+
Open data
-
Basic information
Entry | ![]() | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Structure of an orphan GPCR-G protein signaling complex | |||||||||
![]() | Structure of an orphan GPCR-G protein signaling complex | |||||||||
![]() |
| |||||||||
Function / homology | ![]() motor learning / G protein-coupled photoreceptor activity / cellular response to light stimulus / plasma membrane => GO:0005886 / cytoskeletal motor activity / phototransduction / neuromuscular process controlling balance / neuronal action potential / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex ...motor learning / G protein-coupled photoreceptor activity / cellular response to light stimulus / plasma membrane => GO:0005886 / cytoskeletal motor activity / phototransduction / neuromuscular process controlling balance / neuronal action potential / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / regulation of mitotic spindle organization / cellular response to forskolin / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / locomotory behavior / Regulation of insulin secretion / G protein-coupled receptor binding / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / 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 / cilium / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / response to peptide hormone / 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 / GDP binding / 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 / cell cortex / midbody / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / cell division / lysosomal membrane / GTPase activity / centrosome / synapse / protein-containing complex binding / nucleolus / GTP binding / magnesium ion binding / signal transduction / extracellular exosome / nucleoplasm / membrane / nucleus / plasma membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.0 Å | |||||||||
![]() | Xu J / Chen G / Liu Z / Du Y | |||||||||
Funding support | 1 items
| |||||||||
![]() | ![]() Title: Activation and allosteric regulation of the orphan GPR88-Gi1 signaling complex. Authors: Geng Chen / Jun Xu / Asuka Inoue / Maximilian F Schmidt / Chen Bai / Qiuyuan Lu / Peter Gmeiner / Zheng Liu / Yang Du / ![]() ![]() ![]() ![]() Abstract: GPR88 is an orphan class A G-protein-coupled receptor that is highly expressed in the striatum and regulates diverse brain and behavioral functions. Here we present cryo-EM structures of the human ...GPR88 is an orphan class A G-protein-coupled receptor that is highly expressed in the striatum and regulates diverse brain and behavioral functions. Here we present cryo-EM structures of the human GPR88-Gi1 signaling complex with or without a synthetic agonist (1R, 2R)-2-PCCA. We show that (1R, 2R)-2-PCCA is an allosteric modulator binding to a herein identified pocket formed by the cytoplasmic ends of transmembrane segments 5, 6, and the extreme C terminus of the α5 helix of Gi1. We also identify an electron density in the extracellular orthosteric site that may represent a putative endogenous ligand of GPR88. These structures, together with mutagenesis studies and an inactive state model obtained from metadynamics simulations, reveal a unique activation mechanism for GPR88 with a set of distinctive structure features and a water-mediated polar network. Overall, our results provide a structural framework for understanding the ligand binding, activation and signaling mechanism of GPR88, and will facilitate the innovative drug discovery for neuropsychiatric disorders and for deorphanization of this receptor. | |||||||||
History |
|
-
Structure visualization
Supplemental images |
---|
-
Downloads & links
-EMDB archive
Map data | ![]() | 117.9 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 16.7 KB 16.7 KB | Display Display | ![]() |
Images | ![]() | 104.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7wz4MC ![]() 7ejxC M: atomic model generated by this map C: citing same article ( |
---|---|
Similar structure data | Similarity search - Function & homology ![]() |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Structure of an orphan GPCR-G protein signaling complex | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.85 Å | ||||||||||||||||||||
Density |
| ||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
|
-Supplemental data
-
Sample components
-Entire : GPR88-Gi1 signaling complex
Entire | Name: GPR88-Gi1 signaling complex |
---|---|
Components |
|
-Supramolecule #1: GPR88-Gi1 signaling complex
Supramolecule | Name: GPR88-Gi1 signaling complex / type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: all |
---|
-Supramolecule #2: GPR88-Gi1
Supramolecule | Name: GPR88-Gi1 / type: complex / Chimera: Yes / ID: 2 / Parent: 1 / Macromolecule list: #1-#4 |
---|---|
Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
-Supramolecule #3: scFv16
Supramolecule | Name: scFv16 / type: complex / Chimera: Yes / ID: 3 / Parent: 1 / Macromolecule list: #5 |
---|---|
Source (natural) | Organism: ![]() ![]() |
Recombinant expression | Organism: ![]() |
-Macromolecule #1: Probable G-protein coupled receptor 88
Macromolecule | Name: Probable G-protein coupled receptor 88 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 55.697926 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: DYKDDDDKLE VLFQGPGSAD LEDNWETLND NLKVIEKADN AAQVKDALTK MRAAALDAQK ATPPKLEDKS PDSPEMKDFR HGFDILVGQ IDDALKLANE GKVKEAQAAA EQLKTTRNAY IQKYLMTNSS STSTSSTTGG SLLLLCEEEE SWAGRRIPVS L LYSGLAIG ...String: DYKDDDDKLE VLFQGPGSAD LEDNWETLND NLKVIEKADN AAQVKDALTK MRAAALDAQK ATPPKLEDKS PDSPEMKDFR HGFDILVGQ IDDALKLANE GKVKEAQAAA EQLKTTRNAY IQKYLMTNSS STSTSSTTGG SLLLLCEEEE SWAGRRIPVS L LYSGLAIG GTLANGMVIY LVSSFRKLQT TSNAFIVNGC AADLSVCALW MPQEAVLGLL PTGSAEPPAD WDGAGGSYRL LR GGLLGLG LTVSLLSHCL VALNRYLLIT RAPATYQALY QRRHTAGMLA LSWALALGLV LLLPPWAPRP GAAPPRVHYP ALL AAAALL AQTALLLHCY LGIVRRVRVS VKRVSVLNFH LLHQLPGCAA AAAAFPGAQH APGPGGAAHP AQAQPLPPAL HPRR AQRRL SGLSVLLLCC VFLLATQPLV WVSLASGFSL PVPWGVQAAS WLLCCALSAL NPLLYTWRNE EFRRSVRSVL PGVGD AAAA AVAATAVPAV SQAQLGTRAA GQHWLEHHHH HHHHHH |
-Macromolecule #2: 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: 2 / Number of copies: 1 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 40.415031 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 FDVGGQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCA TDTKNVQFVF DAVTDVIIKN NLKDCGLF |
-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 |
---|---|
Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 39.286891 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: HHHHHHLEVL FQGPGSSGSE LDQLRQEAEQ LKNQIRDARK ACADATLSQI TNNIDPVGRI QMRTRRTLRG HLAKIYAMHW GTDSRLLVS ASQDGKLIIW DSYTTNKVHA IPLRSSWVMT CAYAPSGNYV ACGGLDNICS IYNLKTREGN VRVSRELAGH T GYLSCCRF ...String: HHHHHHLEVL FQGPGSSGSE LDQLRQEAEQ LKNQIRDARK ACADATLSQI TNNIDPVGRI QMRTRRTLRG HLAKIYAMHW GTDSRLLVS ASQDGKLIIW DSYTTNKVHA IPLRSSWVMT CAYAPSGNYV ACGGLDNICS IYNLKTREGN VRVSRELAGH T GYLSCCRF LDDNQIVTSS GDTTCALWDI ETGQQTTTFT GHTGDVMSLS LAPDTRLFVS GACDASAKLW DVREGMCRQT FT GHESDIN AICFFPNGNA FATGSDDATC RLFDLRADQE LMTYSHDNII CGITSVSFSK SGRLLLAGYD DFNCNVWDAL KAD RAGVLA GHDNRVSCLG VTDDGMAVAT GSWDSFLKIW N |
-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 |
---|---|
Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 7.861143 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L |
-Macromolecule #5: scFv16
Macromolecule | Name: scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 27.784896 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 KAAAHHHHHH HH |
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.5 |
---|---|
Sugar embedding | Material: vitreous ice |
Vitrification | Cryogen name: ETHANE |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 56.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Calibrated defocus max: 2.0 µm / Calibrated defocus min: 0.8 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.4000000000000001 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 105000 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
-
Image processing
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.0 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 314834 |
---|---|
Initial angle assignment | Type: RANDOM ASSIGNMENT |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |