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- PDB-7f4f: Cryo-EM structure of afamelanotide-bound melanocortin-1 receptor ... -

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Basic information

Entry
Database: PDB / ID: 7f4f
TitleCryo-EM structure of afamelanotide-bound melanocortin-1 receptor in complex with Gs protein and scFv16
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Afamelanotide
  • Melanocortin-1 receptorMelanocortin 1 receptor
  • scFv16
KeywordsMEMBRANE PROTEIN / G protein-coupled receptors / MC1R / melanocyte / clacium ion / activation
Function / homology
Function and homology information


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 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 ...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 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 / 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 / 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 / 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 / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / GTPase binding / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
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 / G-protein beta WD-40 repeat ...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 / 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
Similarity search - Domain/homology
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
Similarity search - Component
Biological speciessynthetic construct (others)
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsMa, S. / Chen, Y. / Dai, A. / Yin, W. / Guo, J. / Yang, D. / Zhou, F. / Jiang, Y. / Wang, M.-W. / Xu, H.E.
Funding support China, 1items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2018YFA0507002 China
CitationJournal: Cell Res / Year: 2021
Title: Structural mechanism of calcium-mediated hormone recognition and Gβ interaction by the human melanocortin-1 receptor.
Authors: Shanshan Ma / Yan Chen / Antao Dai / Wanchao Yin / Jia Guo / Dehua Yang / Fulai Zhou / Yi Jiang / Ming-Wei Wang / H Eric Xu /
Abstract: Melanocortins are peptide hormones critical for the regulation of stress response, energy homeostasis, inflammation, and skin pigmentation. Their functions are mediated by five G protein-coupled ...Melanocortins are peptide hormones critical for the regulation of stress response, energy homeostasis, inflammation, and skin pigmentation. Their functions are mediated by five G protein-coupled receptors (MC1R-MC5R), predominately through the stimulatory G protein (Gs). MC1R, the founding member of melanocortin receptors, is mainly expressed in melanocytes and is involved in melanogenesis. Dysfunction of MC1R is associated with the development of melanoma and skin cancer. Here we present three cryo-electron microscopy structures of the MC1R-Gs complexes bound to endogenous hormone α-MSH, a marketed drug afamelanotide, and a synthetic agonist SHU9119. These structures reveal the orthosteric binding pocket for the conserved HFRW motif among melanocortins and the crucial role of calcium ion in ligand binding. They also demonstrate the basis of differential activities among different ligands. In addition, unexpected interactions between MC1R and the Gβ subunit were discovered from these structures. Together, our results elucidate a conserved mechanism of calcium-mediated ligand recognition, a specific mode of G protein coupling, and a universal activation pathway of melanocortin receptors.
History
DepositionJun 18, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 8, 2021Provider: repository / Type: Initial release
Revision 1.1Feb 16, 2022Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

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  • Deposited structure unit
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Assembly

Deposited unit
S: scFv16
R: Melanocortin-1 receptor
A: Guanine nucleotide-binding protein G(i) subunit alpha-1
G: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
F: Afamelanotide
hetero molecules


Theoretical massNumber of molelcules
Total (without water)190,1507
Polymers190,1096
Non-polymers401
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area14530 Å2
ΔGint-103 kcal/mol
Surface area46300 Å2

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Components

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

#3: Protein Guanine nucleotide-binding protein G(i) subunit alpha-1


Mass: 41879.465 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1, GSP, GNAI1 / Production host: Trichoplusia ni (cabbage looper)
#4: 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: Trichoplusia ni (cabbage looper) / References: UniProt: P59768
#5: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 40226.992 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P62873

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Antibody / Protein / Protein/peptide / Non-polymers , 4 types, 4 molecules SRF

#1: Antibody scFv16


Mass: 30363.043 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Trichoplusia ni (cabbage looper)
#2: Protein Melanocortin-1 receptor / Melanocortin 1 receptor


Mass: 68170.031 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: MC1R, MSHR / Production host: Trichoplusia ni (cabbage looper)
#6: Protein/peptide Afamelanotide /


Mass: 1608.818 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#7: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY

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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

Component
IDNameTypeEntity IDParent-IDSource
1Cryo-EM structure of afamelanotide-bound melanocortin-1 receptor in complex with Gs protein and scFv16COMPLEX#1-#60RECOMBINANT
2scFv16COMPLEX#11RECOMBINANT
3Melanocortin-1 receptorMelanocortin 1 receptorCOMPLEX#21RECOMBINANT
4Guanine nucleotide-binding protein G(i) subunit alpha-1COMPLEX#31RECOMBINANT
5Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2COMPLEX#41RECOMBINANT
6Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1COMPLEX#51RECOMBINANT
7AfamelanotideCOMPLEX#61SYNTHETIC
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21synthetic construct (others)32630
32Homo sapiens (human)9606
43Homo sapiens (human)9606
54Homo sapiens (human)9606
65Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Escherichia coli (E. coli)562
32Trichoplusia ni (cabbage looper)7111
43Trichoplusia ni (cabbage looper)7111
54Trichoplusia ni (cabbage looper)7111
65Trichoplusia ni (cabbage looper)7111
Buffer solutionpH: 7.4
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: OTHER
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 80 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19_4092: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 312962 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.019061
ELECTRON MICROSCOPYf_angle_d1.09612280
ELECTRON MICROSCOPYf_dihedral_angle_d12.5743242
ELECTRON MICROSCOPYf_chiral_restr0.0641407
ELECTRON MICROSCOPYf_plane_restr0.0121556

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