight junction / D1 dopamine receptor binding / multicellular organismal response to stress / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / activation of adenylate cyclase activity / renal water homeostasis / Hedgehog 'off' state / adenylate cyclase-activating adrenergic receptor signaling pathway / cellular response to glucagon stimulus / regulation of insulin secretion / adenylate cyclase activator activity / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / bone development / caveola / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / small GTPase binding / platelet aggregation / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / vasodilation / cognition / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADP signalling through P2Y purinoceptor 1 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / sensory perception of smell / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / response to estradiol / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor activity / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / positive regulation of cold-induced thermogenesis / retina development in camera-type eye / G protein activity / GTPase binding / Ca2+ pathway / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / response to ethanol / spermatogenesis / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / 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 / Ras protein signal transduction / cell differentiation / Extra-nuclear estrogen signaling / cell surface receptor signaling pathway / cell population proliferation 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: 3.6 Å | ||||||
![]() | Song, X. / Wang, J. / Zhang, D. / Wang, H.W. / Ma, Y. | ||||||
![]() | ![]() タイトル: Cryo-EM structures of PAC1 receptor reveal ligand binding mechanism. 著者: Jia Wang / Xianqiang Song / Dandan Zhang / Xiaoqing Chen / Xun Li / Yaping Sun / Cui Li / Yunpeng Song / Yao Ding / Ruobing Ren / Essa Hu Harrington / Liaoyuan A Hu / Wenge Zhong / Cen Xu / ...著者: Jia Wang / Xianqiang Song / Dandan Zhang / Xiaoqing Chen / Xun Li / Yaping Sun / Cui Li / Yunpeng Song / Yao Ding / Ruobing Ren / Essa Hu Harrington / Liaoyuan A Hu / Wenge Zhong / Cen Xu / Xin Huang / Hong-Wei Wang / Yingli Ma / ![]() ![]() 要旨: The pituitary adenylate cyclase-activating polypeptide type I receptor (PAC1R) belongs to the secretin receptor family and is widely distributed in the central neural system and peripheral organs. ...The pituitary adenylate cyclase-activating polypeptide type I receptor (PAC1R) belongs to the secretin receptor family and is widely distributed in the central neural system and peripheral organs. Abnormal activation of the receptor mediates trigeminovascular activation and sensitization, which is highly related to migraine, making PAC1R a potential therapeutic target. Elucidation of PAC1R activation mechanism would benefit discovery of therapeutic drugs for neuronal disorders. PAC1R activity is governed by pituitary adenylate cyclase-activating polypeptide (PACAP), known as a major vasodilator neuropeptide, and maxadilan, a native peptide from the sand fly, which is also capable of activating the receptor with similar potency. These peptide ligands have divergent sequences yet initiate convergent PAC1R activity. It is of interest to understand the mechanism of PAC1R ligand recognition and receptor activity regulation through structural biology. Here we report two near-atomic resolution cryo-EM structures of PAC1R activated by PACAP38 or maxadilan, providing structural insights into two distinct ligand binding modes. The structures illustrate flexibility of the extracellular domain (ECD) for ligands with distinct conformations, where ECD accommodates ligands in different orientations while extracellular loop 1 (ECL1) protrudes to further anchor the ligand bound in the orthosteric site. By structure-guided molecular modeling and mutagenesis, we tested residues in the ligand-binding pockets and identified clusters of residues that are critical for receptor activity. The structures reported here for the first time elucidate the mechanism of specificity and flexibility of ligand recognition and binding for PAC1R, and provide insights toward the design of therapeutic molecules targeting PAC1R. | ||||||
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 218 KB | 表示 | ![]() |
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PDB形式 | ![]() | 167.7 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 730.5 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 744.3 KB | 表示 | |
XML形式データ | ![]() | 35 KB | 表示 | |
CIF形式データ | ![]() | 54.3 KB | 表示 | |
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-関連構造データ
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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 , 2種, 2分子 AB
#1: タンパク質 | 分子量: 47967.223 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
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#2: タンパク質 | 分子量: 6881.820 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() |
-Guanine nucleotide-binding protein ... , 3種, 3分子 DEF
#4: タンパク質 | 分子量: 7861.143 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
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#5: タンパク質 | 分子量: 37473.980 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
#6: タンパク質 | 分子量: 45683.434 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
-抗体 , 1種, 1分子 C
#3: 抗体 | 分子量: 14714.320 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
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-詳細
Has protein modification | 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: PACAP38-PAC1R complex / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 値: 0.15 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: 7.5 |
試料 | 濃度: 5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % |
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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 / Cs: 0 mm / C2レンズ絞り径: 50 µm |
撮影 | 電子線照射量: 50 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
画像スキャン | 横: 3838 / 縦: 3710 |
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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 AND AMPLITUDE CORRECTION | ||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||
3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 58451 / アルゴリズム: BACK PROJECTION / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||
原子モデル構築 | PDB-ID: 5B16 Accession code: 5B16 / Source name: PDB / タイプ: experimental model |