Annotations: 7QNB

Cryo-EM structure of human full-length beta3gamma2 GABA(A)R in complex with GABA 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)
F [auth N]	WD40	e7qnbN1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: WD40	ECOD (v295.2)
E	WD40	e7qnbE1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: WD40	ECOD (v295.2)
D	WD40	e7qnbD1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: WD40	ECOD (v295.2)
B	WD40	e7qnbB1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: WD40	ECOD (v295.2)
C	WD40	e7qnbC1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: WD40	ECOD (v295.2)
A	WD40	e7qnbA1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: WD40	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth N]	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
F [auth N]	Heavy Chain	IGHV1	-	gamma-aminobutyric acid receptor subunit beta-3 \| gamma-aminobutyric acid receptor subunit beta-3	SAbDab (2026-10-16)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, D, E	PF02932	Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb)	Neurotransmitter-gated ion-channel transmembrane region	This family includes the four transmembrane helices that form the ion channel.	Domain
B, D, E	PF02931	Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD)	Neurotransmitter-gated ion-channel ligand binding domain	This family is the extracellular ligand binding domain of these ion channels [1]. This domain forms a pentameric arrangement in the known structure.	Domain
A, C	PF02932	Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb)	Neurotransmitter-gated ion-channel transmembrane region	This family includes the four transmembrane helices that form the ion channel.	Domain
A, C	PF02931	Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD)	Neurotransmitter-gated ion-channel ligand binding domain	This family is the extracellular ligand binding domain of these ion channels [1]. This domain forms a pentameric arrangement in the known structure.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
F [auth N]	Nanobody Nb25	-	-	-
B, D, E	Gamma-aminobutyric acid receptor subunit beta-3	protein binding binding signaling receptor binding transmitter-gated monoatomic ion channel activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity GABA-gated chloride ion channel activity molecular transducer activity gated channel activity monoatomic ion channel activity signaling receptor activity ligand-gated monoatomic anion channel activity neurotransmitter receptor activity ligand-gated channel activity protein binding binding signaling receptor binding transmitter-gated monoatomic ion channel activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity GABA-gated chloride ion channel activity molecular transducer activity gated channel activity monoatomic ion channel activity signaling receptor activity ligand-gated monoatomic anion channel activity neurotransmitter receptor activity ligand-gated channel activity ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity passive transmembrane transporter activity channel activity transmitter-gated channel activity monoatomic ion transmembrane transporter activity monoatomic anion channel activity transporter activity transmembrane transporter activity chloride channel activity GABA-A receptor activity GABA receptor activity transmembrane signaling receptor activity transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential identical protein binding	developmental process ear development sensory organ development inner ear development cochlea development anatomical structure development animal organ development animal gross anatomical part developmental process transport monoatomic ion transmembrane transport establishment of localization chloride transport transmembrane transport localization developmental process ear development sensory organ development inner ear development cochlea development anatomical structure development animal organ development animal gross anatomical part developmental process transport monoatomic ion transmembrane transport establishment of localization chloride transport transmembrane transport localization chloride transmembrane transport monoatomic anion transport monoatomic anion transmembrane transport monoatomic ion transport cellular process inorganic anion transport cellular response to nitrogen compound cellular response to stimulus cellular response to chemical stimulus response to histamine response to stimulus response to chemical cellular response to histamine response to nitrogen compound multicellular organismal process mechanoreceptor differentiation inner ear receptor cell development cellular developmental process cell development nervous system development inner ear receptor cell differentiation generation of neurons neurogenesis multicellular organism development neuron differentiation cell differentiation neuron development system development regulation of biological process signaling biological regulation cell-cell signaling gamma-aminobutyric acid signaling pathway cell communication regulation of cellular process signal transduction inhibitory synapse assembly cellular component organization cellular component biogenesis cell junction organization cellular component assembly cell junction assembly synapse organization cellular component organization or biogenesis synapse assembly regulation of postsynaptic membrane potential system process chemical synaptic transmission, postsynaptic synaptic signaling regulation of biological quality trans-synaptic signaling cell surface receptor signaling pathway nervous system process chemical synaptic transmission anterograde trans-synaptic signaling inhibitory postsynaptic potential regulation of membrane potential synaptic transmission, GABAergic sexual reproduction reproductive process cellular process involved in reproduction in multicellular organism developmental process involved in reproduction gamete generation chromatin organization chromatin remodeling regulation of biosynthetic process epigenetic programming of gene expression epigenetic regulation of gene expression multicellular organismal reproductive process regulation of macromolecule metabolic process gene expression genomic imprinting macromolecule biosynthetic process regulation of gene expression biosynthetic process germ cell development regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process nerve development innervation negative regulation of synaptic transmission, GABAergic negative regulation of signaling modulation of chemical synaptic transmission negative regulation of biological process negative regulation of synaptic transmission negative regulation of cell communication negative regulation of cellular process regulation of signaling regulation of trans-synaptic signaling regulation of cell communication regulation of synaptic transmission, GABAergic extrasynaptic signaling via GABA roof of mouth development	protein-containing complex cellular anatomical structure transmembrane transporter complex membrane chloride channel complex membrane protein complex transporter complex monoatomic ion channel complex cell periphery postsynapse postsynaptic membrane synapse cell junction plasma membrane protein-containing complex cellular anatomical structure transmembrane transporter complex membrane chloride channel complex membrane protein complex transporter complex monoatomic ion channel complex cell periphery postsynapse postsynaptic membrane synapse cell junction plasma membrane plasma membrane region synaptic membrane cell surface postsynaptic specialization membrane postsynaptic specialization organelle GABA receptor complex signaling receptor complex GABA-A receptor complex GABA-ergic synapse membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle membrane vesicle membrane cytoplasmic vesicle cytoplasm vesicle organelle membrane neuron spine neuron projection dendritic spine plasma membrane bounded cell projection somatodendritic compartment cell projection dendrite dendritic tree
A, C	Gamma-aminobutyric acid type A receptor subunit gamma2	ligand-gated channel activity ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity passive transmembrane transporter activity gated channel activity monoatomic ion channel activity channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity GABA-A receptor activity GABA receptor activity molecular transducer activity transmembrane signaling receptor activity ligand-gated channel activity ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity passive transmembrane transporter activity gated channel activity monoatomic ion channel activity channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity GABA-A receptor activity GABA receptor activity molecular transducer activity transmembrane signaling receptor activity signaling receptor activity	localization transport monoatomic anion transport monoatomic ion transport chloride transport establishment of localization inorganic anion transport regulation of biological process signaling biological regulation cell-cell signaling cellular process gamma-aminobutyric acid signaling pathway cell communication	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D, E	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
B, D, E	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
B, D, E	IPR006028	Gamma-aminobutyric acid A receptor/Glycine receptor alpha	Family
B, D, E	IPR002289	Gamma-aminobutyric-acid A receptor, beta subunit	Family
B, D, E	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
B, D, E	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
B, D, E	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
B, D, E	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
B, D, E	IPR006201	Neurotransmitter-gated ion-channel	Family
A, C	IPR005437	Gamma-aminobutyric acid receptor subunit gamma-1-4	Family
A, C	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
A, C	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
A, C	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
A, C	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
A, C	IPR006028	Gamma-aminobutyric acid A receptor/Glycine receptor alpha	Family
A, C	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
A, C	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
A, C	IPR006201	Neurotransmitter-gated ion-channel	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B, D, E	: P28472	Angelman syndrome epilepsy childhood absence epilepsy Lennox-Gastaut syndrome developmental and epileptic encephalopathy, 43 epilepsy, childhood absence, susceptibility to, 5 absence epilepsy autism insomnia autism spectrum disorder intellectual disability schizophrenia malignant ependymoma depressive disorder duplication/inversion 15q11 Angelman syndrome epilepsy childhood absence epilepsy Lennox-Gastaut syndrome developmental and epileptic encephalopathy, 43 epilepsy, childhood absence, susceptibility to, 5 absence epilepsy autism insomnia autism spectrum disorder intellectual disability schizophrenia malignant ependymoma depressive disorder duplication/inversion 15q11 status epilepticus pancreatic intraductal papillary-mucinous neoplasm astrocytic tumor pilocytic astrocytoma gastric carcinoma glioblastoma primitive neuroectodermal tumor bipolar disorder brain injury interstitial cystitis juvenile absence epilepsy malignant glioma Sjogren syndrome mixed anxiety and depressive disorder oligodendroglioma epilepsy with generalized tonic-clonic seizures pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia epilepsy, childhood absence, susceptibility to, 1 peptic ulcer disease pituitary cancer psoriasis schizoaffective disorder irritable bowel syndrome large cell medulloblastoma lung carcinoma Crohn disease medulloblastoma alcohol withdrawal delirium early myoclonic encephalopathy tetanus panic disorder atypical teratoid rhabdoid tumor Pick disease Prader-Willi syndrome generalized anxiety disorder

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D, E	OPM	Transmembrane	Alpha-helical polytopic	Pentameric ligand-gated ion channels	Ligand-gated ion channel of neurotransmitter receptors

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D, E	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D, E	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Cys-Loop Receptor Family	GABA_A receptor (α4β3δ), apo