Annotations: 8ST3

The 2alpha3beta stoichiometry of human alpha4beta2 nicotinic acetylcholine receptor in complex with acetylcholine and calcium

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: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
K		e8st3K1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
I		e8st3I1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
G		e8st3G1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
J		e8st3J1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
H		e8st3H1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
F		e8st3F1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
E		e8st3E1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
C		e8st3C1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
B		e8st3B1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
D		e8st3D1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
A		e8st3A1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
G, I, K	Heavy Chain	IGHV1	-	neuronal acetylcholine receptor subunit beta-2, neuronal acetylcholine receptor subunit beta-2 \| neuronal acetylcholine receptor subunit alpha-4	SAbDab (2026-06-26)
F, H, J	Light Chain	IGKV1	Kappa	neuronal acetylcholine receptor subunit beta-2, neuronal acetylcholine receptor subunit beta-2 \| neuronal acetylcholine receptor subunit alpha-4	SAbDab (2026-06-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, C, 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, C, 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, D	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, D	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
G, I, K	IgG1 Heavy Chain	-	-	-
F, H, J	IgG1 Kappa Light Chain	-	-	-
B, C, E	Neuronal acetylcholine receptor subunit beta-2	ligand-gated channel activity 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 neurotransmitter receptor activity postsynaptic neurotransmitter receptor activity molecular transducer activity signaling receptor activity transmembrane signaling receptor activity ligand-gated channel activity 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 neurotransmitter receptor activity postsynaptic neurotransmitter receptor activity molecular transducer activity signaling receptor activity transmembrane signaling receptor activity acetylcholine receptor activity cation binding acetylcholine binding ion binding binding small molecule binding transmitter-gated monoatomic ion channel activity monoatomic cation transmembrane transporter activity transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential excitatory extracellular ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity monoatomic cation channel activity acetylcholine-gated monoatomic cation-selective channel activity transmitter-gated channel activity ligand-gated monoatomic cation channel activity	behavior multicellular organismal process system process learning learning or memory nervous system process cognition regulation of biological process regulation of cellular process regulation of amine metabolic process biological regulation dopamine metabolic process primary metabolic process catechol-containing compound metabolic process behavior multicellular organismal process system process learning learning or memory nervous system process cognition regulation of biological process regulation of cellular process regulation of amine metabolic process biological regulation dopamine metabolic process primary metabolic process catechol-containing compound metabolic process regulation of primary metabolic process amine metabolic process catecholamine metabolic process phenol-containing compound metabolic process metabolic process cellular process regulation of catecholamine metabolic process regulation of metabolic process biogenic amine metabolic process regulation of dopamine metabolic process localization transport monoatomic ion transport establishment of localization immune system process B cell activation cell activation lymphocyte activation leukocyte activation memory trans-synaptic signaling regulation of signaling signaling modulation of chemical synaptic transmission regulation of synaptic transmission, dopaminergic cell-cell signaling chemical synaptic transmission cell communication synaptic signaling regulation of trans-synaptic signaling anterograde trans-synaptic signaling regulation of cell communication synaptic transmission, dopaminergic axonogenesis cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development central nervous system neuron development neuron projection development cell morphogenesis cellular component organization neurogenesis multicellular organism development central nervous system neuron differentiation cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation anatomical structure development cellular component organization or biogenesis system development developmental process central nervous system projection neuron axonogenesis central nervous system neuron axonogenesis plasma membrane bounded cell projection organization nervous system development axon development cell morphogenesis involved in neuron differentiation generation of neurons anatomical structure morphogenesis central nervous system development neuron development sensory perception sensory perception of sound sensory perception of mechanical stimulus response to decreased oxygen levels response to stimulus response to hypoxia response to stress response to oxygen levels response to abiotic stimulus regulation of cellular component organization cellular component biogenesis cellular component assembly cell junction assembly regulation of synapse structure or activity regulation of synapse assembly synapse organization regulation of biological quality regulation of cellular component biogenesis regulation of cell junction assembly regulation of synapse organization cell junction organization synapse assembly positive regulation of cell population proliferation positive regulation of B cell proliferation regulation of leukocyte activation positive regulation of biological process regulation of cell activation leukocyte proliferation positive regulation of lymphocyte activation positive regulation of cell activation regulation of B cell proliferation lymphocyte proliferation regulation of B cell activation positive regulation of leukocyte activation positive regulation of mononuclear cell proliferation regulation of immune system process regulation of multicellular organismal process positive regulation of immune system process positive regulation of cellular process regulation of lymphocyte proliferation regulation of leukocyte proliferation cell population proliferation positive regulation of lymphocyte proliferation B cell proliferation positive regulation of B cell activation regulation of cell population proliferation mononuclear cell proliferation positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation positive regulation of multicellular organismal process regulation of lymphocyte activation cellular response to nitrogen compound cellular response to stimulus cellular response to acetylcholine response to oxygen-containing compound response to nitrogen compound acetylcholine receptor signaling pathway postsynaptic signal transduction cellular response to oxygen-containing compound cellular response to chemical stimulus response to chemical response to acetylcholine signal transduction excretion micturition renal system process synaptic transmission involved in micturition neuromuscular synaptic transmission nerve development vestibulocochlear nerve development cranial nerve development circadian sleep/wake cycle, sleep rhythmic process circadian sleep/wake cycle rhythmic behavior regulation of circadian sleep/wake cycle, REM sleep circadian rhythm regulation of circadian sleep/wake cycle regulation of circadian rhythm regulation of behavior circadian behavior circadian sleep/wake cycle, REM sleep sleep regulation of circadian sleep/wake cycle, sleep circadian sleep/wake cycle process locomotory behavior cranial nerve morphogenesis optic nerve morphogenesis optic nerve development smooth muscle contraction muscle contraction muscle system process regulation of localization nitrogen compound transport regulation of catecholamine secretion organic hydroxy compound transport secretion by cell regulation of secretion by cell signal release secretion regulation of transport export from cell dopamine secretion regulation of secretion catecholamine secretion amine transport regulation of amine transport regulation of dopamine secretion transmembrane transport monoatomic ion transmembrane transport positive regulation of secretion by cell positive regulation of amine transport positive regulation of secretion positive regulation of catecholamine secretion positive regulation of dopamine secretion positive regulation of transport response to light stimulus visual learning visual behavior associative learning response to radiation response to alcohol response to ethanol head development forebrain development animal organ development brain development diencephalon development lateral geniculate nucleus development thalamus development neural nucleus development regulation of action potential negative regulation of action potential negative regulation of biological process action potential regulation of membrane potential biological process involved in intraspecies interaction between organisms social behavior sensory perception of light stimulus visual perception regulation of neuron projection development regulation of developmental process dendrite development regulation of dendrite morphogenesis regulation of anatomical structure morphogenesis regulation of cell projection organization dendrite morphogenesis regulation of dendrite development regulation of plasma membrane bounded cell projection organization membrane depolarization adult behavior response to nicotine behavioral response to nicotine monoatomic cation transport calcium ion transport metal ion transport sensory perception of pain synaptic transmission, cholinergic response to cocaine response to alkaloid	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface external side of plasma membrane side of membrane presynapse cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface external side of plasma membrane side of membrane presynapse presynaptic membrane cell projection neuron projection plasma membrane bounded cell projection protein-containing complex neurotransmitter receptor complex plasma membrane protein complex plasma membrane signaling receptor complex membrane protein complex signaling receptor complex transporter complex acetylcholine-gated channel complex transmembrane transporter complex monoatomic ion channel complex membrane microdomain membrane raft plasma membrane raft
A, D	Neuronal acetylcholine receptor subunit alpha-4	ligand-gated channel activity 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 neurotransmitter receptor activity postsynaptic neurotransmitter receptor activity molecular transducer activity signaling receptor activity transmembrane signaling receptor activity ligand-gated channel activity 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 neurotransmitter receptor activity postsynaptic neurotransmitter receptor activity molecular transducer activity signaling receptor activity transmembrane signaling receptor activity acetylcholine receptor activity cation binding acetylcholine binding ion binding binding small molecule binding ATP-dependent activity, acting on DNA ATP-dependent chromatin remodeler activity catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid catalytic activity ATP-dependent activity transmitter-gated monoatomic ion channel activity monoatomic cation transmembrane transporter activity transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential excitatory extracellular ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity monoatomic cation channel activity acetylcholine-gated monoatomic cation-selective channel activity transmitter-gated channel activity ligand-gated monoatomic cation channel activity	trans-synaptic signaling regulation of biological process regulation of signaling regulation of cellular process modulation of chemical synaptic transmission signaling biological regulation cell-cell signaling presynaptic modulation of chemical synaptic transmission chemical synaptic transmission cell communication synaptic signaling regulation of trans-synaptic signaling anterograde trans-synaptic signaling trans-synaptic signaling regulation of biological process regulation of signaling regulation of cellular process modulation of chemical synaptic transmission signaling biological regulation cell-cell signaling presynaptic modulation of chemical synaptic transmission chemical synaptic transmission cell communication synaptic signaling regulation of trans-synaptic signaling anterograde trans-synaptic signaling regulation of cell communication cellular process action potential regulation of biological quality regulation of membrane potential localization transport monoatomic ion transport establishment of localization regulation of localization nitrogen compound transport regulation of catecholamine secretion organic hydroxy compound transport secretion by cell regulation of secretion by cell signal release secretion regulation of transport export from cell dopamine secretion regulation of secretion catecholamine secretion amine transport regulation of amine transport regulation of dopamine secretion multicellular organismal process immune system process B cell activation cell activation lymphocyte activation leukocyte activation transmembrane transport monoatomic ion transmembrane transport system process nervous system process cognition cellular response to stimulus response to stimulus signal transduction neuromuscular synaptic transmission primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process cellular response to stress DNA damage response response to stress metabolic process macromolecule metabolic process DNA repair regulation of postsynaptic membrane potential chemical synaptic transmission, postsynaptic cell surface receptor signaling pathway inhibitory postsynaptic potential response to decreased oxygen levels response to hypoxia response to oxygen levels response to abiotic stimulus membrane depolarization behavior adult behavior response to chemical response to nicotine behavioral response to nicotine monoatomic cation transport calcium ion transport metal ion transport sensory perception sensory perception of pain response to oxidative stress cellular response to nitrogen compound cellular response to acetylcholine response to oxygen-containing compound response to nitrogen compound acetylcholine receptor signaling pathway postsynaptic signal transduction cellular response to oxygen-containing compound cellular response to chemical stimulus response to acetylcholine synaptic transmission, cholinergic	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface external side of plasma membrane side of membrane presynapse cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface external side of plasma membrane side of membrane presynapse presynaptic membrane somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection protein-containing complex transmembrane transporter complex membrane protein complex cation channel complex transporter complex monoatomic ion channel complex neurotransmitter receptor complex plasma membrane protein complex plasma membrane signaling receptor complex signaling receptor complex acetylcholine-gated channel complex cell body neuronal cell body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, C, E	IPR002394	Nicotinic acetylcholine receptor	Family
B, C, E	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
B, C, E	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
B, C, E	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
B, C, E	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
B, C, E	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
B, C, E	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
B, C, E	IPR006201	Neurotransmitter-gated ion-channel	Family
A, D	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
A, D	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
A, D	IPR002394	Nicotinic acetylcholine receptor	Family
A, D	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
A, D	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
A, D	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
A, D	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
A, D	IPR006201	Neurotransmitter-gated ion-channel	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B, C, E	: P17787	autosomal dominant nocturnal frontal lobe epilepsy 3 Alzheimer disease Sudden infant death syndrome substance withdrawal syndrome nicotine dependence frontal lobe epilepsy hyperreflexia autosomal dominant nocturnal frontal lobe epilepsy pellagra glioblastoma malignant ependymoma autism sleep-wake disorder osteosarcoma pilocytic astrocytoma autosomal dominant nocturnal frontal lobe epilepsy 3 Alzheimer disease Sudden infant death syndrome substance withdrawal syndrome nicotine dependence frontal lobe epilepsy hyperreflexia autosomal dominant nocturnal frontal lobe epilepsy pellagra glioblastoma malignant ependymoma autism sleep-wake disorder osteosarcoma pilocytic astrocytoma anxiety disorder lung adenocarcinoma schizophrenia attention deficit hyperactivity disorder, inattentive type malignant glioma epilepsy intellectual disability lung carcinoma atypical teratoid rhabdoid tumor
A, D	: P43681	autosomal dominant nocturnal frontal lobe epilepsy 1 nicotine dependence frontal lobe epilepsy Inflammation nervous system disorder dystonic disorder autosomal dominant nocturnal frontal lobe epilepsy visual epilepsy developmental disability psoriasis epilepsy episodic kinesigenic dyskinesia 1 autism chronic obstructive pulmonary disease depressive disorder autosomal dominant nocturnal frontal lobe epilepsy 1 nicotine dependence frontal lobe epilepsy Inflammation nervous system disorder dystonic disorder autosomal dominant nocturnal frontal lobe epilepsy visual epilepsy developmental disability psoriasis epilepsy episodic kinesigenic dyskinesia 1 autism chronic obstructive pulmonary disease depressive disorder schizophrenia sleep-wake disorder intellectual disability cocaine abuse pellagra attention deficit hyperactivity disorder, inattentive type

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

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.