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- EMDB-27633: Cryo-EM structure of the 5HT2C receptor (INI isoform) bound to lo... -

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Basic information

Entry
Database: EMDB / ID: EMD-27633
TitleCryo-EM structure of the 5HT2C receptor (INI isoform) bound to lorcaserin
Map datadeepEMhancer sharp map
Sample
  • Complex: 5-ht2c heterotrimeric complex (INI isoform)
    • Protein or peptide: 5-hydroxytryptamine receptor 2C
    • Protein or peptide: G-alpha subunit q (Gi2-mini-Gq chimeric)G alpha subunit
    • 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: Antibody fragment scFv16
  • Ligand: (1R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine
  • Ligand: CHOLESTEROL
Function / homology
Function and homology information


regulation of corticotropin-releasing hormone secretion / 1-(4-iodo-2,5-dimethoxyphenyl)propan-2-amine binding / Gq/11-coupled serotonin receptor activity / phospholipase C-activating serotonin receptor signaling pathway / positive regulation of phosphatidylinositol biosynthetic process / G protein-coupled serotonin receptor signaling pathway / G protein-coupled serotonin receptor complex / regulation of appetite / regulation of nervous system process / Serotonin receptors ...regulation of corticotropin-releasing hormone secretion / 1-(4-iodo-2,5-dimethoxyphenyl)propan-2-amine binding / Gq/11-coupled serotonin receptor activity / phospholipase C-activating serotonin receptor signaling pathway / positive regulation of phosphatidylinositol biosynthetic process / G protein-coupled serotonin receptor signaling pathway / G protein-coupled serotonin receptor complex / regulation of appetite / regulation of nervous system process / Serotonin receptors / serotonin binding / G protein-coupled serotonin receptor activity / feeding behavior / neurotransmitter receptor activity / cGMP-mediated signaling / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / positive regulation of fat cell differentiation / behavioral fear response / positive regulation of calcium-mediated signaling / release of sequestered calcium ion into cytosol / locomotory behavior / 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 / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / intracellular calcium ion homeostasis / 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 / 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 / sensory perception of taste / GPER1 signaling / 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) / 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 / chemical synaptic transmission / G alpha (q) signalling events / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / positive regulation of ERK1 and ERK2 cascade / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / dendrite / protein-containing complex binding / signal transduction / extracellular exosome / membrane / identical protein binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
5-Hydroxytryptamine 2C receptor / 5-hydroxytryptamine receptor family / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 ...5-Hydroxytryptamine 2C receptor / 5-hydroxytryptamine receptor family / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 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. / 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
5-hydroxytryptamine receptor 2C / 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 speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.84 Å
AuthorsGumpper RH / Fay JF / Roth BL
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Mental Health (NIH/NIMH) United States
CitationJournal: Cell Rep / Year: 2022
Title: Molecular insights into the regulation of constitutive activity by RNA editing of 5HT serotonin receptors.
Authors: Ryan H Gumpper / Jonathan F Fay / Bryan L Roth /
Abstract: RNA editing is a process by which post-transcriptional changes of mRNA nucleotides alter protein function through modification of the amino acid content. The 5HT serotonin receptor, which undergoes ...RNA editing is a process by which post-transcriptional changes of mRNA nucleotides alter protein function through modification of the amino acid content. The 5HT serotonin receptor, which undergoes 32 distinct RNA-editing events leading to 24 protein isoforms, is a notable example of this process. These 5HT isoforms display differences in constitutive activity, agonist/inverse agonist potencies, and efficacies. To elucidate the molecular mechanisms responsible for these effects of RNA editing, we present four active-state 5HT-transducer-coupled structures of three representative isoforms (INI, VGV, and VSV) with the selective drug lorcaserin (Belviq) and the classic psychedelic psilocin. We also provide a comprehensive analysis of agonist activation and constitutive activity across all 24 protein isoforms. Collectively, these findings reveal a unique hydrogen-bonding network located on intracellular loop 2 that is subject to RNA editing, which differentially affects GPCR constitutive and agonist signaling activities.
History
DepositionJul 15, 2022-
Header (metadata) releaseAug 24, 2022-
Map releaseAug 24, 2022-
UpdateAug 31, 2022-
Current statusAug 31, 2022Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_27633.png

Downloads & links

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Map

FileDownload / File: emd_27633.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationdeepEMhancer sharp map
Voxel sizeX=Y=Z: 0.91 Å
Density
Contour LevelBy AUTHOR: 0.09
Minimum - Maximum-0.02249975 - 1.7055554
Average (Standard dev.)0.0010990575 (±0.021965578)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 262.08002 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Bfactor sharp map

Fileemd_27633_additional_1.map
AnnotationBfactor sharp map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: halfmap A

Fileemd_27633_half_map_1.map
Annotationhalfmap A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: halfmap B

Fileemd_27633_half_map_2.map
Annotationhalfmap B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : 5-ht2c heterotrimeric complex (INI isoform)

EntireName: 5-ht2c heterotrimeric complex (INI isoform)
Components
  • Complex: 5-ht2c heterotrimeric complex (INI isoform)
    • Protein or peptide: 5-hydroxytryptamine receptor 2C
    • Protein or peptide: G-alpha subunit q (Gi2-mini-Gq chimeric)G alpha subunit
    • 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: Antibody fragment scFv16
  • Ligand: (1R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine
  • Ligand: CHOLESTEROL

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Supramolecule #1: 5-ht2c heterotrimeric complex (INI isoform)

SupramoleculeName: 5-ht2c heterotrimeric complex (INI isoform) / type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)

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Macromolecule #1: 5-hydroxytryptamine receptor 2C

MacromoleculeName: 5-hydroxytryptamine receptor 2C / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 51.876066 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MVNLRNAVHS FLVHLIGLLV WQCDISVSPV AAIVTDIFNT SDGGRFKFPD GVQNWPALSI VIIIIMTIGG NILVIMAVSM EKKLHNATN YFLMSLAIAD MLVGLLVMPL SLLAILYDYV WPLPRYLCPV WISLDVLFST ASIMHLCAIS LDRYVAIRNP I EHSRFNSR ...String:
MVNLRNAVHS FLVHLIGLLV WQCDISVSPV AAIVTDIFNT SDGGRFKFPD GVQNWPALSI VIIIIMTIGG NILVIMAVSM EKKLHNATN YFLMSLAIAD MLVGLLVMPL SLLAILYDYV WPLPRYLCPV WISLDVLFST ASIMHLCAIS LDRYVAIRNP I EHSRFNSR TKAIMKIAIV WAISIGVSVP IPVIGLRDEE KVFVNNTTCV LNDPNFVLIG SFVAFFIPLT IMVITYCLTI YV LRRQALM LLHGHTEEPP GLSLDFLKCC KRNTAEEENS ANPNQDQNAR RRKKKERRPR GTMQAINNER KASKVLGIVF FVF LIMWCP FFITNILSVL CEKSCNQKLM EKLLNVFVWI GYVCSGINPL VYTLFNKIYR RAFSNYLRCN YKVEKKPPVR QIPR VAATA LSGRELNVNI YRHTNEPVIE KASDNEPGIE MQVENLELPV NPSSVVSERI SSV

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Macromolecule #2: G-alpha subunit q (Gi2-mini-Gq chimeric)

MacromoleculeName: G-alpha subunit q (Gi2-mini-Gq chimeric) / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.084832 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGSTVSAEDK AAAERSKMID KNLREDGEKA RRTLRLLLLG ADNSGKSTIV KQMRILHGGS GGSGGTSGIF ETKFQVDKVN FHMFDVGGQ RDERRKWIQC FNDVTAIIFV VDSSDYNRLQ EALNDFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK I EDYFPEFA ...String:
MGSTVSAEDK AAAERSKMID KNLREDGEKA RRTLRLLLLG ADNSGKSTIV KQMRILHGGS GGSGGTSGIF ETKFQVDKVN FHMFDVGGQ RDERRKWIQC FNDVTAIIFV VDSSDYNRLQ EALNDFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK I EDYFPEFA RYTTPEDATP EPGEDPRVTR AKYFIRKEFV DISTASGDGR HICYPHFTCA VDTENARRIF NDCKDIILQM NL REYNLV

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Macromolecule #3: 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: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 39.418086 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHHHLEV LFQGPGSSGS ELDQLRQEAE QLKNQIRDAR KACADATLSQ ITNNIDPVGR IQMRTRRTLR GHLAKIYAMH WGTDSRLLV SASQDGKLII WDSYTTNKVH AIPLRSSWVM TCAYAPSGNY VACGGLDNIC SIYNLKTREG NVRVSRELAG H TGYLSCCR ...String:
MHHHHHHLEV LFQGPGSSGS ELDQLRQEAE QLKNQIRDAR KACADATLSQ ITNNIDPVGR IQMRTRRTLR GHLAKIYAMH WGTDSRLLV SASQDGKLII WDSYTTNKVH AIPLRSSWVM TCAYAPSGNY VACGGLDNIC SIYNLKTREG NVRVSRELAG H TGYLSCCR FLDDNQIVTS SGDTTCALWD IETGQQTTTF TGHTGDVMSL SLAPDTRLFV SGACDASAKL WDVREGMCRQ TF TGHESDI NAICFFPNGN AFATGSDDAT CRLFDLRADQ ELMTYSHDNI ICGITSVSFS KSGRLLLAGY DDFNCNVWDA LKA DRAGVL AGHDNRVSCL GVTDDGMAVA TGSWDSFLKI WN

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Macromolecule #4: 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: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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Macromolecule #5: Antibody fragment scFv16

MacromoleculeName: Antibody fragment scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.668922 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: 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 KAAALEVLFQ GPHHHHHHHH

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Macromolecule #6: (1R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine

MacromoleculeName: (1R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine
type: ligand / ID: 6 / Number of copies: 1 / Formula: T4U
Molecular weightTheoretical: 195.689 Da
Chemical component information

ChemComp-T4U:
(1R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine / Lorcaserin

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Macromolecule #7: CHOLESTEROL

MacromoleculeName: CHOLESTEROL / type: ligand / ID: 7 / Number of copies: 1 / Formula: CLR
Molecular weightTheoretical: 386.654 Da
Chemical component information

ChemComp-CLR:
CHOLESTEROL / Cholesterol

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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

BufferpH: 7.4
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.551 µm / Nominal defocus min: 0.421 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 49.6 e/Å2
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6bqg

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.84 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 981836
FSC plot (resolution estimation)

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