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Open data
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Basic information
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| Title | Cryo-EM structure of HCA2-Gi complex with acifran | |||||||||
Map data | map | |||||||||
Sample |
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Keywords | GPCR / SIGNALING PROTEIN | |||||||||
| Function / homology | Function and homology informationActivation of the phototransduction cascade / Olfactory Signaling Pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Prostacyclin signalling through prostacyclin receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G alpha (z) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through PI3Kgamma ...Activation of the phototransduction cascade / Olfactory Signaling Pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Prostacyclin signalling through prostacyclin receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G alpha (z) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / G beta:gamma signalling through BTK / Thromboxane signalling through TP receptor / Thrombin signalling through proteinase activated receptors (PARs) / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / G alpha (s) signalling events / Ca2+ pathway / nicotinic acid receptor activity / neutrophil apoptotic process / G alpha (12/13) signalling events / Extra-nuclear estrogen signaling / Hydroxycarboxylic acid-binding receptors / G alpha (q) signalling events / positive regulation of neutrophil apoptotic process / Vasopressin regulates renal water homeostasis via Aquaporins / GPER1 signaling / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (i) signalling events / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / ADP signalling through P2Y purinoceptor 1 / Class A/1 (Rhodopsin-like receptors) / positive regulation of adiponectin secretion / spectrin binding / alkylglycerophosphoethanolamine phosphodiesterase activity / phototransduction, visible light / photoreceptor outer segment / negative regulation of lipid catabolic process / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / Adenylate cyclase inhibitory pathway / T cell migration / D2 dopamine receptor binding / response to prostaglandin E / adenylate cyclase regulator activity / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cardiac muscle cell apoptotic process / cellular response to forskolin / regulation of mitotic spindle organization / Regulation of insulin secretion / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / electron transport chain / G protein-coupled receptor binding / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / centriolar satellite / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / GDP binding / G alpha (z) signalling events / ADORA2B mediated anti-inflammatory cytokines production / cell junction / GPER1 signaling / G-protein beta-subunit binding / heterotrimeric G-protein complex / sensory perception of taste / myelin sheath / retina development in camera-type eye / G protein activity / GTPase binding / fibroblast proliferation / midbody / cell cortex / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / cellular response to hypoxia / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / periplasmic space / electron transfer activity / Extra-nuclear estrogen signaling / cell population proliferation / ciliary basal body / G protein-coupled receptor signaling pathway / iron ion binding / lysosomal membrane / cell division / GTPase activity / heme binding / synapse / centrosome / GTP binding Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) / synthetic construct (others) / ![]() | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.11 Å | |||||||||
Authors | Suzuki S / Nishikawa K / Suzuki H / Fujiyoshi Y | |||||||||
| Funding support | Japan, 1 items
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Citation | Journal: Nat Commun / Year: 2023Title: Structural basis of hydroxycarboxylic acid receptor signaling mechanisms through ligand binding. Authors: Shota Suzuki / Kotaro Tanaka / Kouki Nishikawa / Hiroshi Suzuki / Atsunori Oshima / Yoshinori Fujiyoshi / ![]() Abstract: Hydroxycarboxylic acid receptors (HCA) are expressed in various tissues and immune cells. HCA2 and its agonist are thus important targets for treating inflammatory and metabolic disorders. Only ...Hydroxycarboxylic acid receptors (HCA) are expressed in various tissues and immune cells. HCA2 and its agonist are thus important targets for treating inflammatory and metabolic disorders. Only limited information is available, however, on the active-state binding of HCAs with agonists. Here, we present cryo-EM structures of human HCA2-Gi and HCA3-Gi signaling complexes binding with multiple compounds bound. Agonists were revealed to form a salt bridge with arginine, which is conserved in the HCA family, to activate these receptors. Extracellular regions of the receptors form a lid-like structure that covers the ligand-binding pocket. Although transmembrane (TM) 6 in HCAs undergoes dynamic conformational changes, ligands do not directly interact with amino acids in TM6, suggesting that indirect signaling induces a slight shift in TM6 to activate Gi proteins. Structural analyses of agonist-bound HCA2 and HCA3 together with mutagenesis and molecular dynamics simulation provide molecular insights into HCA ligand recognition and activation mechanisms. | |||||||||
| History |
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Structure visualization
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_35445.map.gz | 19.3 MB | EMDB map data format | |
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| Header (meta data) | emd-35445-v30.xml emd-35445.xml | 23.5 KB 23.5 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_35445_fsc.xml | 10.8 KB | Display | FSC data file |
| Images | emd_35445.png | 42.1 KB | ||
| Masks | emd_35445_msk_1.map | 20.8 MB | Mask map | |
| Filedesc metadata | emd-35445.cif.gz | 7.8 KB | ||
| Others | emd_35445_half_map_1.map.gz emd_35445_half_map_2.map.gz | 19.3 MB 19.3 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-35445 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-35445 | HTTPS FTP |
-Validation report
| Summary document | emd_35445_validation.pdf.gz | 940.6 KB | Display | EMDB validaton report |
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| Full document | emd_35445_full_validation.pdf.gz | 940.2 KB | Display | |
| Data in XML | emd_35445_validation.xml.gz | 14.9 KB | Display | |
| Data in CIF | emd_35445_validation.cif.gz | 19.5 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-35445 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-35445 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8ihiMC ![]() 8ihbC ![]() 8ihfC ![]() 8ihhC ![]() 8ihjC ![]() 8ihkC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_35445.map.gz / Format: CCP4 / Size: 20.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | map | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.99 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Mask #1
| File | emd_35445_msk_1.map | ||||||||||||
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| Density Histograms |
-Half map: half map A
| File | emd_35445_half_map_1.map | ||||||||||||
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| Annotation | half map A | ||||||||||||
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| Density Histograms |
-Half map: half map B
| File | emd_35445_half_map_2.map | ||||||||||||
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| Annotation | half map B | ||||||||||||
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| Density Histograms |
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Sample components
-Entire : Multiprotein complex
| Entire | Name: Multiprotein complex |
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| Components |
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-Supramolecule #1: Multiprotein complex
| Supramolecule | Name: Multiprotein complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #5, #1, #3-#4, #2 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-1
| Macromolecule | Name: Guanine nucleotide-binding protein G(i) subunit alpha-1 type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 40.446047 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGAQRSER KKWIHCFEGV AAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY QEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCS TDTKNVQFVF DAVTDVIIKN NLKDCGLF UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1 |
-Macromolecule #2: scFv16
| Macromolecule | Name: scFv16 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: synthetic construct (others) |
| Molecular weight | Theoretical: 26.466486 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL K |
-Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
| Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 41.772562 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MHHHHHHHHE NLYFQGSSEL DQLRQEAEQL KNQIRDARKA CADATLSQIT NNIDPVGRIQ MRTRRTLRGH LAKIYAMHWG TDSRLLVSA SQDGKLIIWD SYTTNKVHAI PLRSSWVMTC AYAPSGNYVA CGGLDNICSI YNLKTREGNV RVSRELAGHT G YLSCCRFL ...String: MHHHHHHHHE NLYFQGSSEL DQLRQEAEQL KNQIRDARKA CADATLSQIT NNIDPVGRIQ MRTRRTLRGH LAKIYAMHWG TDSRLLVSA SQDGKLIIWD SYTTNKVHAI PLRSSWVMTC AYAPSGNYVA CGGLDNICSI YNLKTREGNV RVSRELAGHT G YLSCCRFL DDNQIVTSSG DTTCALWDIE TGQQTTTFTG HTGDVMSLSL APDTRLFVSG ACDASAKLWD VREGMCRQTF TG HESDINA ICFFPNGNAF ATGSDDATCR LFDLRADQEL MTYSHDNIIC GITSVSFSKS GRLLLAGYDD FNCNVWDALK ADR AGVLAG HDNRVSCLGV TDDGMAVATG SWDSFLKIWN GGSGGGGSGG SSSGGVSGWR LFKKIS UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
| Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 7.729947 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: ASNNTASIAQ ARKLVEQLKM EANIDRIKVS KAAADLMAYC EAHAKEDPLL TPVPASENPF REKKFFCAIL UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-Macromolecule #5: Soluble cytochrome b562,Hydroxycarboxylic acid receptor 2
| Macromolecule | Name: Soluble cytochrome b562,Hydroxycarboxylic acid receptor 2 type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 74.879688 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MKTIIALSYI FCLVFADYKD DDDKADLEDN WETLNDNLKV IEKADNAAQV KDALTKMRAA ALDAQKATPP KLEDKSPDSP EMKDFRHGF DILVGQIDDA LKLANEGKVK EAQAAAEQLK TTRNAYIQKY LNRHHLQDHF LEIDKKNCCV FRDDFIVKVL P PVLGLEFI ...String: MKTIIALSYI FCLVFADYKD DDDKADLEDN WETLNDNLKV IEKADNAAQV KDALTKMRAA ALDAQKATPP KLEDKSPDSP EMKDFRHGF DILVGQIDDA LKLANEGKVK EAQAAAEQLK TTRNAYIQKY LNRHHLQDHF LEIDKKNCCV FRDDFIVKVL P PVLGLEFI FGLLGNGLAL WIFCFHLKSW KSSRIFLFNL AVADFLLIIC LPFLMDNYVR RWDWKFGDIP CRLMLFMLAM NR QGSIIFL TVVAVDRYFR VVHPHHALNK ISNRTAAIIS CLLWGITIGL TVHLLKKKMP IQNGGANLCS SFSICHTFQW HEA MFLLEF FLPLGIILFC SARIIWSLRQ RQMDRHAKIK RAITFIMVVA IVFVICFLPS VVVRIRIFWL LHTSGTQNCE VYRS VDLAF FITLSFTYMN SMLDPVVYYF SSPSFPNFFS TLINRCLQRK MTGEPDNNRS TSVELTGDPN KTRGAPEALM ANSGE PWSP SYLGPTSPEN LYFQGSVFTL EDFVGDWEQT AAYNLDQVLE QGGVSSLLQN LAVSVTPIQR IVRSGENALK IDIHVI IPY EGLSADQMAQ IEEVFKVVYP VDDHHFKVIL PYGTLVIDGV TPNMLNYFGR PYEGIAVFDG KKITVTGTLW NGNKIID ER LITPDGSMLF RVTINS UniProtKB: Soluble cytochrome b562, Hydroxycarboxylic acid receptor 2 |
-Macromolecule #6: 2-acetamido-2-deoxy-beta-D-glucopyranose
| Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 6 / Number of copies: 1 / Formula: NAG |
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| Molecular weight | Theoretical: 221.208 Da |
| Chemical component information | ![]() ChemComp-NAG: |
-Macromolecule #7: (5~{S})-5-methyl-4-oxidanylidene-5-phenyl-furan-2-carboxylic acid
| Macromolecule | Name: (5~{S})-5-methyl-4-oxidanylidene-5-phenyl-furan-2-carboxylic acid type: ligand / ID: 7 / Number of copies: 1 / Formula: P9X |
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| Molecular weight | Theoretical: 218.205 Da |
| Chemical component information | ![]() ChemComp-P9X: |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 15 mg/mL |
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| Buffer | pH: 7.4 |
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV |
| Details | This sample was monodisperse |
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Electron microscopy
| Microscope | JEOL CRYO ARM 300 |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 49.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm |
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Keywords
Homo sapiens (human)
Authors
Japan, 1 items
Citation



































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Processing
FIELD EMISSION GUN
