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データを開く
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基本情報
登録情報 | ![]() | |||||||||||||||
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タイトル | Cryo-EM structure of a class T GPCR in ligand-free state | |||||||||||||||
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![]() | G protein-coupled receptor / taste type 2 receptors / cryo-electron microscopy structure / MEMBRANE PROTEIN | |||||||||||||||
機能・相同性 | ![]() bitter taste receptor activity / detection of chemical stimulus involved in sensory perception of bitter taste / Class C/3 (Metabotropic glutamate/pheromone receptors) / ciliary membrane / cellulase / cellulase activity / beta-glucosidase activity / cellulose catabolic process / G protein-coupled receptor activity / Olfactory Signaling Pathway ...bitter taste receptor activity / detection of chemical stimulus involved in sensory perception of bitter taste / Class C/3 (Metabotropic glutamate/pheromone receptors) / ciliary membrane / cellulase / cellulase activity / beta-glucosidase activity / cellulose catabolic process / 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 / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / retina development in camera-type eye / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / Ras protein signal transduction / G alpha (q) signalling events / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / cell surface / signal transduction / extracellular exosome / extracellular region / membrane / plasma membrane / cytoplasm / cytosol 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: 3.08 Å | |||||||||||||||
![]() | Liu ZJ / Hua T / Xu WX / Wu LJ | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis for strychnine activation of human bitter taste receptor TAS2R46. 著者: Weixiu Xu / Lijie Wu / Shenhui Liu / Xiao Liu / Xiaoling Cao / Cui Zhou / Jinyi Zhang / You Fu / Yu Guo / Yiran Wu / Qiwen Tan / Ling Wang / Junlin Liu / Longquan Jiang / Zhongbo Fan / Yuan ...著者: Weixiu Xu / Lijie Wu / Shenhui Liu / Xiao Liu / Xiaoling Cao / Cui Zhou / Jinyi Zhang / You Fu / Yu Guo / Yiran Wu / Qiwen Tan / Ling Wang / Junlin Liu / Longquan Jiang / Zhongbo Fan / Yuan Pei / Jingyi Yu / Jianjun Cheng / Suwen Zhao / Xiaojiang Hao / Zhi-Jie Liu / Tian Hua / ![]() 要旨: Taste sensing is a sophisticated chemosensory process, and bitter taste perception is mediated by type 2 taste receptors (TAS2Rs), or class T G protein-coupled receptors. Understanding the detailed ...Taste sensing is a sophisticated chemosensory process, and bitter taste perception is mediated by type 2 taste receptors (TAS2Rs), or class T G protein-coupled receptors. Understanding the detailed molecular mechanisms behind taste sensation is hindered by a lack of experimental receptor structures. Here, we report the cryo-electron microscopy structures of human TAS2R46 complexed with chimeric mini-G protein gustducin, in both strychnine-bound and apo forms. Several features of TAS2R46 are disclosed, including distinct receptor structures that compare with known GPCRs, a new "toggle switch," activation-related motifs, and precoupling with mini-G protein gustducin. Furthermore, the dynamic extracellular and more-static intracellular parts of TAS2R46 suggest possible diverse ligand-recognition and activation processes. This study provides a basis for further exploration of other bitter taste receptors and their therapeutic applications. | |||||||||||||||
履歴 |
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構造の表示
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 57 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 21.8 KB 21.8 KB | 表示 表示 | ![]() |
画像 | ![]() | 48.5 KB | ||
Filedesc metadata | ![]() | 7 KB | ||
その他 | ![]() ![]() | 59.3 MB 59.3 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 1.04 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
ファイル | emd_33365_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_33365_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : Complex of GPCR and G protein
全体 | 名称: Complex of GPCR and G protein |
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要素 |
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-超分子 #1: Complex of GPCR and G protein
超分子 | 名称: Complex of GPCR and G protein / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
-分子 #1: Endoglucanase H,Taste receptor type 2 member 46,Bitter taste rece...
分子 | 名称: Endoglucanase H,Taste receptor type 2 member 46,Bitter taste receptor T2R46 タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 91.116266 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MKTIIALSYI FCLVFADYKD DDDAHHHHHH HHHHENLYFQ SGRAMASNYN SGLKIGAWVG TQPSESAIKS FQELQGRKLD IVHQFINWS TDFSWVRPYA DAVYNNGSIL MITWEPWEYN TVDIKNGKAD AYITRMAQDM KAYGKEIWLR PLHAANGDWY P WAIGYSSR ...文字列: MKTIIALSYI FCLVFADYKD DDDAHHHHHH HHHHENLYFQ SGRAMASNYN SGLKIGAWVG TQPSESAIKS FQELQGRKLD IVHQFINWS TDFSWVRPYA DAVYNNGSIL MITWEPWEYN TVDIKNGKAD AYITRMAQDM KAYGKEIWLR PLHAANGDWY P WAIGYSSR VNTNETYIAA FRHIVDIFRA NGATNVKWVF NVNCDNVGNG TSYLGHYPGD NYVDYTSIDG YNWGTTQSWG SQ WQSFDQV FSRAYQALAS INKPIIIAEF ASAEIGGNKA RWITEAYNSI RTSYNKVIAA VWFHENKETD WRINSSPEAL AAY REAIGA ITFLPIIFSI LIVVTFVIGN FANGFIALVN SIEWFKRQKI SFADQILTAL AVSRVGLLWV LVLNWYATEL NPAF NSIEV RITAYNVWAV INHFSNWLAT SLSIFYLLKI ANFSNLIFLH LKRRVKSVVL VILLGPLLFL VCHLFVINMN QIIWT KEYE GNMTWKIKLR SAMYLSNTTV TILANLVPFT LTLISFLLLI CSLCKHLKKM QLHGKGSQDP SMKVHIKALQ TVTSFL LLC AIYFLSIIMS VWSFESLENK PVFMFCEAIA FSYPSTHPFI LIWGNKKLKQ TFLSVLWHVR YWVKGEKPSS SGSGSSG SG SSVFTLEDFV GDWEQTAAYN LDQVLEQGGV SSLLQNLAVS VTPIQRIVRS GENALKIDIH VIIPYEGLSA DQMAQIEE V FKVVYPVDDH HFKVILPYGT LVIDGVTPNM LNYFGRPYEG IAVFDGKKIT VTGTLWNGNK IIDERLITPD GSMLFRVTI NS UniProtKB: cellulase, Taste receptor type 2 member 46 |
-分子 #2: Guanine nucleotide-binding protein G(t) subunit alpha-3
分子 | 名称: Guanine nucleotide-binding protein G(t) subunit alpha-3 タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 30.583334 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MDYKDDDDKE NLYFQSNSKT EDQRNEEKAQ REANKKIEKQ LQKDKQVYRA THRLLLLGAD NSGKSTIVKQ MRILHGGSGG SGGTSGIFE TKFQVDKVNF HMFDVGGQRD ERRKWIQCFN DVTAIIFVVD SSDYNRLQEA LNDFKSIWNN RWLRTISVIL F LNKQDLLA ...文字列: MDYKDDDDKE NLYFQSNSKT EDQRNEEKAQ REANKKIEKQ LQKDKQVYRA THRLLLLGAD NSGKSTIVKQ MRILHGGSGG SGGTSGIFE TKFQVDKVNF HMFDVGGQRD ERRKWIQCFN DVTAIIFVVD SSDYNRLQEA LNDFKSIWNN RWLRTISVIL F LNKQDLLA EKVLAGKSKI EDYFPEFARY TTPEDATPEP GEDPRVTRAK YFIRDEFLRI STASGDGRHY CYPHFTCAVD TQ NVKFVFD AVTDIIIKEN LKDCGLF |
-分子 #3: 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: 3 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 39.728426 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL ...文字列: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD INAICFFPNG NA FATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAGHDNRVSC LGV TDDGMA VATGSWDSFL KIWNGSSGGG GSGGGGSSGV SGWRLFKKIS UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-分子 #4: 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: 4 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 7.861143 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-分子 #5: Nanobody 35
分子 | 名称: Nanobody 35 / タイプ: protein_or_peptide / ID: 5 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 15.271938 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MQVQLQESGG GLVQPGGSLR LSCAASGFTF SNYKMNWVRQ APGKGLEWVS DISQSGASIS YTGSVKGRFT ISRDNAKNTL YLQMNSLKP EDTAVYYCAR CPAPFTRDCF DVTSTTYAYR GQGTQVTVSS HHHHHHEPEA |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.5 |
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グリッド | モデル: Quantifoil R1.2/1.3 / 材質: GOLD / メッシュ: 400 |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK II |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 60.0 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): 2.2 µm / 最小 デフォーカス(公称値): 1.2 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
-原子モデル構築 1
精密化 | プロトコル: RIGID BODY FIT |
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得られたモデル | ![]() PDB-7xp5: |