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- PDB-8pvb: Structure of GABAAR determined by cryoEM at 100 keV -

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Basic information

Entry
Database: PDB / ID: 8pvb
TitleStructure of GABAAR determined by cryoEM at 100 keV
Components
  • Gamma-aminobutyric acid receptor subunit beta-3
  • Megabody Mb25
KeywordsMEMBRANE PROTEIN / Pentameric ligand-gated ion channel / Neurotrasmitter receptor / GABA(A) receptor
Function / homology
Function and homology information


circadian sleep/wake cycle, REM sleep / reproductive behavior / hard palate development / cellular response to histamine / GABA receptor activation / inner ear receptor cell development / inhibitory synapse assembly / GABA-A receptor activity / GABA-gated chloride ion channel activity / GABA-A receptor complex ...circadian sleep/wake cycle, REM sleep / reproductive behavior / hard palate development / cellular response to histamine / GABA receptor activation / inner ear receptor cell development / inhibitory synapse assembly / GABA-A receptor activity / GABA-gated chloride ion channel activity / GABA-A receptor complex / innervation / response to anesthetic / postsynaptic specialization membrane / inhibitory postsynaptic potential / gamma-aminobutyric acid signaling pathway / synaptic transmission, GABAergic / cellular response to zinc ion / exploration behavior / motor behavior / roof of mouth development / Signaling by ERBB4 / cochlea development / social behavior / chloride channel complex / cytoplasmic vesicle membrane / chloride transmembrane transport / cerebellum development / learning / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / GABA-ergic synapse / memory / dendritic spine / postsynaptic membrane / response to xenobiotic stimulus / cell surface / signal transduction / identical protein binding / plasma membrane
Similarity search - Function
Gamma-aminobutyric-acid A receptor, beta 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 ...Gamma-aminobutyric-acid A receptor, beta 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
DECANE / HISTAMINE / HEXADECANE / Etomidate / Gamma-aminobutyric acid receptor subunit beta-3
Similarity search - Component
Biological speciesHomo sapiens (human)
Lama glama (llama)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å
AuthorsMcMullan, G. / Naydenova, K. / Mihaylov, D. / Peet, M.J. / Wilson, H. / Yamashita, K. / Dickerson, J.L. / Chen, S. / Cannone, G. / Lee, Y. ...McMullan, G. / Naydenova, K. / Mihaylov, D. / Peet, M.J. / Wilson, H. / Yamashita, K. / Dickerson, J.L. / Chen, S. / Cannone, G. / Lee, Y. / Hutchings, K.A. / Gittins, O. / Sobhy, M. / Wells, T. / El-Gomati, M.M. / Dalby, J. / Meffert, M. / Schulze-Briese, C. / Henderson, R. / Russo, C.J.
Funding support United Kingdom, 6items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MC UP 120117 United Kingdom
Medical Research Council (MRC, United Kingdom)MC U105184322 United Kingdom
Wellcome Trust220526/B/20/Z United Kingdom
Engineering and Physical Sciences Research CouncilR122522 United Kingdom
Innovate UK103806 United Kingdom
Biotechnology and Biological Sciences Research Council (BBSRC)BB/T003677/1 United Kingdom
CitationJournal: Proc Natl Acad Sci U S A / Year: 2023
Title: Structure determination by cryoEM at 100 keV.
Authors: Greg McMullan / Katerina Naydenova / Daniel Mihaylov / Keitaro Yamashita / Mathew J Peet / Hugh Wilson / Joshua L Dickerson / Shaoxia Chen / Giuseppe Cannone / Yang Lee / Katherine A ...Authors: Greg McMullan / Katerina Naydenova / Daniel Mihaylov / Keitaro Yamashita / Mathew J Peet / Hugh Wilson / Joshua L Dickerson / Shaoxia Chen / Giuseppe Cannone / Yang Lee / Katherine A Hutchings / Olivia Gittins / Mohamed A Sobhy / Torquil Wells / Mohamed M El-Gomati / Jason Dalby / Matthias Meffert / Clemens Schulze-Briese / Richard Henderson / Christopher J Russo /
Abstract: Electron cryomicroscopy can, in principle, determine the structures of most biological molecules but is currently limited by access, specimen preparation difficulties, and cost. We describe a purpose- ...Electron cryomicroscopy can, in principle, determine the structures of most biological molecules but is currently limited by access, specimen preparation difficulties, and cost. We describe a purpose-built instrument operating at 100 keV-including advances in electron optics, detection, and processing-that makes structure determination fast and simple at a fraction of current costs. The instrument attains its theoretical performance limits, allowing atomic resolution imaging of gold test specimens and biological molecular structure determination in hours. We demonstrate its capabilities by determining the structures of eleven different specimens, ranging in size from 140 kDa to 2 MDa, using a fraction of the data normally required. CryoEM with a microscope designed specifically for high-efficiency, on-the-spot imaging of biological molecules will expand structural biology to a wide range of previously intractable problems.
History
DepositionJul 17, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Nov 29, 2023Provider: repository / Type: Initial release
Revision 1.1Dec 6, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Jan 31, 2024Group: Derived calculations / Structure summary / Category: chem_comp / entity / pdbx_entity_nonpoly
Item: _chem_comp.name / _entity.pdbx_description / _pdbx_entity_nonpoly.name
Revision 1.3Oct 9, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Gamma-aminobutyric acid receptor subunit beta-3
O: Megabody Mb25
hetero molecules


Theoretical massNumber of molelcules
Total (without water)104,60213
Polymers102,0452
Non-polymers2,55711
Water00
1
A: Gamma-aminobutyric acid receptor subunit beta-3
O: Megabody Mb25
hetero molecules
x 5


Theoretical massNumber of molelcules
Total (without water)523,01065
Polymers510,22510
Non-polymers12,78655
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation4
Noncrystallographic symmetry (NCS)NCS oper:
IDCodeMatrixVector
1given(1), (1), (1)
2generate(0.309016994, -0.951056516), (0.951056516, 0.309016994), (1)214.818178, -34.023857
3generate(-0.809016994, -0.587785252), (0.587785252, -0.809016994), (1)313.559257, 159.766421
4generate(-0.809016994, 0.587785252), (-0.587785252, -0.809016994), (1)159.766421, 313.559257
5generate(0.309016994, 0.951056516), (-0.951056516, 0.309016994), (1)-34.023857, 214.818178

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Components

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Protein / Antibody , 2 types, 2 molecules AO

#1: Protein Gamma-aminobutyric acid receptor subunit beta-3 / GABA(A) receptor subunit beta-3


Mass: 45744.285 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GABRB3 / Production host: Homo sapiens (human) / References: UniProt: P28472
#2: Antibody Megabody Mb25


Mass: 56300.629 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Lama glama (llama) / Production host: Escherichia coli (E. coli)

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Sugars , 2 types, 2 molecules

#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#4: Polysaccharide alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3/a4-b1_b4-c1_c3-d1_c6-e1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE

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Non-polymers , 5 types, 9 molecules

#5: Chemical ChemComp-R16 / HEXADECANE


Mass: 226.441 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C16H34
#6: Chemical
ChemComp-D10 / DECANE


Mass: 142.282 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C10H22
#7: Chemical ChemComp-HSM / HISTAMINE


Mass: 111.145 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C5H9N3
#8: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl
#9: Chemical ChemComp-V8D / Etomidate


Mass: 244.289 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C14H16N2O2

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Details

Has ligand of interestN
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human GABA(A)R-beta3 homopentamer in complex with Megabody-25 in lipid nanodisc
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightUnits: MEGADALTONS / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid type: UltrAuFoil R0./1
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: JEOL 1400/HR + YPS FEG
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 100 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 500 nm
Specimen holderCryogen: NITROGEN
Specimen holder model: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER
Image recordingElectron dose: 51 e/Å2 / Film or detector model: DECTRIS SINGLA (1k x 1k)
Image scansSampling size: 75 µm / Width: 1030 / Height: 1066

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Processing

EM softwareName: Servalcat / Version: 0.4.27 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C5 (5 fold cyclic)
3D reconstructionResolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 23477 / Symmetry type: POINT
Atomic model buildingSpace: RECIPROCAL
Atomic model buildingPDB-ID: 7a5v

7a5v


Accession code: 7a5v / Source name: PDB / Type: experimental model

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