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- EMDB-33444: Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex -

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Entry
Database: EMDB / ID: EMD-33444
TitleSerotonin 4 (5-HT4) receptor-Gi-scFv16 complex
Map data
Sample
  • Complex: Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: scFv16
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Soluble cytochrome b562,5-hydroxytryptamine receptor 4
  • Ligand: SEROTONIN
KeywordsGPCR / serotonin receptor / 5-HT / 5-HT4 receptor / signaling complex / cryo-EM structure / ligand selectivity / G protein selectivity / structure-function relationships / MEMBRANE PROTEIN
Function / homology
Function and homology information


large intestinal transit / adenylate cyclase-activating serotonin receptor signaling pathway / regulation of appetite / maintenance of gastrointestinal epithelium / mucus secretion / Serotonin receptors / serotonin receptor activity / G protein-coupled serotonin receptor activity / neurotransmitter receptor activity / serotonin binding ...large intestinal transit / adenylate cyclase-activating serotonin receptor signaling pathway / regulation of appetite / maintenance of gastrointestinal epithelium / mucus secretion / Serotonin receptors / serotonin receptor activity / G protein-coupled serotonin receptor activity / neurotransmitter receptor activity / serotonin binding / regulation of postsynapse assembly / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory 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 forskolin / regulation of mitotic spindle organization / Regulation of insulin secretion / positive regulation of cholesterol biosynthetic process / electron transport chain / negative regulation of insulin secretion / G protein-coupled receptor binding / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / centriolar satellite / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / adenylate cyclase-activating G protein-coupled receptor 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-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 / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / 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 / GDP binding / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / ADP signalling through P2Y purinoceptor 1 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / G-protein beta-subunit binding / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / Inactivation, recovery and regulation of the phototransduction cascade / G alpha (12/13) signalling events / extracellular vesicle / sensory perception of taste / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / G protein activity / retina development in camera-type eye / GTPase binding / Ca2+ pathway / fibroblast proliferation / midbody / cell cortex / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / chemical synaptic transmission / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / Ras protein signal transduction / electron transfer activity / periplasmic space / Extra-nuclear estrogen signaling / cell population proliferation / postsynapse / endosome membrane / ciliary basal body / iron ion binding / G protein-coupled receptor signaling pathway / lysosomal membrane / cell division / GTPase activity
Similarity search - Function
5-Hydroxytryptamine 4 receptor / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / G-protein alpha subunit, group I / 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. ...5-Hydroxytryptamine 4 receptor / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / G-protein alpha subunit, group I / 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
Soluble cytochrome b562 / 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(i) subunit alpha-1 / 5-hydroxytryptamine receptor 4
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsHuang S / Xu P / Shen DD / Simon IA / Mao C / Tan Y / Zhang H / Harpsoe K / Li H / Zhang Y ...Huang S / Xu P / Shen DD / Simon IA / Mao C / Tan Y / Zhang H / Harpsoe K / Li H / Zhang Y / You C / Yu X / Jiang Y / Gloriam DE / Xu HE
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31770796 China
CitationJournal: Mol Cell / Year: 2022
Title: GPCRs steer G and G selectivity via TM5-TM6 switches as revealed by structures of serotonin receptors.
Authors: Sijie Huang / Peiyu Xu / Dan-Dan Shen / Icaro A Simon / Chunyou Mao / Yangxia Tan / Huibing Zhang / Kasper Harpsøe / Huadong Li / Yumu Zhang / Chongzhao You / Xuekui Yu / Yi Jiang / Yan ...Authors: Sijie Huang / Peiyu Xu / Dan-Dan Shen / Icaro A Simon / Chunyou Mao / Yangxia Tan / Huibing Zhang / Kasper Harpsøe / Huadong Li / Yumu Zhang / Chongzhao You / Xuekui Yu / Yi Jiang / Yan Zhang / David E Gloriam / H Eric Xu /
Abstract: Serotonin (or 5-hydroxytryptamine, 5-HT) is an important neurotransmitter that activates 12 different G protein-coupled receptors (GPCRs) through selective coupling of G, G or G proteins. The ...Serotonin (or 5-hydroxytryptamine, 5-HT) is an important neurotransmitter that activates 12 different G protein-coupled receptors (GPCRs) through selective coupling of G, G or G proteins. The structural basis for G protein subtype selectivity by these GPCRs remains elusive. Here, we report the structures of the serotonin receptors 5-HT, 5-HT, and 5-HT with G, and 5-HT with G. The structures reveal that transmembrane helices TM5 and TM6 alternate lengths as a macro-switch to determine receptor's selectivity for G and G, respectively. We find that the macro-switch by the TM5-TM6 length is shared by class A GPCR-G protein structures. Furthermore, we discover specific residues within TM5 and TM6 that function as micro-switches to form specific interactions with G or G. Together, these results present a common mechanism of G versus G protein coupling selectivity or promiscuity by class A GPCRs and extend the basis of ligand recognition at serotonin receptors.
History
DepositionMay 16, 2022-
Header (metadata) releaseJul 27, 2022-
Map releaseJul 27, 2022-
UpdateJul 3, 2024-
Current statusJul 3, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_33444.png

Downloads & links

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Map

FileDownload / File: emd_33444.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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AxesZ (Sec.)Y (Row.)X (Col.)
1.07 Å/pix.
x 200 pix.
= 214.2 Å		1.07 Å/pix.
x 200 pix.
= 214.2 Å		1.07 Å/pix.
x 200 pix.
= 214.2 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.071 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.04
Minimum - Maximum-0.022915978 - 1.7182639
Average (Standard dev.)0.0026956825 (±0.03391985)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 214.2 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_33444_half_map_1.map
Projections & Slices
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Half map: #1

Fileemd_33444_half_map_2.map
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Sample components

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Entire : Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex

EntireName: Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex
Components
  • Complex: Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: scFv16
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Soluble cytochrome b562,5-hydroxytryptamine receptor 4
  • Ligand: SEROTONIN

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Supramolecule #1: Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex

SupramoleculeName: Serotonin 4 (5-HT4) receptor-Gi-scFv16 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.414047 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGAQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHASM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCS TDTKNVQFVF DAVTDVIIKN NLKDCGLF

UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1

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Macromolecule #2: 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: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.915496 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: 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 WDSFLKIWN

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

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Macromolecule #3: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 26.597682 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MDVQLVESGG GLVQPGGSRK LSCSASGFAF SSFGMHWVRQ APEKGLEWVA YISSGSGTIY YADTVKGRFT ISRDDPKNTL FLQMTSLRS EDTAMYYCVR SIYYYGSSPF DFWGQGTTLT VSSGGGGSGG GGSGGGGSDI VMTQATSSVP VTPGESVSIS C RSSKSLLH ...String:
MDVQLVESGG GLVQPGGSRK LSCSASGFAF SSFGMHWVRQ APEKGLEWVA YISSGSGTIY YADTVKGRFT ISRDDPKNTL FLQMTSLRS EDTAMYYCVR SIYYYGSSPF DFWGQGTTLT VSSGGGGSGG GGSGGGGSDI VMTQATSSVP VTPGESVSIS C RSSKSLLH SNGNTYLYWF LQRPGQSPQL LIYRMSNLAS GVPDRFSGSG SGTAFTLTIS RLEAEDVGVY YCMQHLEYPL TF GAGTKLE LK

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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: 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 #5: Soluble cytochrome b562,5-hydroxytryptamine receptor 4

MacromoleculeName: Soluble cytochrome b562,5-hydroxytryptamine receptor 4
type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 59.525551 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: DYKDDDDAKL QTMHHHHHHH HHHADLEDNW ETLNDNLKVI EKADNAAQVK DALTKMRAAA LDAQKATPPK LEDKSPDSPE MKDFRHGFD ILVGQIDDAL KLANEGKVKE AQAAAEQLKT TRNAYIQKYL ASENLYFQGG TDKLDANVSS EEGFGSVEKV V LLTFLSTV ...String:
DYKDDDDAKL QTMHHHHHHH HHHADLEDNW ETLNDNLKVI EKADNAAQVK DALTKMRAAA LDAQKATPPK LEDKSPDSPE MKDFRHGFD ILVGQIDDAL KLANEGKVKE AQAAAEQLKT TRNAYIQKYL ASENLYFQGG TDKLDANVSS EEGFGSVEKV V LLTFLSTV ILMAILGNLL VMVAVCWDRQ LRKIKTNYFI VSLAFADLLV SVLVMPFGAI ELVQDIWIYG EVFCLVRTSL DV LLTTASI FHLCCISLDR YYAICCQPLV YRNKMTPLRI ALMLGGCWVI PTFISFLPIM QGWNNIGIID LIEKRKFNQN SNS TYCVFM VNKPYAITCS VVAFYIPFLL MVLAYYRIYV TAKEHAHQIQ MLQRAGASSE SRPQSADQHS THRMRTETKA AKTL CIIMG CFCLCWAPFF VTNIVDPFID YTVPGQVWTA FLWLGYINSG LNPFLYAFLN KSFRRAFLII LCCDDERYRR PSILG QTVP CSTTTINGST HVLRDAVECG GQWESQCHPP ATSPLVAAQP SDT

UniProtKB: Soluble cytochrome b562, 5-hydroxytryptamine receptor 4

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Macromolecule #6: SEROTONIN

MacromoleculeName: SEROTONIN / type: ligand / ID: 6 / Number of copies: 1 / Formula: SRO
Molecular weightTheoretical: 176.215 Da
Chemical component information

ChemComp-SRO:
SEROTONIN

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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 TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / 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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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 611883
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: MAXIMUM LIKELIHOOD

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