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- PDB-6lmk: Cryo-EM structure of the human glucagon receptor in complex with Gs -

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Basic information

Entry
Database: PDB / ID: 6lmk
TitleCryo-EM structure of the human glucagon receptor in complex with Gs
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Glucagon receptor
  • Glucagon
  • Nb35
KeywordsSIGNALING PROTEIN / glucagon receptor / GPCR / Gs protein
Function / homology
Function and homology information


glucagon receptor binding / regulation of glycogen metabolic process / glucagon receptor activity / negative regulation of execution phase of apoptosis / feeding behavior / : / response to starvation / cellular response to glucagon stimulus / positive regulation of calcium ion import / exocytosis ...glucagon receptor binding / regulation of glycogen metabolic process / glucagon receptor activity / negative regulation of execution phase of apoptosis / feeding behavior / : / response to starvation / cellular response to glucagon stimulus / positive regulation of calcium ion import / exocytosis / positive regulation of insulin secretion involved in cellular response to glucose stimulus / PKA activation in glucagon signalling / peptide hormone binding / regulation of insulin secretion / hair follicle placode formation / intracellular transport / D1 dopamine receptor binding / developmental growth / Synthesis, secretion, and deacylation of Ghrelin / Hedgehog 'off' state / positive regulation of cAMP-mediated signaling / adenylate cyclase-activating adrenergic receptor signaling pathway / protein kinase A signaling / positive regulation of gluconeogenesis / activation of adenylate cyclase activity / adenylate cyclase activator activity / cellular response to starvation / hormone-mediated signaling pathway / guanyl-nucleotide exchange factor activity / response to nutrient / response to activity / trans-Golgi network membrane / positive regulation of peptidyl-threonine phosphorylation / generation of precursor metabolites and energy / gluconeogenesis / G-protein beta/gamma-subunit complex binding / 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 / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / bone development / G-protein activation / G protein-coupled acetylcholine receptor signaling pathway / 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 / adenylate cyclase-activating G protein-coupled receptor signaling pathway / hormone activity / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / platelet aggregation / cognition / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / positive regulation of GTPase activity / G alpha (z) signalling events / regulation of blood pressure / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / adenylate cyclase-activating dopamine receptor signaling pathway / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / sensory perception of taste / GPER1 signaling / G-protein beta-subunit binding / heterotrimeric G-protein complex / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / G alpha (12/13) signalling events / signaling receptor complex adaptor activity / sensory perception of smell / Thrombin signalling through proteinase activated receptors (PARs) / glucose homeostasis / retina development in camera-type eye / GTPase binding / positive regulation of peptidyl-serine phosphorylation / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cold-induced thermogenesis / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / secretory granule lumen / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / positive regulation of ERK1 and ERK2 cascade / cell surface receptor signaling pathway
Similarity search - Function
GPCR, family 2, glucagon receptor / Glucagon / Transducin (heterotrimeric G protein), gamma chain / G Protein Gi Gamma 2 / Glucagon/GIP/secretin/VIP / Peptide hormone / Glucagon / GIP / secretin / VIP family signature. / Glucagon like hormones / GPCR, family 2, glucagon-like peptide-1/glucagon receptor / G-protein coupled receptors family 2 signature 1. ...GPCR, family 2, glucagon receptor / Glucagon / Transducin (heterotrimeric G protein), gamma chain / G Protein Gi Gamma 2 / Glucagon/GIP/secretin/VIP / Peptide hormone / Glucagon / GIP / secretin / VIP family signature. / Glucagon like hormones / GPCR, family 2, glucagon-like peptide-1/glucagon receptor / G-protein coupled receptors family 2 signature 1. / Hormone receptor domain / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. / Domain present in hormone receptors / GPCR family 2, extracellular hormone receptor domain superfamily / G-protein coupled receptors family 2 signature 2. / GPCR, family 2, secretin-like, conserved site / GPCR, family 2, secretin-like / 7 transmembrane receptor (Secretin family) / GPCR, family 2-like / G-protein coupled receptors family 2 profile 2. / G-protein alpha subunit, group S / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / Few Secondary Structures / Irregular / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
Pro-glucagon / Glucagon receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
Similarity search - Component
Biological speciesHomo sapiens (human)
Lama glama (llama)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsQiao, A. / Han, S. / Tai, L. / Sun, F. / Zhao, Q. / Wu, B.
Funding support China, 8items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2018YFA0507000 China
Ministry of Science and Technology (MoST, China)2017YFA0504703 China
National Science Foundation (NSF, China)31825010 China
National Science Foundation (NSF, China)81525024 China
National Science Foundation (NSF, China)31830020 China
Chinese Academy of SciencesQYZDB-SSW-SMC024 China
Chinese Academy of SciencesQYZDB-SSW-SMC054 China
Ministry of Science and Technology (MoST, China)2018ZX09711002 China
CitationJournal: Science / Year: 2020
Title: Structural basis of G and G recognition by the human glucagon receptor.
Authors: Anna Qiao / Shuo Han / Xinmei Li / Zhixin Li / Peishen Zhao / Antao Dai / Rulve Chang / Linhua Tai / Qiuxiang Tan / Xiaojing Chu / Limin Ma / Thor Seneca Thorsen / Steffen Reedtz-Runge / ...Authors: Anna Qiao / Shuo Han / Xinmei Li / Zhixin Li / Peishen Zhao / Antao Dai / Rulve Chang / Linhua Tai / Qiuxiang Tan / Xiaojing Chu / Limin Ma / Thor Seneca Thorsen / Steffen Reedtz-Runge / Dehua Yang / Ming-Wei Wang / Patrick M Sexton / Denise Wootten / Fei Sun / Qiang Zhao / Beili Wu /
Abstract: Class B G protein-coupled receptors, an important class of therapeutic targets, signal mainly through the G class of heterotrimeric G proteins, although they do display some promiscuity in G protein ...Class B G protein-coupled receptors, an important class of therapeutic targets, signal mainly through the G class of heterotrimeric G proteins, although they do display some promiscuity in G protein binding. Using cryo-electron microscopy, we determined the structures of the human glucagon receptor (GCGR) bound to glucagon and distinct classes of heterotrimeric G proteins, G or G These two structures adopt a similar open binding cavity to accommodate G and G The G binding selectivity of GCGR is explained by a larger interaction interface, but there are specific interactions that affect G more than G binding. Conformational differences in the receptor intracellular loops were found to be key selectivity determinants. These distinctions in transducer engagement were supported by mutagenesis and functional studies.
History
DepositionDec 26, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 1, 2020Provider: repository / Type: Initial release

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Structure visualization

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
C: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
N: Nb35
R: Glucagon receptor
E: Glucagon


Theoretical massNumber of molelcules
Total (without water)159,3156
Polymers159,3156
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area16530 Å2
ΔGint-105 kcal/mol
Surface area50580 Å2

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Components

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Guanine nucleotide-binding protein ... , 3 types, 3 molecules ABC

#1: Protein Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Adenylate cyclase-stimulating G alpha protein


Mass: 45683.434 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1, GSP / Production host: unidentified baculovirus / References: UniProt: P63092
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 38744.371 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: unidentified baculovirus / References: UniProt: P62873
#3: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / G gamma-I


Mass: 7861.143 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNG2 / Production host: unidentified baculovirus / References: UniProt: P59768

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Antibody / Protein / Protein/peptide , 3 types, 3 molecules NRE

#4: Antibody Nb35


Mass: 15140.742 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Lama glama (llama) / Production host: Escherichia coli (E. coli)
#5: Protein Glucagon receptor / / GL-R


Mass: 48398.109 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GCGR / Production host: unidentified baculovirus / References: UniProt: P47871
#6: Protein/peptide Glucagon /


Mass: 3486.781 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human) / References: UniProt: P01275

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Complex of glucagon receptor bound to glucagon, Gs protein and nanobody
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: unidentified baculovirus
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 1.875 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM softwareVersion: 9.03 / Category: image acquisition
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 169878 / Symmetry type: POINT
RefinementStereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 88.54 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00879447
ELECTRON MICROSCOPYf_angle_d0.950512810
ELECTRON MICROSCOPYf_chiral_restr0.05831419
ELECTRON MICROSCOPYf_plane_restr0.00671641
ELECTRON MICROSCOPYf_dihedral_angle_d17.75763366

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