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- EMDB-13454: Active Melanocortin-4 receptor (MC4R)- Gs protein complex bound t... -

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Entry
Database: EMDB / ID: EMD-13454
TitleActive Melanocortin-4 receptor (MC4R)- Gs protein complex bound to agonist NDP-alpha-MSH at 2.86 A resolution.
Map data
Sample
  • Complex: Ternary complex of the NDP-alpha-MSH activated melanocortin 4 receptor (MC4R) Gs protein complex stabilized by nanobody 35
    • Protein or peptide: Melanocortin receptor 4
    • Protein or peptide: NDP-alpha-MSH (other names Afamelanotide; Scenesse)
    • Protein or peptide: Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Camelid antibody VHH fragment - nanobody 35
  • Ligand: CALCIUM ION
  • Ligand: water
KeywordsGPCR / MELANOCORTIN-4 RECEPTOR / MELANOCORTIN RECEPTORS / SETMELANOTIDE / NDP-ALPHA-MSH / ALPHA-18 MSH / ANTAGONISM / AGONISM / APPETITE REGULATION / ANTI-OBESITY TREATMENT / SIGNALING PROTEIN
Function / homology
Function and homology information


regulation of eating behavior / response to melanocyte-stimulating hormone / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Prostacyclin signalling through prostacyclin receptor / melanocyte-stimulating hormone receptor activity / G alpha (z) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 ...regulation of eating behavior / response to melanocyte-stimulating hormone / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Prostacyclin signalling through prostacyclin receptor / melanocyte-stimulating hormone receptor activity / G alpha (z) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / melanocortin receptor activity / 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 / G alpha (12/13) signalling events / Extra-nuclear estrogen signaling / G alpha (q) signalling events / 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 / neuropeptide binding / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / positive regulation of bone resorption / G alpha (z) signalling events / feeding behavior / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / G alpha (i) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / insulin secretion / regulation of metabolic process / photoreceptor outer segment membrane / response to food / spectrin binding / alkylglycerophosphoethanolamine phosphodiesterase activity / PKA activation in glucagon signalling / developmental growth / hair follicle placode formation / photoreceptor outer segment / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / activation of adenylate cyclase activity / Hedgehog 'off' state / adenylate cyclase-activating adrenergic receptor signaling pathway / cardiac muscle cell apoptotic process / photoreceptor inner segment / cellular response to glucagon stimulus / Transcriptional and post-translational regulation of MITF-M expression and activity / regulation of insulin secretion / Peptide ligand-binding receptors / adenylate cyclase activator activity / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / response to insulin / bone development / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / platelet aggregation / cognition / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of smell / adenylate cyclase-activating dopamine receptor signaling pathway / GPER1 signaling / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding
Similarity search - Function
Melanocortin 4 receptor / Melanocortin receptor 3-5 / Melanocortin/ACTH receptor / G-protein alpha subunit, group S / Serpentine type 7TM GPCR chemoreceptor Srsx / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit ...Melanocortin 4 receptor / Melanocortin receptor 3-5 / Melanocortin/ACTH receptor / G-protein alpha subunit, group S / Serpentine type 7TM GPCR chemoreceptor Srsx / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Melanocortin receptor 4 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Similarity search - Component
Biological speciesHomo sapiens (human) / synthetic construct (others) / Rattus norvegicus (Norway rat) / Mus musculus (house mouse) / Lama glama (llama)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.86 Å
AuthorsHeyder NA / Schmidt A / Kleinau G / Hilal T / Scheerer P
Funding support Germany, 3 items
OrganizationGrant numberCountry
German Research Foundation (DFG)CRC1423, project number 421152132, subprojects A01, A05, Z03, B02, C01, Z04 Germany
German Research Foundation (DFG)CRC1365, project number 394046635, subproject A03 Germany
German Research Foundation (DFG)Excellence Strategies - EXC2008/1 (UniSysCat) - 390540038 Germany
CitationJournal: Cell Res / Year: 2021
Title: Structures of active melanocortin-4 receptor-Gs-protein complexes with NDP-α-MSH and setmelanotide.
Authors: Nicolas A Heyder / Gunnar Kleinau / David Speck / Andrea Schmidt / Sarah Paisdzior / Michal Szczepek / Brian Bauer / Anja Koch / Monique Gallandi / Dennis Kwiatkowski / Jörg Bürger / ...Authors: Nicolas A Heyder / Gunnar Kleinau / David Speck / Andrea Schmidt / Sarah Paisdzior / Michal Szczepek / Brian Bauer / Anja Koch / Monique Gallandi / Dennis Kwiatkowski / Jörg Bürger / Thorsten Mielke / Annette G Beck-Sickinger / Peter W Hildebrand / Christian M T Spahn / Daniel Hilger / Magdalena Schacherl / Heike Biebermann / Tarek Hilal / Peter Kühnen / Brian K Kobilka / Patrick Scheerer /
Abstract: The melanocortin-4 receptor (MC4R), a hypothalamic master regulator of energy homeostasis and appetite, is a class A G-protein-coupled receptor and a prime target for the pharmacological treatment of ...The melanocortin-4 receptor (MC4R), a hypothalamic master regulator of energy homeostasis and appetite, is a class A G-protein-coupled receptor and a prime target for the pharmacological treatment of obesity. Here, we present cryo-electron microscopy structures of MC4R-Gs-protein complexes with two drugs recently approved by the FDA, the peptide agonists NDP-α-MSH and setmelanotide, with 2.9 Å and 2.6 Å resolution. Together with signaling data from structure-derived MC4R mutants, the complex structures reveal the agonist-induced origin of transmembrane helix (TM) 6-regulated receptor activation. The ligand-binding modes of NDP-α-MSH, a high-affinity linear variant of the endogenous agonist α-MSH, and setmelanotide, a cyclic anti-obesity drug with biased signaling toward Gq/11, underline the key role of TM3 in ligand-specific interactions and of calcium ion as a ligand-adaptable cofactor. The agonist-specific TM3 interplay subsequently impacts receptor-Gs-protein interfaces at intracellular loop 2, which also regulates the G-protein coupling profile of this promiscuous receptor. Finally, our structures reveal mechanistic details of MC4R activation/inhibition, and provide important insights into the regulation of the receptor signaling profile which will facilitate the development of tailored anti-obesity drugs.
History
DepositionAug 23, 2021-
Header (metadata) releaseNov 17, 2021-
Map releaseNov 17, 2021-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.05
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  • Surface view with fitted model
  • Atomic models: PDB-7piv
  • Surface level: 0.05
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_13454.png

Downloads & links

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Map

FileDownload / File: emd_13454.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 280 pix.
= 232.96 Å		0.83 Å/pix.
x 280 pix.
= 232.96 Å		0.83 Å/pix.
x 280 pix.
= 232.96 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.832 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.28790507 - 0.9382599
Average (Standard dev.)0.00088605745 (±0.010255964)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 232.96 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.8320.8320.832
M x/y/z280280280
origin x/y/z0.0000.0000.000
length x/y/z232.960232.960232.960
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ470470470
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS280280280
D min/max/mean-0.2880.9380.001

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Supplemental data

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Sample components

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Entire : Ternary complex of the NDP-alpha-MSH activated melanocortin 4 rec...

EntireName: Ternary complex of the NDP-alpha-MSH activated melanocortin 4 receptor (MC4R) Gs protein complex stabilized by nanobody 35
Components
  • Complex: Ternary complex of the NDP-alpha-MSH activated melanocortin 4 receptor (MC4R) Gs protein complex stabilized by nanobody 35
    • Protein or peptide: Melanocortin receptor 4
    • Protein or peptide: NDP-alpha-MSH (other names Afamelanotide; Scenesse)
    • Protein or peptide: Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Camelid antibody VHH fragment - nanobody 35
  • Ligand: CALCIUM ION
  • Ligand: water

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Supramolecule #1: Ternary complex of the NDP-alpha-MSH activated melanocortin 4 rec...

SupramoleculeName: Ternary complex of the NDP-alpha-MSH activated melanocortin 4 receptor (MC4R) Gs protein complex stabilized by nanobody 35
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#6
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 144.6 kDa/nm

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Macromolecule #1: Melanocortin receptor 4

MacromoleculeName: Melanocortin receptor 4 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.69852 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DYKDDDDKMV NSTHRGMHTS LHLWNRSSYR LHSNASESLG KGYSDGGCYE QLFVSPEVFV TLGVISLLEN ILVIVAIAKN KNLHSPMYF FICSLAVADM LVSVSNGSET IVITLLNSTD TDAQSFTVNI DNVIDSVICS SLLASICSLL SIAVDRYFTI F YALQYHNI ...String:
DYKDDDDKMV NSTHRGMHTS LHLWNRSSYR LHSNASESLG KGYSDGGCYE QLFVSPEVFV TLGVISLLEN ILVIVAIAKN KNLHSPMYF FICSLAVADM LVSVSNGSET IVITLLNSTD TDAQSFTVNI DNVIDSVICS SLLASICSLL SIAVDRYFTI F YALQYHNI MTVKRVGIII SCIWAACTVS GILFIIYSDS SAVIICLITM FFTMLALMAS LYVHMFLMAR LHIKRIAVLP GT GAIRQGA NMKGAITLTI LIGVFVVCWA PFFLHLIFYI SCPQNPYCVC FMSHFNLYLI LIMCNSIIDP LIYALRSQEL RKT FKEIIC CYPLGGLCDL SSRYLEVLFQ

UniProtKB: Melanocortin receptor 4

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Macromolecule #2: NDP-alpha-MSH (other names Afamelanotide; Scenesse)

MacromoleculeName: NDP-alpha-MSH (other names Afamelanotide; Scenesse) / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 1.632863 KDa
SequenceString:
(ACE)SYS(NLE)EH(DPN)RW GKPV(NH2)

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Macromolecule #3: Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit...

MacromoleculeName: Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 44.32616 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MGCLGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGAGE SGKSTIVKQM RILHVNGFNG DSEKATKVQD IKNNLKEAI ETIVAAMSNL VPPVELANPE NQFRVDYILS VMNVPDFDFP PEFYEHAKAL WEDEGVRACY ERSNEYQLID C AQYFLDKI ...String:
MGCLGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGAGE SGKSTIVKQM RILHVNGFNG DSEKATKVQD IKNNLKEAI ETIVAAMSNL VPPVELANPE NQFRVDYILS VMNVPDFDFP PEFYEHAKAL WEDEGVRACY ERSNEYQLID C AQYFLDKI DVIKQADYVP SDQDLLRCRV LTSGIFETKF QVDKVNFHMF DVGGQRDERR KWIQCFNDVT AIIFVVASSS YN MVIREDN QTNRLQEALN LFKSIWNNRW LRTISVILFL NKQDLLAEKV LAGKSKIEDY FPEFARYTTP EDATPEPGED PRV TRAKYF IRDEFLRIST ASGDGRHYCY PHFTCAVDTE NIRRVFNDCR DIIQRMHLRQ YELL

UniProtKB: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

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Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 37.728152 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String:
GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWN

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #5: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Macromolecule #6: Camelid antibody VHH fragment - nanobody 35

MacromoleculeName: Camelid antibody VHH fragment - nanobody 35 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Lama glama (llama)
Molecular weightTheoretical: 14.71432 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
QVQLQESGGG LVQPGGSLRL SCAASGFTFS NYKMNWVRQA PGKGLEWVSD ISQSGASISY TGSVKGRFTI SRDNAKNTLY LQMNSLKPE DTAVYYCARC PAPFTRDCFD VTSTTYAYRG QGTQVTVSSH HHHHH

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Macromolecule #7: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 7 / Number of copies: 1 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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Macromolecule #8: water

MacromoleculeName: water / type: ligand / ID: 8 / Number of copies: 115 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1.2 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
20.0 mMC8H18N2O4SHEPES
150.0 mMNaClSodium chloride
0.025 mMC9H15O6PTris(2-carboxyethyl)phosphin
1.0 mMCaCl2calcium chloride
0.001 mMC78H111N21O19NDP-alpha-MSH
0.00075 %C47H88O222,2-didecylpropane-1,3-bis-beta-D-maltopyranoside
0.00025 %C56H92O25GDN101
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 283 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 5618 / Average exposure time: 40.78 sec. / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 96000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 2746119
Startup modelType of model: OTHER
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.86 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 2.18) / Number images used: 221682
Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: cryoSPARC (ver. 2.15)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 2.15)
Final 3D classificationSoftware - Name: cryoSPARC (ver. 2.15)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

3sn6

source_name: PDB, initial_model_type: experimental model

6w25

source_name: PDB, initial_model_type: experimental model
RefinementSpace: REAL / Protocol: OTHER
Output model

PDB-7piv:
Active Melanocortin-4 receptor (MC4R)- Gs protein complex bound to agonist NDP-alpha-MSH at 2.86 A resolution.

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