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- PDB-6x3w: Human GABAA receptor alpha1-beta2-gamma2 subtype in complex with ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 6x3w | ||||||||||||||||||
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Title | Human GABAA receptor alpha1-beta2-gamma2 subtype in complex with GABA plus phenobarbital | ||||||||||||||||||
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![]() | MEMBRANE PROTEIN / Ion channel / Cys-loop receptor / pentametic ligand gated channel / GABAA receptor | ||||||||||||||||||
Function / homology | ![]() benzodiazepine receptor activity / GABA receptor complex / cellular response to histamine / GABA receptor activation / inner ear receptor cell development / GABA-A receptor activity / GABA-gated chloride ion channel activity / GABA-A receptor complex / inhibitory synapse assembly / innervation ...benzodiazepine receptor activity / GABA receptor complex / cellular response to histamine / GABA receptor activation / inner ear receptor cell development / GABA-A receptor activity / GABA-gated chloride ion channel activity / GABA-A receptor complex / inhibitory synapse assembly / innervation / synaptic transmission, GABAergic / gamma-aminobutyric acid signaling pathway / postsynaptic specialization membrane / neurotransmitter receptor activity / adult behavior / cochlea development / chloride channel activity / Signaling by ERBB4 / chloride channel complex / transmembrane transporter complex / GABA-ergic synapse / regulation of postsynaptic membrane potential / chloride transmembrane transport / dendrite membrane / post-embryonic development / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / cytoplasmic vesicle membrane / chemical synaptic transmission / postsynapse / neuron projection / axon / synapse / extracellular exosome / plasma membrane Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||||||||||||||
![]() | Kim, J.J. / Gharpure, A. / Teng, J. / Zhuang, Y. / Howard, R.J. / Zhu, S. / Noviello, C.M. / Walsh, R.M. / Lindahl, E. / Hibbs, R.E. | ||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Shared structural mechanisms of general anaesthetics and benzodiazepines. Authors: Jeong Joo Kim / Anant Gharpure / Jinfeng Teng / Yuxuan Zhuang / Rebecca J Howard / Shaotong Zhu / Colleen M Noviello / Richard M Walsh / Erik Lindahl / Ryan E Hibbs / ![]() ![]() Abstract: Most general anaesthetics and classical benzodiazepine drugs act through positive modulation of γ-aminobutyric acid type A (GABA) receptors to dampen neuronal activity in the brain. However, direct ...Most general anaesthetics and classical benzodiazepine drugs act through positive modulation of γ-aminobutyric acid type A (GABA) receptors to dampen neuronal activity in the brain. However, direct structural information on the mechanisms of general anaesthetics at their physiological receptor sites is lacking. Here we present cryo-electron microscopy structures of GABA receptors bound to intravenous anaesthetics, benzodiazepines and inhibitory modulators. These structures were solved in a lipidic environment and are complemented by electrophysiology and molecular dynamics simulations. Structures of GABA receptors in complex with the anaesthetics phenobarbital, etomidate and propofol reveal both distinct and common transmembrane binding sites, which are shared in part by the benzodiazepine drug diazepam. Structures in which GABA receptors are bound by benzodiazepine-site ligands identify an additional membrane binding site for diazepam and suggest an allosteric mechanism for anaesthetic reversal by flumazenil. This study provides a foundation for understanding how pharmacologically diverse and clinically essential drugs act through overlapping and distinct mechanisms to potentiate inhibitory signalling in the brain. | ||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 406.7 KB | Display | ![]() |
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PDB format | ![]() | 321.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 22035MC ![]() 6x3sC ![]() 6x3tC ![]() 6x3uC ![]() 6x3vC ![]() 6x3xC ![]() 6x3zC ![]() 6x40C M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Gamma-aminobutyric acid receptor subunit ... , 3 types, 5 molecules ACBDE
#1: Protein | Mass: 41810.086 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Protein | Mass: 41061.211 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Protein | | Mass: 47673.109 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Antibody , 2 types, 4 molecules ILJK
#4: Antibody | Mass: 23505.943 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #5: Antibody | Mass: 49811.043 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-Sugars , 4 types, 7 molecules ![](data/chem/img/NAG.gif)
#6: Polysaccharide | Source method: isolated from a genetically manipulated source #7: Polysaccharide | alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[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 | Source method: isolated from a genetically manipulated source #8: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #9: Sugar | |
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-Non-polymers , 2 types, 4 molecules ![](data/chem/img/ABU.gif)
![](data/chem/img/UQA.gif)
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#10: Chemical | #11: Chemical | |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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Molecular weight |
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Source (natural) |
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Source (recombinant) | Organism: ![]() | ||||||||||||||||||||||||||||
Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 8 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3 | ||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K / Details: 3.5 second blot |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 69.59 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of real images: 6682 |
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Processing
Software | Name: PHENIX / Version: 1.16_3549: / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1076196 | ||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 145958 / Algorithm: BACK PROJECTION / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL / Space: REAL | ||||||||||||||||||||||||||||||||||||||||
Refinement | Highest resolution: 3.3 Å | ||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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