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- PDB-6plq: CryoEM structure of zebra fish alpha-1 glycine receptor YGF mutan... -

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Basic information

Entry
Database: PDB / ID: 6plq
TitleCryoEM structure of zebra fish alpha-1 glycine receptor YGF mutant bound with GABA in SMA, super-open state
ComponentsGlycine receptor subunit alphaZ1
KeywordsMEMBRANE PROTEIN / glycine receptor / SMA / CryoEM
Function / homology
Function and homology information


transmitter-gated monoatomic ion channel activity / Neurotransmitter receptors and postsynaptic signal transmission / extracellularly glycine-gated ion channel activity / extracellularly glycine-gated chloride channel activity / cellular response to ethanol / regulation of neuron differentiation / cellular response to zinc ion / neurotransmitter receptor activity / glycine binding / transmembrane transporter complex ...transmitter-gated monoatomic ion channel activity / Neurotransmitter receptors and postsynaptic signal transmission / extracellularly glycine-gated ion channel activity / extracellularly glycine-gated chloride channel activity / cellular response to ethanol / regulation of neuron differentiation / cellular response to zinc ion / neurotransmitter receptor activity / glycine binding / transmembrane transporter complex / ligand-gated monoatomic ion channel activity / chloride channel complex / response to amino acid / monoatomic ion transport / chloride transmembrane transport / central nervous system development / cellular response to amino acid stimulus / transmembrane signaling receptor activity / perikaryon / postsynaptic membrane / neuron projection / dendrite / synapse / zinc ion binding / membrane / plasma membrane
Similarity search - Function
Glycine receptor alpha1 / Glycine receptor alpha / Gamma-aminobutyric acid A receptor/Glycine receptor alpha / Neurotransmitter-gated ion-channel transmembrane domain / Neurotransmitter-gated ion-channel transmembrane region / Neurotransmitter-gated ion-channel, conserved site / Neurotransmitter-gated ion-channels signature. / Neurotransmitter-gated ion-channel transmembrane domain superfamily / Neuronal acetylcholine receptor / Neurotransmitter-gated ion-channel ...Glycine receptor alpha1 / Glycine receptor alpha / Gamma-aminobutyric acid A receptor/Glycine receptor alpha / Neurotransmitter-gated ion-channel transmembrane domain / Neurotransmitter-gated ion-channel transmembrane region / Neurotransmitter-gated ion-channel, conserved site / Neurotransmitter-gated ion-channels signature. / 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-AMINO-BUTANOIC ACID / Glycine receptor subunit alphaZ1
Similarity search - Component
Biological speciesDanio rerio (zebrafish)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsYu, J. / Zhu, H. / Gouaux, E.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM100400 United States
CitationJournal: Cell / Year: 2021
Title: Mechanism of gating and partial agonist action in the glycine receptor.
Authors: Jie Yu / Hongtao Zhu / Remigijus Lape / Timo Greiner / Juan Du / Wei Lü / Lucia Sivilotti / Eric Gouaux /
Abstract: Ligand-gated ion channels mediate signal transduction at chemical synapses and transition between resting, open, and desensitized states in response to neurotransmitter binding. Neurotransmitters ...Ligand-gated ion channels mediate signal transduction at chemical synapses and transition between resting, open, and desensitized states in response to neurotransmitter binding. Neurotransmitters that produce maximum open channel probabilities (Po) are full agonists, whereas those that yield lower than maximum Po are partial agonists. Cys-loop receptors are an important class of neurotransmitter receptors, yet a structure-based understanding of the mechanism of partial agonist action has proven elusive. Here, we study the glycine receptor with the full agonist glycine and the partial agonists taurine and γ-amino butyric acid (GABA). We use electrophysiology to show how partial agonists populate agonist-bound, closed channel states and cryo-EM reconstructions to illuminate the structures of intermediate, pre-open states, providing insights into previously unseen conformational states along the receptor reaction pathway. We further correlate agonist-induced conformational changes to Po across members of the receptor family, providing a hypothetical mechanism for partial and full agonist action at Cys-loop receptors.
History
DepositionJul 1, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 10, 2021Provider: repository / Type: Initial release
Revision 1.1Aug 25, 2021Group: Database references / Category: citation / citation_author / database_2
Item: _citation.journal_abbrev / _citation.journal_id_CSD ..._citation.journal_abbrev / _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 / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 2.0Nov 15, 2023Group: Atomic model / Data collection / Category: atom_site / chem_comp_atom / chem_comp_bond / Item: _atom_site.auth_atom_id / _atom_site.label_atom_id
Revision 2.1Nov 20, 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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Assembly

Deposited unit
A: Glycine receptor subunit alphaZ1
B: Glycine receptor subunit alphaZ1
C: Glycine receptor subunit alphaZ1
D: Glycine receptor subunit alphaZ1
E: Glycine receptor subunit alphaZ1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)266,13615
Polymers262,6885
Non-polymers3,44810
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Glycine receptor subunit alphaZ1


Mass: 52537.598 Da / Num. of mol.: 5
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Danio rerio (zebrafish) / Gene: glra1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: O93430
#2: Polysaccharide
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 5
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}}LINUCSPDB-CARE
#3: Chemical
ChemComp-ABU / GAMMA-AMINO-BUTANOIC ACID / GAMMA(AMINO)-BUTYRIC ACID


Mass: 103.120 Da / Num. of mol.: 5
Source method: isolated from a genetically manipulated source
Formula: C4H9NO2 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
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: glycine receptor in complex with GABA / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 250 kDa/nm / Experimental value: YES
Source (natural)Organism: Danio rerio (zebrafish)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Cs: 2.7 mm
Image recordingElectron dose: 28.2 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C5 (5 fold cyclic)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 42097 / Symmetry type: POINT

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