6I53 | pdb_00006i53

Cryo-EM structure of the human synaptic alpha1-beta3-gamma2 GABAA receptor in complex with Megabody38 in a lipid nanodisc

External Resource: Annotation

Domain Annotation: ECOD Classification
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	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth G]	e6i53G1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T:	F:	ECOD (20:10:01)
D [auth C]	e6i53C1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: Mannosidase_ig	F:	ECOD (20:10:01)
B [auth A]	e6i53A1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T:	F:	ECOD (20:10:01)
E [auth D]	e6i53D1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: Mannosidase_ig	F:	ECOD (20:10:01)
C [auth B]	e6i53B1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T:	F:	ECOD (20:10:01)
A [auth E]	e6i53E1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: Mannosidase_ig	F:	ECOD (20:10:01)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
F [auth G]	Heavy Chain	IGHV1	-	gamma-aminobutyric acid receptor subunit alpha-1 \| gamma-aminobutyric acid receptor subunit beta-3	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D [auth C]	PF02932	Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb)	Neurotransmitter-gated ion-channel transmembrane region	-	Family
D [auth C]	PF02931	Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD)	Neurotransmitter-gated ion-channel ligand binding domain	-	Family
B [auth A], E [auth D]	PF02932	Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb)	Neurotransmitter-gated ion-channel transmembrane region	-	Family
B [auth A], E [auth D]	PF02931	Neurotransmitter-gated ion-channel ligand binding domain (Neur_chan_LBD)	Neurotransmitter-gated ion-channel ligand binding domain	-	Family
A [auth E], C [auth B]	PF02932	Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb)	Neurotransmitter-gated ion-channel transmembrane region	-	Family
A [auth E], C [auth B]	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

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
F [auth G]	Megabody38	-	-	-
D [auth C]	Gamma-aminobutyric acid receptor subunit gamma-2	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 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 benzodiazepine receptor 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	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 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 behavior adult behavior multicellular organismal process regulation of biological process signaling biological regulation cell-cell signaling gamma-aminobutyric acid signaling pathway cell communication developmental process inhibitory synapse assembly nervous system development cellular component organization cellular component biogenesis multicellular organism development cell junction organization cellular component assembly cell junction assembly anatomical structure development synapse organization cellular component organization or biogenesis synapse assembly system development trans-synaptic signaling synaptic transmission, GABAergic chemical synaptic transmission synaptic signaling anterograde trans-synaptic signaling post-embryonic 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 postsynaptic specialization membrane postsynaptic specialization organelle GABA receptor complex GABA-A receptor complex 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 cell leading edge neuron projection leading edge membrane plasma membrane bounded cell projection somatodendritic compartment neuron projection membrane cell projection dendrite membrane dendrite dendritic tree cell projection membrane neuron spine dendritic spine axon
B [auth A], E [auth D]	Gamma-aminobutyric acid receptor subunit alpha-1	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 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	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 regulation of biological process signaling 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 regulation of biological process signaling biological regulation cell-cell signaling gamma-aminobutyric acid signaling pathway cell communication developmental process multicellular organismal process inhibitory synapse assembly nervous system development cellular component organization cellular component biogenesis multicellular organism development cell junction organization cellular component assembly cell junction assembly anatomical structure development synapse organization cellular component organization or biogenesis synapse assembly system development trans-synaptic signaling synaptic transmission, GABAergic chemical synaptic transmission synaptic signaling anterograde trans-synaptic signaling	protein-containing complex cellular anatomical structure transmembrane transporter complex membrane chloride channel complex membrane protein complex transporter complex monoatomic ion channel complex GABA receptor complex receptor complex cell periphery plasma membrane postsynaptic specialization membrane postsynaptic specialization protein-containing complex cellular anatomical structure transmembrane transporter complex membrane chloride channel complex membrane protein complex transporter complex monoatomic ion channel complex GABA receptor complex receptor complex cell periphery plasma membrane postsynaptic specialization membrane postsynaptic specialization synapse synaptic membrane postsynapse organelle postsynaptic membrane cell junction plasma membrane region 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 cell leading edge neuron projection leading edge membrane plasma membrane bounded cell projection somatodendritic compartment neuron projection membrane cell projection dendrite membrane dendrite dendritic tree cell projection membrane neuron spine dendritic spine
A [auth E], C [auth B]	Gamma-aminobutyric acid receptor subunit beta-3	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 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 protein binding binding	developmental process ear development sensory organ development inner ear development cochlea development animal organ development anatomical structure development response to stimulus response to chemical response to xenobiotic stimulus behavior multicellular organismal process system process learning developmental process ear development sensory organ development inner ear development cochlea development animal organ development anatomical structure development response to stimulus response to chemical response to xenobiotic stimulus behavior multicellular organismal process system process learning learning or memory nervous system process cognition exploration behavior 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 cellular response to histamine response to nitrogen compound circadian sleep/wake cycle, sleep rhythmic process circadian sleep/wake cycle rhythmic behavior circadian rhythm circadian behavior circadian sleep/wake cycle, REM sleep sleep circadian sleep/wake cycle process hard palate development secondary palate development roof of mouth development 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 memory head development brain development cerebellum development central nervous system development metencephalon development hindbrain development response to anesthetic regulation of cellular process signal transduction reproductive process multicellular organismal reproductive process reproductive behavior 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 cellular response to metal ion response to metal ion response to zinc ion cellular response to zinc ion regulation of postsynaptic membrane potential chemical synaptic transmission, postsynaptic synaptic signaling regulation of biological quality trans-synaptic signaling cell surface receptor signaling pathway chemical synaptic transmission anterograde trans-synaptic signaling inhibitory postsynaptic potential regulation of membrane potential biological process involved in intraspecies interaction between organisms social behavior motor behavior synaptic transmission, GABAergic nerve development innervation	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 GABA-A receptor complex 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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth C]	IPR005437	Gamma-aminobutyric acid receptor subunit gamma-1/4	Family
D [auth C]	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
D [auth C]	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
D [auth C]	IPR006028	Gamma-aminobutyric acid A receptor/Glycine receptor alpha	Family
D [auth C]	IPR005439	Gamma-aminobutyric-acid A receptor, gamma 2 subunit	Family
D [auth C]	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
D [auth C]	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
D [auth C]	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
D [auth C]	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
D [auth C]	IPR006201	Neurotransmitter-gated ion-channel	Family
B [auth A], E [auth D]	IPR001390	Gamma-aminobutyric-acid A receptor, alpha subunit	Family
B [auth A], E [auth D]	IPR005431	Gamma-aminobutyric-acid A receptor, alpha 1 subunit	Family
B [auth A], E [auth D]	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
B [auth A], E [auth D]	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
B [auth A], E [auth D]	IPR006028	Gamma-aminobutyric acid A receptor/Glycine receptor alpha	Family
B [auth A], E [auth D]	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
B [auth A], E [auth D]	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
B [auth A], E [auth D]	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
B [auth A], E [auth D]	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
B [auth A], E [auth D]	IPR047024	Gamma-aminobutyric acid receptor subunit alpha 1-6, transmembrane domain	Domain
B [auth A], E [auth D]	IPR047079	Gamma-aminobutyric acid receptor subunit alpha-1, extracellular domain	Domain
B [auth A], E [auth D]	IPR006201	Neurotransmitter-gated ion-channel	Family
A [auth E], C [auth B]	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
A [auth E], C [auth B]	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
A [auth E], C [auth B]	IPR006028	Gamma-aminobutyric acid A receptor/Glycine receptor alpha	Family
A [auth E], C [auth B]	IPR002289	Gamma-aminobutyric-acid A receptor, beta subunit	Family
A [auth E], C [auth B]	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
A [auth E], C [auth B]	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
A [auth E], C [auth B]	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
A [auth E], C [auth B]	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
A [auth E], C [auth B]	IPR006201	Neurotransmitter-gated ion-channel	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth C]	Pharos: P18507	childhood absence epilepsy febrile seizures, familial, 8 hepatic encephalopathy epilepsy juvenile absence epilepsy cocaine dependence absence epilepsy generalized epilepsy with febrile seizures plus hepatic coma early myoclonic encephalopathy cocaine abuse Dravet syndrome alcohol abuse amphetamine abuse rolandic epilepsy childhood absence epilepsy febrile seizures, familial, 8 hepatic encephalopathy epilepsy juvenile absence epilepsy cocaine dependence absence epilepsy generalized epilepsy with febrile seizures plus hepatic coma early myoclonic encephalopathy cocaine abuse Dravet syndrome alcohol abuse amphetamine abuse rolandic epilepsy insomnia status epilepticus developmental and epileptic encephalopathy, 6 malignant glioma tetanus mixed anxiety and depressive disorder pilocytic astrocytoma primitive neuroectodermal tumor schizophrenia atypical teratoid rhabdoid tumor intellectual disability large cell medulloblastoma lung carcinoma subependymal giant cell astrocytoma medulloblastoma epilepsy with generalized tonic-clonic seizures panic disorder alcohol withdrawal delirium peptic ulcer disease generalized epilepsy with febrile seizures plus, type 1 pseudotumor cerebri astrocytic tumor irritable bowel syndrome Lennox-Gastaut syndrome malignant ependymoma oligodendroglioma partial epilepsy Pick disease generalized anxiety disorder glioblastoma
B [auth A], E [auth D]	Pharos: P14867	developmental and epileptic encephalopathy, 19 juvenile myoclonic epilepsy hepatic encephalopathy essential tremor epilepsy childhood absence epilepsy epilepsy, idiopathic generalized, susceptibility to, 13 hepatic coma amyotrophic lateral sclerosis type 1 Ataxia pilocytic astrocytoma atypical teratoid rhabdoid tumor generalized anxiety disorder primitive neuroectodermal tumor bipolar disorder developmental and epileptic encephalopathy, 19 juvenile myoclonic epilepsy hepatic encephalopathy essential tremor epilepsy childhood absence epilepsy epilepsy, idiopathic generalized, susceptibility to, 13 hepatic coma amyotrophic lateral sclerosis type 1 Ataxia pilocytic astrocytoma atypical teratoid rhabdoid tumor generalized anxiety disorder primitive neuroectodermal tumor bipolar disorder irritable bowel syndrome Lennox-Gastaut syndrome malignant glioma Dravet syndrome mixed anxiety and depressive disorder EJM1 oligodendroglioma epilepsy with generalized tonic-clonic seizures anxiety disorder Parkinson disease peptic ulcer disease autism glioblastoma pseudotumor cerebri insomnia alcohol abuse status epilepticus developmental and epileptic encephalopathy, 6 medulloblastoma tetanus ovarian cyst astrocytic tumor partial epilepsy Pick disease schizophrenia intellectual disability corpus luteum cyst large cell medulloblastoma alcohol withdrawal delirium subependymal giant cell astrocytoma malignant ependymoma early myoclonic encephalopathy panic disorder
A [auth E], C [auth B]	Pharos: P28472	epilepsy Angelman syndrome 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 epilepsy Angelman syndrome 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 gastric carcinoma pilocytic astrocytoma glioblastoma primitive neuroectodermal tumor bipolar disorder interstitial cystitis brain injury juvenile absence epilepsy malignant glioma Sjogren syndrome mixed anxiety and depressive disorder epilepsy with generalized tonic-clonic seizures oligodendroglioma epilepsy, childhood absence, susceptibility to, 1 pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia peptic ulcer disease pituitary cancer psoriasis irritable bowel syndrome schizoaffective disorder large cell medulloblastoma lung carcinoma Crohn disease medulloblastoma alcohol withdrawal delirium early myoclonic encephalopathy tetanus panic disorder atypical teratoid rhabdoid tumor Pick disease generalized anxiety disorder Prader-Willi syndrome

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth E], B [auth A], C [auth B], D [auth C], E [auth D]	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 [auth E], B [auth A], C [auth B], D [auth C], E [auth D]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth E], B [auth A], C [auth B], D [auth C], E [auth D]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Cys-Loop Receptor Family	GABA_A receptor (α1β3γ2L) in nanodiscs