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Yorodumi- EMDB-62014: Cryo-EM structure of the unliganded human melanocortin receptor 3... -
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Basic information
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| Title | Cryo-EM structure of the unliganded human melanocortin receptor 3 (MC3R)-Gs complex | ||||||||||||||||||
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Keywords | human melanocortin receptor 3 / G protein-coupled receptor / unliganded / constitutive activity / MEMBRANE PROTEIN | ||||||||||||||||||
| Function / homology | Function and homology informationhomoiothermy / melanocyte-stimulating hormone receptor activity / melanocortin receptor activity / regulation of feeding behavior / sodium ion homeostasis / neuropeptide binding / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor ...homoiothermy / melanocyte-stimulating hormone receptor activity / melanocortin receptor activity / regulation of feeding behavior / sodium ion homeostasis / neuropeptide binding / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / regulation of metabolic process / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / Thrombin signalling through proteinase activated receptors (PARs) / G alpha (z) signalling events / Extra-nuclear estrogen signaling / G alpha (s) signalling events / G alpha (q) signalling events / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / locomotor rhythm / peptide hormone binding / PKA activation in glucagon signalling / developmental growth / hair follicle placode formation / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / activation of adenylate cyclase activity / adenylate cyclase inhibitor activity / Hedgehog 'off' state / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory pathway / adenylate cyclase-activating adrenergic receptor signaling pathway / 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 / cellular response to glucagon stimulus / Transcriptional and post-translational regulation of MITF-M expression and activity / regulation of insulin secretion / cellular response to forskolin / regulation of heart rate / regulation of mitotic spindle organization / Peptide ligand-binding receptors / adenylate cyclase activator activity / trans-Golgi network membrane / Regulation of insulin secretion / negative regulation of inflammatory response to antigenic stimulus / circadian regulation of gene expression / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / response to peptide hormone / bone development / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / regulation of blood pressure / platelet aggregation / G-protein beta/gamma-subunit complex binding / centriolar satellite / cognition / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-activating 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 / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / photoreceptor disc membrane / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins Similarity search - Function | ||||||||||||||||||
| Biological species | Homo sapiens (human) / synthetic construct (others) / ![]() | ||||||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.75 Å | ||||||||||||||||||
Authors | Feng WB / Zhou QT / Zheng C / Yang DH / Wang MW / Liu X / Zhao FH / Chen Y / Ye CY / Xu YN ...Feng WB / Zhou QT / Zheng C / Yang DH / Wang MW / Liu X / Zhao FH / Chen Y / Ye CY / Xu YN / Cong ZT / Li H / Lin S | ||||||||||||||||||
| Funding support | China, 5 items
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Citation | Journal: Structure / Year: 2025Title: Structural basis for the constitutive activity of the melanocortin receptor family. Authors: Wenbo Feng / Qingtong Zhou / Chang Zheng / Dehua Yang / Ming-Wei Wang / ![]() Abstract: The constitutive activity of melanocortin receptors (MCRs) is integral to several physiological processes. The unliganded cryo-electron microscopy structures of MC1R, MC2R, MC3R, MC4R, and MC5R in ...The constitutive activity of melanocortin receptors (MCRs) is integral to several physiological processes. The unliganded cryo-electron microscopy structures of MC1R, MC2R, MC3R, MC4R, and MC5R in complex with G proteins determined at global resolutions of 2.98 Å, 3.01 Å, 2.75 Å, 3.12 Å, and 2.86 Å, respectively, revealed that their binding poses and interactions with G are similar to those of agonist-bound MCRs. The extracellular regions of the transmembrane helices (TMs) exhibit distinct conformational rearrangements, characterized by varying shifts of TM3 and outward displacements of TM4. These variations represent unique structural features of constitutively activated MCRs. Unassigned electron densities were observed within the orthosteric pockets where extensive interactions with cognate ligands occur. In addition, zinc ions, but not calcium, positively regulated MC4R activity in a dose-dependent manner. Our findings provide valuable insights into the molecular mechanisms underlying MCR basal activity and highlight the role of divalent ions in receptor activation. | ||||||||||||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_62014.map.gz | 56.9 MB | EMDB map data format | |
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| Header (meta data) | emd-62014-v30.xml emd-62014.xml | 21.3 KB 21.3 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_62014_fsc.xml | 8.4 KB | Display | FSC data file |
| Images | emd_62014.png | 56.2 KB | ||
| Filedesc metadata | emd-62014.cif.gz | 6.8 KB | ||
| Others | emd_62014_half_map_1.map.gz emd_62014_half_map_2.map.gz | 59.4 MB 59.4 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-62014 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-62014 | HTTPS FTP |
-Validation report
| Summary document | emd_62014_validation.pdf.gz | 623.5 KB | Display | EMDB validaton report |
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| Full document | emd_62014_full_validation.pdf.gz | 623.1 KB | Display | |
| Data in XML | emd_62014_validation.xml.gz | 16 KB | Display | |
| Data in CIF | emd_62014_validation.cif.gz | 21.1 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-62014 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-62014 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9k3fMC ![]() 9k3hC ![]() 9k3kC ![]() 9k3lC ![]() 9k3pC 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_62014.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.071 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: #2
| File | emd_62014_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_62014_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
-Entire : Cryo-EM structure of unliganded human melanocortin receptor 3 in ...
| Entire | Name: Cryo-EM structure of unliganded human melanocortin receptor 3 in complex with Gs protein |
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| Components |
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-Supramolecule #1: Cryo-EM structure of unliganded human melanocortin receptor 3 in ...
| Supramolecule | Name: Cryo-EM structure of unliganded human melanocortin receptor 3 in complex with Gs protein type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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| Source (natural) | Organism: Homo sapiens (human) |
-Macromolecule #1: Melanocortin receptor 3,Melanocortin receptor 3,Melanocortin rece...
| Macromolecule | Name: Melanocortin receptor 3,Melanocortin receptor 3,Melanocortin receptor 3,LgBiT subunit type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: synthetic construct (others) |
| Molecular weight | Theoretical: 54.666828 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MNASCCLPSV QPTLPNGSEH LQAPFFSNQS SSAFCEQVFI KPEVFLSLGI VSLLENILVI LAVVRNGNLH SPMYFFLCSL AVADMLVSV SNALETIMIA IVHSDYLTFE DQFIQHMDNI FDSMICISLV ASICNLLAIA VDRYVTIFYA LRYHSIMTVR K ALTLIVAI ...String: MNASCCLPSV QPTLPNGSEH LQAPFFSNQS SSAFCEQVFI KPEVFLSLGI VSLLENILVI LAVVRNGNLH SPMYFFLCSL AVADMLVSV SNALETIMIA IVHSDYLTFE DQFIQHMDNI FDSMICISLV ASICNLLAIA VDRYVTIFYA LRYHSIMTVR K ALTLIVAI WVCCGVCGVV FIVYSESKMV IVCLITMFFA MMLLMGTLYV HMFLFARLHV KRIAALPPAD GVAPQQHSCM KG AVTITIL LGVFIFCWAP FFLHLVLIIT CPTNPYCICY TAHFNTYLVL IMCNSVIDPL IYAFRSLELR NTFREILCGC NGM NLGGSS GGGGSGGGGS SGVFTLEDFV GDWEQTAAYN LDQVLEQGGV SSLLQNLAVS VTPIQRIVRS GENALKIDIH VIIP YEGLS ADQMAQIEEV FKVVYPVDDH HFKVILPYGT LVIDGVTPNM LNYFGRPYEG IAVFDGKKIT VTGTLWNGNK IIDER LITP DGSMLFRVTI NS UniProtKB: Melanocortin receptor 3 |
-Macromolecule #2: Guanine nucleotide-binding protein G(i) subunit alpha-1,Guanine n...
| Macromolecule | Name: Guanine nucleotide-binding protein G(i) subunit alpha-1,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO EC number: Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 41.879465 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RATHRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String: MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RATHRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTSGIFETK FQVDKVNFHM FDVGAQRDER RKWIQCFNDV TAIIFVVDSS DYNRLQEALN DF KSIWNNR WLRTISVILF LNKQDLLAEK VLAGKSKIED YFPEFARYTT PEDATPEPGE DPRVTRAKYF IRDEFLRIST ASG DGRHYC YPHFTCSVDT ENARRIFNDC RDIIQRMHLR QYELL UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1, Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(i) subunit alpha-1, ...UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1, Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(i) subunit alpha-1, Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(s) subunit alpha isoforms short |
-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,Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1,Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1,HiBiT type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: synthetic construct (others) |
| Molecular weight | Theoretical: 40.226992 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String: MGSLLQSELD 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 WDSFLKIWNG SSGGGGSGGG GSSGVSGWRL FKKIS 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: 7.861143 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-Macromolecule #5: scFv16
| Macromolecule | Name: scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: synthetic construct (others) |
| Molecular weight | Theoretical: 30.363043 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MLLVNQSHQG FNKEHTSKMV SAIVLYVLLA AAAHSAFAVQ LVESGGGLVQ PGGSRKLSCS ASGFAFSSFG MHWVRQAPEK GLEWVAYIS SGSGTIYYAD TVKGRFTISR DDPKNTLFLQ MTSLRSEDTA MYYCVRSIYY YGSSPFDFWG QGTTLTVSAG G GGSGGGGS ...String: MLLVNQSHQG FNKEHTSKMV SAIVLYVLLA AAAHSAFAVQ LVESGGGLVQ PGGSRKLSCS ASGFAFSSFG MHWVRQAPEK GLEWVAYIS SGSGTIYYAD TVKGRFTISR DDPKNTLFLQ MTSLRSEDTA MYYCVRSIYY YGSSPFDFWG QGTTLTVSAG G GGSGGGGS GGGGSADIVM TQATSSVPVT PGESVSISCR SSKSLLHSNG NTYLYWFLQR PGQSPQLLIY RMSNLASGVP DR FSGSGSG TAFTLTISRL EAEDVGVYYC MQHLEYPLTF GAGTKLEL |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.4 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 80.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.2 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
China, 5 items
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Processing
FIELD EMISSION GUN


