[English] 日本語
![](img/lk-miru.gif)
- EMDB-14076: Cryo-EM structure of human full-length synaptic alpha1beta3gamma2... -
+
Open data
-
Basic information
Entry | ![]() | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Title | Cryo-EM structure of human full-length synaptic alpha1beta3gamma2 GABA(A)R in complex with Ro15-4513 and megabody Mb38 | ||||||||||||||||||
![]() | |||||||||||||||||||
![]() |
| ||||||||||||||||||
Function / homology | ![]() cellular response to histamine / GABA receptor activation / GABA-gated chloride ion channel activity / GABA-A receptor activity / GABA-A receptor complex / inhibitory synapse assembly / synaptic transmission, GABAergic / gamma-aminobutyric acid signaling pathway / nervous system process / chloride transport ...cellular response to histamine / GABA receptor activation / GABA-gated chloride ion channel activity / GABA-A receptor activity / GABA-A receptor complex / inhibitory synapse assembly / synaptic transmission, GABAergic / gamma-aminobutyric acid signaling pathway / nervous system process / chloride transport / extracellular ligand-gated monoatomic ion channel activity / neurotransmitter receptor activity / chloride channel activity / roof of mouth development / Signaling by ERBB4 / chloride channel complex / transmembrane transporter complex / chloride transmembrane transport / regulation of membrane potential / cytoplasmic vesicle membrane / postsynaptic membrane / neuron projection / synapse / signal transduction / identical protein binding / plasma membrane Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.7 Å | ||||||||||||||||||
![]() | Sente A / Desai R / Naydenova K / Malinauskas T / Jounaidi Y / Miehling J / Zhou X / Masiulis S / Hardwick SW / Chirgadze DY ...Sente A / Desai R / Naydenova K / Malinauskas T / Jounaidi Y / Miehling J / Zhou X / Masiulis S / Hardwick SW / Chirgadze DY / Miller KW / Aricescu AR | ||||||||||||||||||
Funding support | ![]()
| ||||||||||||||||||
![]() | ![]() Title: 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. | ||||||||||||||||||
History |
|
-
Structure visualization
Supplemental images |
---|
-
Downloads & links
-EMDB archive
Map data | ![]() | 4.5 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 21 KB 21 KB | Display Display | ![]() |
Images | ![]() | 56.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 343.6 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 343.1 KB | Display | |
Data in XML | ![]() | 6.3 KB | Display | |
Data in CIF | ![]() | 7.1 KB | Display | |
Arichive directory | ![]() ![]() | 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 ( |
---|---|
Similar structure data | Similarity search - Function & homology ![]() |
EM raw data | ![]() Data 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]) |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.896 Å | ||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
|
-Supplemental data
-
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 |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.6 Component:
| |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 287 K / Instrument: LEICA PLUNGER |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
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: ![]() |
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 |
+
Image processing
-Atomic model buiding 1
Refinement | Protocol: AB INITIO MODEL |
---|---|
Output model | ![]() PDB-7qne: |