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基本情報
登録情報 | データベース: PDB / ID: 9k3f | ||||||||||||||||||
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タイトル | Cryo-EM structure of the unliganded human melanocortin receptor 3 (MC3R)-Gs complex | ||||||||||||||||||
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![]() | MEMBRANE PROTEIN / human melanocortin receptor 3 / G protein-coupled receptor / unliganded / constitutive activity | ||||||||||||||||||
機能・相同性 | ![]() homoiothermy / melanocyte-stimulating hormone receptor activity / melanocortin receptor activity / sodium ion homeostasis / regulation of feeding behavior / neuropeptide binding / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor ...homoiothermy / melanocyte-stimulating hormone receptor activity / melanocortin receptor activity / sodium ion homeostasis / regulation of feeding behavior / neuropeptide binding / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / regulation of metabolic process / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / Thrombin signalling through proteinase activated receptors (PARs) / G alpha (z) signalling events / Extra-nuclear estrogen signaling / G alpha (s) signalling events / G alpha (q) signalling events / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / locomotor rhythm / peptide hormone binding / PKA activation in glucagon signalling / developmental growth / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / hair follicle placode formation / D1 dopamine receptor binding / intracellular transport / adenylate cyclase inhibitor activity / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / activation of adenylate cyclase activity / Hedgehog 'off' state / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / adenylate cyclase-activating adrenergic receptor signaling pathway / response to prostaglandin E / G protein-coupled serotonin receptor binding / adenylate cyclase regulator activity / adenylate cyclase-inhibiting serotonin receptor signaling pathway / Transcriptional and post-translational regulation of MITF-M expression and activity / cellular response to forskolin / cellular response to glucagon stimulus / regulation of insulin secretion / regulation of heart rate / regulation of mitotic spindle organization / Peptide ligand-binding receptors / adenylate cyclase activator activity / trans-Golgi network membrane / Regulation of insulin secretion / negative regulation of inflammatory response to antigenic stimulus / circadian regulation of gene expression / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor binding / negative regulation of insulin secretion / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / bone development / response to peptide hormone / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / regulation of blood pressure / centriolar satellite / G-protein beta/gamma-subunit complex binding / platelet aggregation / Olfactory Signaling Pathway / Activation of the phototransduction cascade / cognition / 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 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | ![]() synthetic construct (人工物) ![]() ![]() | ||||||||||||||||||
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: 2.75 Å | ||||||||||||||||||
![]() | Feng, W.B. / Zhou, Q.T. / Zheng, C. / Yang, D.H. / Wang, M.W. | ||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis for the constitutive activity of the melanocortin receptor family. 著者: Wenbo Feng / Qingtong Zhou / Chang Zheng / Dehua Yang / Ming-Wei Wang / ![]() 要旨: The constitutive activity of melanocortin receptors (MCRs) is integral to several physiological processes. The unliganded cryo-electron microscopy structures of MC1R, MC2R, MC3R, MC4R, and MC5R in ...The constitutive activity of melanocortin receptors (MCRs) is integral to several physiological processes. The unliganded cryo-electron microscopy structures of MC1R, MC2R, MC3R, MC4R, and MC5R in complex with G proteins determined at global resolutions of 2.98 Å, 3.01 Å, 2.75 Å, 3.12 Å, and 2.86 Å, respectively, revealed that their binding poses and interactions with G are similar to those of agonist-bound MCRs. The extracellular regions of the transmembrane helices (TMs) exhibit distinct conformational rearrangements, characterized by varying shifts of TM3 and outward displacements of TM4. These variations represent unique structural features of constitutively activated MCRs. Unassigned electron densities were observed within the orthosteric pockets where extensive interactions with cognate ligands occur. In addition, zinc ions, but not calcium, positively regulated MC4R activity in a dose-dependent manner. Our findings provide valuable insights into the molecular mechanisms underlying MCR basal activity and highlight the role of divalent ions in receptor activation. | ||||||||||||||||||
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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 | ![]() | 217.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 164.1 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 983.3 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1000.7 KB | 表示 | |
XML形式データ | ![]() | 44.3 KB | 表示 | |
CIF形式データ | ![]() | 68.9 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 62014MC ![]() 9k3hC ![]() 9k3kC ![]() 9k3lC ![]() 9k3pC 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
#1: タンパク質 | 分子量: 54666.828 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: MC3R 発現宿主: ![]() ![]() 参照: UniProt: P41968 |
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#2: タンパク質 | 分子量: 41879.465 Da / 分子数: 1 Mutation: G49D,E50N,L63Y,G226A,A249D,S252D,L272D,A366S,I372A,V375I 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P63096, UniProt: P63092, 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 |
#3: タンパク質 | 分子量: 40226.992 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: GNB1 発現宿主: ![]() ![]() 参照: UniProt: P62873 |
#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) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P63212 |
#5: 抗体 | 分子量: 30363.043 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) 発現宿主: ![]() ![]() |
Has protein modification | Y |
-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: Cryo-EM structure of unliganded human melanocortin receptor 3 in complex with Gs protein タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||
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由来(天然) |
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由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||
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 |
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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: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 80 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
EMソフトウェア | 名称: PHENIX / バージョン: 1.16 / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.75 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 148047 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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