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Yorodumi- EMDB-14076: Cryo-EM structure of human full-length synaptic alpha1beta3gamma2... -
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Basic information
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| Title | Cryo-EM structure of human full-length synaptic alpha1beta3gamma2 GABA(A)R in complex with Ro15-4513 and megabody Mb38 | ||||||||||||||||||
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Keywords | pentameric ligand-gated ion channel / neurotransmitter receptor / GABA receptor / MEMBRANE PROTEIN | ||||||||||||||||||
| Function / homology | Function and homology informationcircadian 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 / chloride channel activity / exploration behavior / motor behavior / roof of mouth development / Signaling by ERBB4 / cochlea development / social behavior / chloride channel complex / extracellular ligand-gated monoatomic ion channel activity / 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 | ||||||||||||||||||
| Biological species | Homo sapiens (human) / ![]() | ||||||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.7 Å | ||||||||||||||||||
Authors | Sente A / Desai R | ||||||||||||||||||
| Funding support | United Kingdom, 5 items
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Citation | Journal: Nature / Year: 2022Title: Differential assembly diversifies GABA receptor structures and signalling. Authors: Andrija Sente / Rooma Desai / Katerina Naydenova / Tomas Malinauskas / Youssef Jounaidi / Jonas Miehling / Xiaojuan Zhou / Simonas Masiulis / Steven W Hardwick / Dimitri Y Chirgadze / Keith ...Authors: Andrija Sente / Rooma Desai / Katerina Naydenova / Tomas Malinauskas / Youssef Jounaidi / Jonas Miehling / Xiaojuan Zhou / Simonas Masiulis / Steven W Hardwick / Dimitri Y Chirgadze / Keith W Miller / A Radu Aricescu / ![]() Abstract: Type A γ-aminobutyric acid receptors (GABARs) are pentameric ligand-gated chloride channels that mediate fast inhibitory signalling in neural circuits and can be modulated by essential medicines ...Type A γ-aminobutyric acid receptors (GABARs) are pentameric ligand-gated chloride channels that mediate fast inhibitory signalling in neural circuits and can be modulated by essential medicines including general anaesthetics and benzodiazepines. Human GABAR subunits are encoded by 19 paralogous genes that can, in theory, give rise to 495,235 receptor types. However, the principles that govern the formation of pentamers, the permutational landscape of receptors that may emerge from a subunit set and the effect that this has on GABAergic signalling remain largely unknown. Here we use cryogenic electron microscopy to determine the structures of extrasynaptic GABARs assembled from α4, β3 and δ subunits, and their counterparts incorporating γ2 instead of δ subunits. In each case, we identified two receptor subtypes with distinct stoichiometries and arrangements, all four differing from those previously observed for synaptic, α1-containing receptors. This, in turn, affects receptor responses to physiological and synthetic modulators by creating or eliminating ligand-binding sites at subunit interfaces. We provide structural and functional evidence that selected GABAR arrangements can act as coincidence detectors, simultaneously responding to two neurotransmitters: GABA and histamine. Using assembly simulations and single-cell RNA sequencing data, we calculated the upper bounds for receptor diversity in recombinant systems and in vivo. We propose that differential assembly is a pervasive mechanism for regulating the physiology and pharmacology of GABARs. | ||||||||||||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_14076.map.gz | 4.5 MB | EMDB map data format | |
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| Header (meta data) | emd-14076-v30.xml emd-14076.xml | 19.9 KB 19.9 KB | Display Display | EMDB header |
| Images | emd_14076.png | 56.1 KB | ||
| Filedesc metadata | emd-14076.cif.gz | 7.4 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-14076 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-14076 | HTTPS FTP |
-Validation report
| Summary document | emd_14076_validation.pdf.gz | 382.4 KB | Display | EMDB validaton report |
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| Full document | emd_14076_full_validation.pdf.gz | 382 KB | Display | |
| Data in XML | emd_14076_validation.xml.gz | 6.3 KB | Display | |
| Data in CIF | emd_14076_validation.cif.gz | 7.2 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-14076 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-14076 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7qneMC ![]() 7qn5C ![]() 7qn6C ![]() 7qn7C ![]() 7qn8C ![]() 7qn9C ![]() 7qnaC ![]() 7qnbC ![]() 7qncC ![]() 7qndC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
| EM raw data | EMPIAR-10912 (Title: Cryo-EM micrographs of GABA(A)Rs purified from cells expressing human full-length alpha1, beta3 and gamma subunits, in presence of Ro15-4513 and megabody Mb38Data size: 1.4 TB Data #1: Unaligned multi-frame micrographs of GABA(A)Rs purified from cells expressing human full-length alpha1, beta3 and gamma subunits, in presence of Ro15-4513 and megabody Mb38 [micrographs - multiframe]) |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_14076.map.gz / Format: CCP4 / Size: 93 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.896 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Human full-length synaptic alpha1beta3gamma2 GABA(A)R in complex ...
+Supramolecule #1: Human full-length synaptic alpha1beta3gamma2 GABA(A)R in complex ...
+Macromolecule #1: GABA(A) receptor subunit alpha-1
+Macromolecule #2: Gamma-aminobutyric acid receptor subunit beta-3
+Macromolecule #3: GABA(A) receptor subunit gamma-2
+Macromolecule #4: Megabody Mb38
+Macromolecule #9: [(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(o...
+Macromolecule #10: N-OCTANE
+Macromolecule #11: DECANE
+Macromolecule #12: CHLORIDE ION
+Macromolecule #13: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #14: ethyl 8-[(azanylidene-$l^{4}-azanylidene)amino]-5-methyl-6-oxidan...
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.6 Component:
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| Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 287 K / Instrument: LEICA PLUNGER |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 40.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.1 µm / Nominal defocus min: 0.7000000000000001 µm / Nominal magnification: 130000 |
| Sample stage | Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
| Refinement | Protocol: AB INITIO MODEL |
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| Output model | ![]() PDB-7qne: |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United Kingdom, 5 items
Citation























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FIELD EMISSION GUN
