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- EMDB-19907: CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R... -

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Basic information

Entry
Database: EMDB / ID: EMD-19907
TitleCryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R in complex with GABA and puerarin
Map dataUnsharpened map from the refinement
Sample
  • Complex: CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R in complex with GABA and puerarin
    • Protein or peptide: x 3 types
  • Ligand: x 12 types
KeywordsGABA(A) receptor / Inhibitory synapse / GABA / Puerarin / Fat regulation / MEMBRANE PROTEIN
Function / homology
Function and homology information


benzodiazepine receptor activity / GABA receptor complex / cellular response to histamine / GABA receptor activation / GABA-A receptor activity / GABA-gated chloride ion channel activity / GABA-A receptor complex / inhibitory synapse assembly / synaptic transmission, GABAergic / gamma-aminobutyric acid signaling pathway ...benzodiazepine receptor activity / GABA receptor complex / cellular response to histamine / GABA receptor activation / GABA-A receptor activity / GABA-gated chloride ion channel activity / GABA-A receptor complex / inhibitory synapse assembly / synaptic transmission, GABAergic / gamma-aminobutyric acid signaling pathway / postsynaptic specialization membrane / neurotransmitter receptor activity / chloride channel activity / roof of mouth development / adult behavior / Signaling by ERBB4 / chloride channel complex / regulation of postsynaptic membrane potential / transmembrane transporter complex / GABA-ergic synapse / chloride transmembrane transport / dendrite membrane / post-embryonic development / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / cytoplasmic vesicle membrane / postsynaptic membrane / postsynapse / dendritic spine / neuron projection / axon / synapse / signal transduction / identical protein binding / plasma membrane
Similarity search - Function
Gamma-aminobutyric-acid A receptor, gamma 2 subunit / Gamma-aminobutyric acid receptor subunit gamma-1/4 / Gamma-aminobutyric-acid A receptor, alpha 1 subunit / : / Gamma-aminobutyric-acid A receptor, beta subunit / Gamma-aminobutyric-acid A receptor, alpha subunit / : / Gamma-aminobutyric acid A receptor/Glycine receptor alpha / Neurotransmitter-gated ion-channel, conserved site / Neurotransmitter-gated ion-channels signature. ...Gamma-aminobutyric-acid A receptor, gamma 2 subunit / Gamma-aminobutyric acid receptor subunit gamma-1/4 / Gamma-aminobutyric-acid A receptor, alpha 1 subunit / : / Gamma-aminobutyric-acid A receptor, beta subunit / Gamma-aminobutyric-acid A receptor, alpha subunit / : / Gamma-aminobutyric acid A receptor/Glycine receptor alpha / Neurotransmitter-gated ion-channel, conserved site / Neurotransmitter-gated ion-channels signature. / Neurotransmitter-gated ion-channel transmembrane domain / Neurotransmitter-gated ion-channel transmembrane region / Neurotransmitter-gated ion-channel transmembrane domain superfamily / Neuronal acetylcholine receptor / Neurotransmitter-gated ion-channel / Neurotransmitter-gated ion-channel ligand-binding domain / Neurotransmitter-gated ion-channel ligand-binding domain superfamily / Neurotransmitter-gated ion-channel ligand binding domain
Similarity search - Domain/homology
Gamma-aminobutyric acid receptor subunit alpha-1 / Gamma-aminobutyric acid receptor subunit gamma-2 / Gamma-aminobutyric acid receptor subunit beta-3
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.4 Å
AuthorsKasaragod VB / Aricescu AR
Funding support United Kingdom, European Union, 3 items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MC_UP_1201/15 United Kingdom
European Molecular Biology Organization (EMBO)ALTF137-2019European Union
H2020 Marie Curie Actions of the European CommissionGABAARComp-897707European Union
CitationJournal: Nature / Year: 2024
Title: A brain-to-gut signal controls intestinal fat absorption.
Authors: Qianqian Lyu / Wenzhi Xue / Ruixin Liu / Qinyun Ma / Vikram Babu Kasaragod / Shan Sun / Qian Li / Yanru Chen / Mingyang Yuan / Yuying Yang / Bing Zhang / Aifang Nie / Sheng Jia / Chongrong ...Authors: Qianqian Lyu / Wenzhi Xue / Ruixin Liu / Qinyun Ma / Vikram Babu Kasaragod / Shan Sun / Qian Li / Yanru Chen / Mingyang Yuan / Yuying Yang / Bing Zhang / Aifang Nie / Sheng Jia / Chongrong Shen / Po Gao / Weifang Rong / Chenxi Yu / Yufang Bi / Chunlei Zhang / Fajun Nan / Guang Ning / Zihe Rao / Xiuna Yang / Jiqiu Wang / Weiqing Wang /
Abstract: Although fat is a crucial source of energy in diets, excessive intake leads to obesity. Fat absorption in the gut is prevailingly thought to occur organ-autonomously by diffusion. Whether the ...Although fat is a crucial source of energy in diets, excessive intake leads to obesity. Fat absorption in the gut is prevailingly thought to occur organ-autonomously by diffusion. Whether the process is controlled by the brain-to-gut axis, however, remains largely unknown. Here we demonstrate that the dorsal motor nucleus of vagus (DMV) plays a key part in this process. Inactivation of DMV neurons reduces intestinal fat absorption and consequently causes weight loss, whereas activation of the DMV increases fat absorption and weight gain. Notably, the inactivation of a subpopulation of DMV neurons that project to the jejunum shortens the length of microvilli, thereby reducing fat absorption. Moreover, we identify a natural compound, puerarin, that mimics the suppression of the DMV-vagus pathway, which in turn leads to reduced fat absorption. Photoaffinity chemical methods and cryogenic electron microscopy of the structure of a GABA receptor-puerarin complex reveal that puerarin binds to an allosteric modulatory site. Notably, conditional Gabra1 knockout in the DMV largely abolishes puerarin-induced intestinal fat loss. In summary, we discover that suppression of the DMV-vagus-jejunum axis controls intestinal fat absorption by shortening the length of microvilli and illustrate the therapeutic potential of puerarin binding to GABRA1 in fat loss.
History
DepositionMar 21, 2024-
Header (metadata) releaseSep 18, 2024-
Map releaseSep 18, 2024-
UpdateNov 6, 2024-
Current statusNov 6, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_19907.png

Downloads & links

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Map

FileDownload / File: emd_19907.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationUnsharpened map from the refinement
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 512 pix.
= 421.888 Å		0.82 Å/pix.
x 512 pix.
= 421.888 Å		0.82 Å/pix.
x 512 pix.
= 421.888 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.824 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.12
Minimum - Maximum-0.43659177 - 1.1526906
Average (Standard dev.)0.00015341325 (±0.018993415)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions512512512
Spacing512512512
CellA=B=C: 421.888 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_19907_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R...

EntireName: CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R in complex with GABA and puerarin
Components
  • Complex: CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R in complex with GABA and puerarin
    • Protein or peptide: Gamma-aminobutyric acid receptor subunit alpha-1
    • Protein or peptide: Gamma-aminobutyric acid receptor subunit beta-3
    • Protein or peptide: Gamma-aminobutyric acid receptor subunit gamma-2
  • Ligand: (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate
  • Ligand: DECANE
  • Ligand: HEXANE
  • Ligand: [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoate
  • Ligand: HEXADECANE
  • Ligand: PALMITIC ACID
  • Ligand: CHLORIDE ION
  • Ligand: GAMMA-AMINO-BUTANOIC ACID
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: Puerarin
  • Ligand: 1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE
  • Ligand: water

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Supramolecule #1: CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R...

SupramoleculeName: CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R in complex with GABA and puerarin
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 250 KDa

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Macromolecule #1: Gamma-aminobutyric acid receptor subunit alpha-1

MacromoleculeName: Gamma-aminobutyric acid receptor subunit alpha-1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 52.916602 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MKKSPGLSDY LWAWTLFLST LTGRSYGDYK DDDDKQPSLQ DELKDNTTVF TRILDRLLDG YDNRLRPGLG ERVTEVKTDI FVTSFGPVS DHDMEYTIDV FFRQSWKDER LKFKGPMTVL RLNNLMASKI WTPDTFFHNG KKSVAHNMTM PNKLLRITED G TLLYTMRL ...String:
MKKSPGLSDY LWAWTLFLST LTGRSYGDYK DDDDKQPSLQ DELKDNTTVF TRILDRLLDG YDNRLRPGLG ERVTEVKTDI FVTSFGPVS DHDMEYTIDV FFRQSWKDER LKFKGPMTVL RLNNLMASKI WTPDTFFHNG KKSVAHNMTM PNKLLRITED G TLLYTMRL TVRAECPMHL EDFPMDAHAC PLKFGSYAYT RAEVVYEWTR EPARSVVVAE DGSRLNQYDL LGQTVDSGIV QS STGEYVV MTTHFHLKRK IGYFVIQTYL PCIMTVILSQ VSFWLNRESV PARTVFGVTT VLTMTTLSIS ARNSLPKVAY ATA MDWFIA VCYAFVFSAL IEFATVNYFT KRGYAWDGKS VVPEKPKKVK DPLIKKNNTY APTATSYTPN LARGDPGLAT IAKS ATIEP KEVKPETKPP EPKKTFNSVS KIDRLSRIAF PLLFGIFNLV YWATYLNREP QLKAPTPHQ

UniProtKB: Gamma-aminobutyric acid receptor subunit alpha-1

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Macromolecule #2: Gamma-aminobutyric acid receptor subunit beta-3

MacromoleculeName: Gamma-aminobutyric acid receptor subunit beta-3 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 54.180348 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MWGLAGGRLF GIFSAPVLVA VVCCAQSVND PGNMSFVKET VDKLLKGYDI RLRPDFGGPP VCVGMNIDIA SIDMVSEVNM DYTLTMYFQ QYWRDKRLAY SGIPLNLTLD NRVADQLWVP DTYFLNDKKS FVHGVTVKNR MIRLHPDGTV LYGLRITTTA A CMMDLRRY ...String:
MWGLAGGRLF GIFSAPVLVA VVCCAQSVND PGNMSFVKET VDKLLKGYDI RLRPDFGGPP VCVGMNIDIA SIDMVSEVNM DYTLTMYFQ QYWRDKRLAY SGIPLNLTLD NRVADQLWVP DTYFLNDKKS FVHGVTVKNR MIRLHPDGTV LYGLRITTTA A CMMDLRRY PLDEQNCTLE IESYGYTTDD IEFYWRGGDK AVTGVERIEL PQFSIVEHRL VSRNVVFATG AYPRLSLSFR LK RNIGYFI LQTYMPSILI TILSWVSFWI NYDASAARVA LGITTVLTMT TINTHLRETL PKIPYVKAID MYLMGCFVFV FLA LLEYAF VNYIFFGRGP QRQKKLAEKT AKAKNDRSKS ESNRVDAHGN ILLTSLEVHN EMNEVSGGIG DTRNSAISFD NSGI QYRKQ SMPREGHGRF LGDRSLPHKK THLRRRSSQL KIKIPDLTDV NAIDRWSRIV FPFTFSLFNL VYWLYYVN

UniProtKB: Gamma-aminobutyric acid receptor subunit beta-3

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Macromolecule #3: Gamma-aminobutyric acid receptor subunit gamma-2

MacromoleculeName: Gamma-aminobutyric acid receptor subunit gamma-2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 56.922055 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MSSPNIWSTG SSVYSTPVFS QKMTVWILLL LSLYPGFTSQ KSDDDYEDYA SNKTWVLTPK VPEGDVTVIL NNLLEGYDNK LRPDIGVKP TLIHTDMYVN SIGPVNAINM EYTIDIFFAQ TWYDRRLKFN STIKVLRLNS NMVGKIWIPD TFFRNSKKAD A HWITTPNR ...String:
MSSPNIWSTG SSVYSTPVFS QKMTVWILLL LSLYPGFTSQ KSDDDYEDYA SNKTWVLTPK VPEGDVTVIL NNLLEGYDNK LRPDIGVKP TLIHTDMYVN SIGPVNAINM EYTIDIFFAQ TWYDRRLKFN STIKVLRLNS NMVGKIWIPD TFFRNSKKAD A HWITTPNR MLRIWNDGRV LYTLRLTIDA ECQLQLHNFP MDEHSCPLEF SSYGYPREEI VYQWKRSSVE VGDTRSWRLY QF SFVGLRN TTEVVKTTSG DYVVMSVYFD LSRRMGYFTI QTYIPCTLIV VLSWVSFWIN KDAVPARTSL GITTVLTMTT LST IARKSL PKVSYVTAMD LFVSVCFIFV FSALVEYGTL HYFVSNRKPS KDKDKKKKNP LLRMFSFKAP TIDIRPRSAT IQMN NATHL QERDEEYGYE CLDGKDCASF FCCFEDCRTG AWRHGRIHIR IAKMDSYARI FFPTAFCLFN LVYWVSYLYL GGSGG SGGS GKTETSQVAP A

UniProtKB: Gamma-aminobutyric acid receptor subunit gamma-2

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Macromolecule #7: (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]o...

MacromoleculeName: (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate
type: ligand / ID: 7 / Number of copies: 2 / Formula: PGW
Molecular weightTheoretical: 749.007 Da

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Macromolecule #8: DECANE

MacromoleculeName: DECANE / type: ligand / ID: 8 / Number of copies: 11 / Formula: D10
Molecular weightTheoretical: 142.282 Da
Chemical component information

ChemComp-D10:
DECANE

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Macromolecule #9: HEXANE

MacromoleculeName: HEXANE / type: ligand / ID: 9 / Number of copies: 10 / Formula: HEX
Molecular weightTheoretical: 86.175 Da
Chemical component information

ChemComp-HEX:
HEXANE

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Macromolecule #10: [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tr...

MacromoleculeName: [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoate
type: ligand / ID: 10 / Number of copies: 2 / Formula: PT5
Molecular weightTheoretical: 1.047088 KDa

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Macromolecule #11: HEXADECANE

MacromoleculeName: HEXADECANE / type: ligand / ID: 11 / Number of copies: 5 / Formula: R16
Molecular weightTheoretical: 226.441 Da
Chemical component information

ChemComp-R16:
HEXADECANE

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Macromolecule #12: PALMITIC ACID

MacromoleculeName: PALMITIC ACID / type: ligand / ID: 12 / Number of copies: 3 / Formula: PLM
Molecular weightTheoretical: 256.424 Da
Chemical component information

ChemComp-PLM:
PALMITIC ACID

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Macromolecule #13: CHLORIDE ION

MacromoleculeName: CHLORIDE ION / type: ligand / ID: 13 / Number of copies: 3 / Formula: CL
Molecular weightTheoretical: 35.453 Da

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Macromolecule #14: GAMMA-AMINO-BUTANOIC ACID

MacromoleculeName: GAMMA-AMINO-BUTANOIC ACID / type: ligand / ID: 14 / Number of copies: 2 / Formula: ABU
Molecular weightTheoretical: 103.12 Da
Chemical component information

ChemComp-ABU:
GAMMA-AMINO-BUTANOIC ACID

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Macromolecule #15: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 15 / Number of copies: 1 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #16: Puerarin

MacromoleculeName: Puerarin / type: ligand / ID: 16 / Number of copies: 1 / Formula: A1H6W
Molecular weightTheoretical: 416.378 Da

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Macromolecule #17: 1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE

MacromoleculeName: 1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE / type: ligand / ID: 17 / Number of copies: 1 / Formula: PX2
Molecular weightTheoretical: 535.671 Da
Chemical component information

ChemComp-PX2:
1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE

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Macromolecule #18: water

MacromoleculeName: water / type: ligand / ID: 18 / Number of copies: 258 / 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

Concentration1.0 mg/mL
BufferpH: 7.4
Component:
ConcentrationFormulaName
15.0 mMHepes4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid
100.0 mMNaClsodium chloride

Details: 15 mM Hepes pH 7.4, 100 mM NaCl
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec. / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.039 kPa
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 287 K / Instrument: LEICA EM GP

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Electron microscopy

MicroscopeTFS KRIOS
TemperatureMin: 84.0 K / Max: 84.0 K
Image recordingFilm or detector model: TFS FALCON 4i (4k x 4k) / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number grids imaged: 1 / Number real images: 8747 / Average exposure time: 4.19 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 / Calibrated defocus max: 3.5 µm / Calibrated defocus min: 0.5 µm / Calibrated magnification: 96000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.4 µm / Nominal defocus min: 1.0 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: 1932720
Startup modelType of model: OTHER / Details: Ab-initio Reconstruction
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 2.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.40) / Number images used: 122065
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.40)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.40)
Final 3D classificationDetails: Not application
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

6hup


Chain - Source name: PDB / Chain - Initial model type: experimental model
DetailsReal space refinement with ADP correction.
RefinementSpace: REAL / Protocol: OTHER / Overall B value: 10 / Target criteria: FSC at 0.5
Output model

PDB-9eqg:
CryoEM structure of human full-length alpha1beta3gamma2L GABA(A)R in complex with GABA and puerarin

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