Cryo-EM structure of human full-length extrasynaptic alpha4beta3delta GABA(A)R in complex with GABA, histamine and nanobody Nb25
External Resource: Annotation
- Domain Annotation: ECOD Classification
- Domain Annotation: CATH
- SAbDab Antibody Annotation
- Protein Family Annotation
- Gene Ontology: Gene Product Annotation
- InterPro: Protein Family Classification
- Pharos: Disease Associations
- Membrane Protein Annotation: OPM
- Membrane Protein Annotation: PDBTM
- Membrane Protein Annotation: MemProtMD
- Membrane Protein Annotation: mpstruc
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| A | Neur_chan_LBD | e7qn7A1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Nicotinic receptor ligand binding domain-like (From Topology) | T: Nicotinic receptor ligand binding domain-like | F: Neur_chan_LBD | ECOD (1.6) |
| A | Neur_chan_memb | e7qn7A2 | A: alpha bundles | X: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | H: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | T: Neurotransmitter-gated ion-channel transmembrane pore | F: Neur_chan_memb | ECOD (1.6) |
| F | V-set_12 | e7qn7F1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_12 | ECOD (1.6) |
| G | V-set_12 | e7qn7G1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: V-set_12 | ECOD (1.6) |
| E | Neur_chan_LBD | e7qn7E2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Nicotinic receptor ligand binding domain-like (From Topology) | T: Nicotinic receptor ligand binding domain-like | F: Neur_chan_LBD | ECOD (1.6) |
| E | Neur_chan_memb | e7qn7E1 | A: alpha bundles | X: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | H: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | T: Neurotransmitter-gated ion-channel transmembrane pore | F: Neur_chan_memb | ECOD (1.6) |
| B | Neur_chan_LBD | e7qn7B2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Nicotinic receptor ligand binding domain-like (From Topology) | T: Nicotinic receptor ligand binding domain-like | F: Neur_chan_LBD | ECOD (1.6) |
| B | Neur_chan_memb | e7qn7B1 | A: alpha bundles | X: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | H: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | T: Neurotransmitter-gated ion-channel transmembrane pore | F: Neur_chan_memb | ECOD (1.6) |
| D | Neur_chan_LBD | e7qn7D2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Nicotinic receptor ligand binding domain-like (From Topology) | T: Nicotinic receptor ligand binding domain-like | F: Neur_chan_LBD | ECOD (1.6) |
| D | Neur_chan_memb | e7qn7D1 | A: alpha bundles | X: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | H: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | T: Neurotransmitter-gated ion-channel transmembrane pore | F: Neur_chan_memb | ECOD (1.6) |
| C | Neur_chan_LBD | e7qn7C2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Nicotinic receptor ligand binding domain-like (From Topology) | T: Nicotinic receptor ligand binding domain-like | F: Neur_chan_LBD | ECOD (1.6) |
| C | Neur_chan_memb | e7qn7C1 | A: alpha bundles | X: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | H: Neurotransmitter-gated ion-channel transmembrane pore (From Topology) | T: Neurotransmitter-gated ion-channel transmembrane pore | F: Neur_chan_memb | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| F | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (utative) |
| G | 2.60.40.10 | Mainly Beta | Sandwich | Immunoglobulin-like | Immunoglobulins | CATH (utative) |
SAbDab Antibody Annotation SAbDab Database Homepage
| Chain | Chain Class | Chain Subclass | Chain Type | Antigen Name(s) | Provenance Source |
|---|---|---|---|---|---|
| Heavy Chain | IGHV1 | - | gamma-aminobutyric acid receptor subunit beta-3 | SAbDab (2025-11-28) |
Protein Family Annotation Pfam Database Homepage
| Chains | Accession | Name | Description | Comments | Source |
|---|---|---|---|---|---|
| PF02932 | Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb) | Neurotransmitter-gated ion-channel transmembrane region | - | Family | |
| PF02931 | Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD) | Neurotransmitter-gated ion-channel ligand binding domain | - | Family | |
| PF02932 | Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb) | Neurotransmitter-gated ion-channel transmembrane region | - | Family | |
| PF02931 | Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD) | Neurotransmitter-gated ion-channel ligand binding domain | - | Family | |
| PF02932 | Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb) | Neurotransmitter-gated ion-channel transmembrane region | - | Family | |
| PF02931 | Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD) | Neurotransmitter-gated ion-channel ligand binding domain | - | Family |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Pharos: Disease Associations Pharos Homepage Annotation
Membrane Protein Annotation: OPM OPM Database Homepage
| Chains | External Link | Type | Class | Superfamily | Family |
|---|---|---|---|---|---|
| OPM | Transmembrane | Alpha-helical polytopic | Pentameric ligand-gated ion channels | Ligand-gated ion channel of neurotransmitter receptors |
Membrane Protein Annotation: PDBTM PDBTM Database Homepage
Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage
Membrane Protein Annotation: mpstruc mpstruc Database Homepage
| Chains | Resource Link | Group | Subgroup | Protein |
|---|---|---|---|---|
| mpstruc | TRANSMEMBRANE PROTEINS: ALPHA-HELICAL | Cys-Loop Receptor Family | GABAA receptor (α4β3δ), apo |














