Annotations: 8C21

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF02932	Neurotransmitter-gated ion-channel transmembrane region (Neur_chan_memb)	Neurotransmitter-gated ion-channel transmembrane region	-	Family
A, B, C, D	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
A, B, C, D	5-hydroxytryptamine receptor 3A	cation binding binding ion binding serotonin binding amine binding heterocyclic compound binding small molecule binding transmitter-gated monoatomic ion channel activity monoatomic cation transmembrane transporter activity molecular transducer activity gated channel activity monoatomic ion channel activity serotonin-gated monoatomic cation channel activity signaling receptor activity cation binding binding ion binding serotonin binding amine binding heterocyclic compound binding small molecule binding transmitter-gated monoatomic ion channel activity monoatomic cation transmembrane transporter activity molecular transducer activity gated channel activity monoatomic ion channel activity serotonin-gated monoatomic cation channel activity signaling receptor activity neurotransmitter receptor activity ligand-gated channel activity ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity serotonin receptor activity channel activity transmembrane signaling receptor activity transmitter-gated channel activity monoatomic ion transmembrane transporter activity transporter activity ligand-gated monoatomic cation channel activity transmembrane transporter activity ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential identical protein binding protein binding	cellular response to nitrogen compound cellular response to stimulus response to dopamine regulation of cellular process ligand-gated ion channel signaling pathway response to stimulus signaling cellular response to dopamine response to monoamine cell communication response to catecholamine serotonin-gated cation-selective signaling pathway cellular response to catecholamine stimulus signal transduction cellular response to nitrogen compound cellular response to stimulus response to dopamine regulation of cellular process ligand-gated ion channel signaling pathway response to stimulus signaling cellular response to dopamine response to monoamine cell communication response to catecholamine serotonin-gated cation-selective signaling pathway cellular response to catecholamine stimulus signal transduction regulation of biological process serotonin receptor signaling pathway biological regulation response to oxygen-containing compound response to nitrogen compound cellular response to oxygen-containing compound cellular response to chemical stimulus cellular response to monoamine stimulus response to chemical cellular process transmembrane transport localization transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell division site cleavage furrow protein-containing complex serotonin-activated cation-selective channel complex cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell division site cleavage furrow protein-containing complex serotonin-activated cation-selective channel complex plasma membrane protein complex membrane protein complex cation channel complex transporter complex receptor complex neurotransmitter receptor complex transmembrane transporter complex plasma membrane signaling receptor complex serotonin receptor complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR018000	Neurotransmitter-gated ion-channel, conserved site	Conserved Site
A, B, C, D	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
A, B, C, D	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
A, B, C, D	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
A, B, C, D	IPR049944	5-hydroxytryptamine 3 receptor, transmembrane domain	Domain
A, B, C, D	IPR006029	Neurotransmitter-gated ion-channel transmembrane domain	Domain
A, B, C, D	IPR008133	5-hydroxytryptamine 3 receptor, A subunit	Family
A, B, C, D	IPR008132	5-hydroxytryptamine 3 receptor	Family
A, B, C, D	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
A, B, C, D	IPR006201	Neurotransmitter-gated ion-channel	Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Cys-Loop Receptor Family	Serotonin 5-HT_3A receptor with bound serotonin in Salipro bilayer discs, holo and asymmetric

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.