+
データを開く
-
基本情報
登録情報 | ![]() | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | Cryo-EM structure of the proton-sensing GPCR (GPR4)-Gq protein complex at pH 7.4 | |||||||||
![]() | ||||||||||
![]() |
| |||||||||
![]() | Cryo-EM / GPCR / proton-sensing / GPR4 / pH 7.4 / Gq / complex / SIGNALING PROTEIN | |||||||||
機能・相同性 | ![]() glomerular mesangial cell development / regulation of vascular permeability / response to acidic pH / Class A/1 (Rhodopsin-like receptors) / angiogenesis involved in wound healing / positive regulation of Rho protein signal transduction / regulation of cell adhesion / negative regulation of angiogenesis / G protein-coupled receptor activity / Olfactory Signaling Pathway ...glomerular mesangial cell development / regulation of vascular permeability / response to acidic pH / Class A/1 (Rhodopsin-like receptors) / angiogenesis involved in wound healing / positive regulation of Rho protein signal transduction / regulation of cell adhesion / negative regulation of angiogenesis / G protein-coupled receptor activity / Olfactory Signaling Pathway / 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 / positive regulation of inflammatory response / 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 / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / 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 / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / GTPase binding / Ca2+ pathway / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.55 Å | |||||||||
![]() | Xu HE / You C / Jiang Y | |||||||||
資金援助 | ![]()
| |||||||||
![]() | ![]() タイトル: Molecular mechanism of pH sensing and activation in GPR4 reveals proton-mediated GPCR signaling. 著者: Chongzhao You / Shimeng Guo / Tianwei Zhang / Xinheng He / Tianyu Gao / Wenwen Xin / Zining Zhu / Yujie Lu / Youwei Xu / Zhen Li / Yumu Zhang / Xi Cheng / Yi Jiang / Xin Xie / H Eric Xu / ![]() 要旨: Maintaining pH homeostasis is critical for cellular function across all living organisms. Proton-sensing G protein-coupled receptors (GPCRs), particularly GPR4, play a pivotal role in cellular ...Maintaining pH homeostasis is critical for cellular function across all living organisms. Proton-sensing G protein-coupled receptors (GPCRs), particularly GPR4, play a pivotal role in cellular responses to pH changes. Yet, the molecular mechanisms underlying their proton sensing and activation remain incompletely understood. Here we present high-resolution cryo-electron microscopy structures of GPR4 in complex with G proteins under physiological and acidic pH conditions. Our structures reveal an intricate proton-sensing mechanism driven by a sophisticated histidine network in the receptor's extracellular domain. Upon protonation of key histidines under acidic conditions, a remarkable conformational cascade is initiated, propagating from the extracellular region to the intracellular G protein-coupling interface. This dynamic process involves precise transmembrane helix rearrangements and conformational shifts of conserved motifs, mediated by strategically positioned water molecules. Notably, we discovered a bound bioactive lipid, lysophosphatidylcholine, which has positive allosteric effects on GPR4 activation. These findings provide a comprehensive framework for understanding proton sensing in GPCRs and the interplay between pH sensing and lipid regulation, offering insights into cellular pH homeostasis and potential therapies for pH-related disorders. | |||||||||
履歴 |
|
-
構造の表示
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 | ![]() | 32.8 MB | ![]() | |
---|---|---|---|---|
ヘッダ (付随情報) | ![]() ![]() | 20.4 KB 20.4 KB | 表示 表示 | ![]() |
画像 | ![]() | 37.4 KB | ||
Filedesc metadata | ![]() | 6.9 KB | ||
その他 | ![]() ![]() | 59.4 MB 59.4 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 838.5 KB | 表示 | ![]() |
---|---|---|---|---|
文書・詳細版 | ![]() | 838.1 KB | 表示 | |
XML形式データ | ![]() | 12.5 KB | 表示 | |
CIF形式データ | ![]() | 14.7 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
-
リンク
EMDBのページ | ![]() ![]() |
---|---|
「今月の分子」の関連する項目 |
-
マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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: 0.73 Å | ||||||||||||||||||||||||||||||||||||
密度 |
| ||||||||||||||||||||||||||||||||||||
対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
|
-添付データ
-ハーフマップ: #2
ファイル | emd_61371_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
投影像・断面図 |
| ||||||||||||
密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_61371_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
投影像・断面図 |
| ||||||||||||
密度ヒストグラム |
-
試料の構成要素
-全体 : Cryo-EM structure of the proton-sensing GPCR (GPR4)-Gq protein co...
全体 | 名称: Cryo-EM structure of the proton-sensing GPCR (GPR4)-Gq protein complex at pH 7.4 |
---|---|
要素 |
|
-超分子 #1: Cryo-EM structure of the proton-sensing GPCR (GPR4)-Gq protein co...
超分子 | 名称: Cryo-EM structure of the proton-sensing GPCR (GPR4)-Gq protein complex at pH 7.4 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #5, #1-#4 |
---|---|
由来(天然) | 生物種: ![]() |
-分子 #1: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
分子 | 名称: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
---|---|
由来(天然) | 生物種: ![]() |
分子量 | 理論値: 56.515297 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...文字列: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWNG SSGGGGSGGG GSSGVFTLED FVGDWEQTAA YNLDQVLEQG GVSSLLQNLA VSVT PIQRI VRSGENALKI DIHVIIPYEG LSADQMAQIE EVFKVVYPVD DHHFKVILPY GTLVIDGVTP NMLNYFGRPY EGIAV FDGK KITVTGTLWN GNKIIDERLI TPDGSMLFRV TINS UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-分子 #2: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
分子 | 名称: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
---|---|
由来(天然) | 生物種: ![]() |
分子量 | 理論値: 7.729947 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: ASNNTASIAQ ARKLVEQLKM EANIDRIKVS KAAADLMAYC EAHAKEDPLL TPVPASENPF REKKFFCAIL UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-分子 #3: Nanobody 35
分子 | 名称: Nanobody 35 / タイプ: protein_or_peptide / ID: 3 / コピー数: 1 / 光学異性体: LEVO |
---|---|
由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 13.885439 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: QVQLQESGGG LVQPGGSLRL SCAASGFTFS NYKMNWVRQA PGKGLEWVSD ISQSGASISY TGSVKGRFTI SRDNAKNTLY LQMNSLKPE DTAVYYCARC PAPFTRDCFD VTSTTYAYRG QGTQVTVSS |
-分子 #4: G-protein coupled receptor 4
分子 | 名称: G-protein coupled receptor 4 / タイプ: protein_or_peptide / ID: 4 / コピー数: 1 / 光学異性体: LEVO |
---|---|
由来(天然) | 生物種: ![]() |
分子量 | 理論値: 41.026664 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MGNHTWEGCH VDSRVDHLFP PSLYIFVIGV GLPTNCLALW AAYRQVQQRN ELGVYLMNLS IADLLYICTL PLWVDYFLHH DNWIHGPGS CKLFGFIFYT NIYISIAFLC CISVDRYLAV AHPLRFARLR RVKTAVAVSS VVWATELGAN SAPLFHDELF R DRYNHTFC ...文字列: MGNHTWEGCH VDSRVDHLFP PSLYIFVIGV GLPTNCLALW AAYRQVQQRN ELGVYLMNLS IADLLYICTL PLWVDYFLHH DNWIHGPGS CKLFGFIFYT NIYISIAFLC CISVDRYLAV AHPLRFARLR RVKTAVAVSS VVWATELGAN SAPLFHDELF R DRYNHTFC FEKFPMEGWV AWMNLYRVFV GFLFPWALML LSYRGILRAV RGSVSTERQE KAKIKRLALS LIAIVLVCFA PY HVLLLSR SAIYLGRPWD CGFEERVFSA YHSSLAFTSL NCVADPILYC LVNEGARSDV AKALHNLLRF LASDKPQEMA NAS LTLETP LTSKRNSTAK AMTGSWAATP PSQGDQVQLK MLPPAQ UniProtKB: G-prodeshotein coupled receptor 4 |
-分子 #5: Guanine nucleotide-binding protein G(q) subunit alpha
分子 | 名称: Guanine nucleotide-binding protein G(q) subunit alpha タイプ: protein_or_peptide / ID: 5 / コピー数: 1 / 光学異性体: LEVO |
---|---|
由来(天然) | 生物種: ![]() |
分子量 | 理論値: 41.724383 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RRTLRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...文字列: MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RRTLRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTSGIFETK FQVDKVNFHM FDVGAQRDER RKWIQCFNDV TAIIFVVDSS DYNRLQEALN DF KSIWNNR WLRTISVILF LNKQDLLAEK VLAGKSKIED YFPEFARYTT PEDATPEPGE DPRVTRAKYF IRKEFVDIST ASG DGRHIC YPHFTCSVDT ENARRIFNDC KDIILQMNLR EYNLV |
-分子 #6: CHOLESTEROL
分子 | 名称: CHOLESTEROL / タイプ: ligand / ID: 6 / コピー数: 1 / 式: CLR |
---|---|
分子量 | 理論値: 386.654 Da |
Chemical component information | ![]() ChemComp-CLR: |
-分子 #7: 2-[[(2~{R})-3-acetyloxy-2-oxidanyl-propoxy]-oxidanyl-phosphoryl]o...
分子 | 名称: 2-[[(2~{R})-3-acetyloxy-2-oxidanyl-propoxy]-oxidanyl-phosphoryl]oxyethyl-trimethyl-azanium タイプ: ligand / ID: 7 / コピー数: 2 / 式: A1L35 |
---|---|
分子量 | 理論値: 300.266 Da |
-分子 #8: water
分子 | 名称: water / タイプ: ligand / ID: 8 / コピー数: 4 / 式: HOH |
---|---|
分子量 | 理論値: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
---|---|
![]() | 単粒子再構成法 |
試料の集合状態 | particle |
-
試料調製
緩衝液 | pH: 7.4 |
---|---|
凍結 | 凍結剤: ETHANE |
-
電子顕微鏡法
顕微鏡 | FEI TALOS ARCTICA |
---|---|
撮影 | フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 平均電子線量: 50.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 20.0 µm / 最小 デフォーカス(公称値): 5.0 µm |
実験機器 | ![]() モデル: Talos Arctica / 画像提供: FEI Company |