Annotations: 4HFH

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	e4hfhA1	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	e4hfhA2	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	e4hfhB1	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	e4hfhB2	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	e4hfhC1	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	e4hfhC2	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	e4hfhD1	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	e4hfhD2	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)
E	Neur_chan_LBD	e4hfhE1	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	e4hfhE2	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)
A	2.70.170.10	Mainly Beta	Distorted Sandwich	Acetylcholine Binding Protein	Chain: A,	CATH (4.3.0)
A	1.20.58.390	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
B	2.70.170.10	Mainly Beta	Distorted Sandwich	Acetylcholine Binding Protein	Chain: A,	CATH (4.3.0)
B	1.20.58.390	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
C	2.70.170.10	Mainly Beta	Distorted Sandwich	Acetylcholine Binding Protein	Chain: A,	CATH (4.3.0)
C	1.20.58.390	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
D	2.70.170.10	Mainly Beta	Distorted Sandwich	Acetylcholine Binding Protein	Chain: A,	CATH (4.3.0)
D	1.20.58.390	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
E	2.70.170.10	Mainly Beta	Distorted Sandwich	Acetylcholine Binding Protein	Chain: A,	CATH (4.3.0)
E	1.20.58.390	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E	Proton-gated ion channel	monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion channel activity potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity sodium channel activity monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion channel activity potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity sodium channel activity sodium ion transmembrane transporter activity ligand-gated channel activity ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity gated channel activity identical protein binding protein binding binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity	-	protein-containing complex transmembrane transporter complex membrane membrane protein complex cellular anatomical entity transporter complex cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E	IPR038050	Neuronal acetylcholine receptor	Homologous Superfamily
A, B, C, D, E	IPR006202	Neurotransmitter-gated ion-channel ligand-binding domain	Domain
A, B, C, D, E	IPR036719	Neurotransmitter-gated ion-channel transmembrane domain superfamily	Homologous Superfamily
A, B, C, D, E	IPR006028	Gamma-aminobutyric acid A receptor/Glycine receptor alpha	Family
A, B, C, D, E	IPR036734	Neurotransmitter-gated ion-channel ligand-binding domain superfamily	Homologous Superfamily
A, B, C, D, E	IPR006201	Neurotransmitter-gated ion-channel	Family

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

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.