Annotations: 4NTY

Cesium sites in the crystal structure of acid-sensing ion channel in complex with snake toxin

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: mpstruc
Protein Modification Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d4ntyb_	Small proteins	BPTI-like	BPTI-like	automated matches	automated matches	Texas coral snake (Micrurus tener tener ) [TaxId: 1114302 ],	SCOPe (2.08)
C	d4ntyc_	All alpha proteins	Phospholipase A2, PLA2	Phospholipase A2, PLA2	automated matches	automated matches	Texas coral snake (Micrurus tener tener ) [TaxId: 1114302 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	ASICs transmembrane helices-like	8106434	3002854	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Proton-activated chloride channel, extracellular domain-like	8106423	3002853	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	BPTI-like	8070125	3000628	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Phospholipase A2, PLA2	8062779	3001690	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	ThiF	e4ntyA1	A: beta barrels	X: omega toxin-like	H: omega toxin-related	T: omega toxin-related	F: ThiF	ECOD (v294.2)
B	Rep-A_N	e4ntyB1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Rep-A_N	ECOD (v294.2)
C	Rep-A_N	e4ntyC1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Rep-A_N	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.287.770	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	YojJ-like	CATH (4.3.0)
A	2.60.470.10	Mainly Beta	Sandwich	Acid-sensing ion channels like fold	Acid-sensing ion channels like domains	CATH (4.3.0)
A	1.10.3590.10	Mainly Alpha	Orthogonal Bundle	acid-sensing ion channel 1 fold	acid-sensing ion channel 1 domain	CATH (4.3.0)
A	1.10.287.820	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Acid-sensing ion channel domain	CATH (4.3.0)
B	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)
C	1.20.90.10	Mainly Alpha	Up-down Bundle	Phospholipase A2	Phospholipase A2 domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Acid-sensing ion channel 1	monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity ligand-gated sodium channel activity sodium channel activity sodium ion transmembrane transporter activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity ligand-gated monoatomic cation channel activity monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity ligand-gated sodium channel activity sodium channel activity sodium ion transmembrane transporter activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity ligand-gated monoatomic cation channel activity transmembrane transporter activity pH-gated monoatomic ion channel activity identical protein binding protein binding binding	trans-synaptic signaling regulation of biological process cellular localization neurotransmitter secretion transport signaling secretion biological regulation cell-cell signaling export from cell neurotransmitter transport establishment of localization cell communication chemical synaptic transmission localization trans-synaptic signaling regulation of biological process cellular localization neurotransmitter secretion transport signaling secretion biological regulation cell-cell signaling export from cell neurotransmitter transport establishment of localization cell communication chemical synaptic transmission localization signal release from synapse synaptic signaling secretion by cell signal release anterograde trans-synaptic signaling establishment of localization in cell cellular process cellular response to stimulus response to stimulus response to pH cellular response to pH response to abiotic stimulus cellular response to abiotic stimulus cellular response to environmental stimulus monoatomic ion transmembrane transport sodium ion transmembrane transport metal ion transport monoatomic cation transmembrane transport transmembrane transport monoatomic ion transport monoatomic cation transport sodium ion transport	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane presynapse somatodendritic compartment cell projection dendrite cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane presynapse somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection glutamatergic synapse
B	Neurotoxin MitTx-alpha	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity channel regulator activity ion channel regulator activity transporter regulator activity toxin activity	-	cellular anatomical structure extracellular region
C	Basic phospholipase A2 homolog Tx-beta	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding channel regulator activity ion channel regulator activity molecular function regulator activity transporter regulator activity toxin activity phospholipid binding lipid binding	organic anion transport carboxylic acid transport secretion transport arachidonate transport lipid localization lipid transport establishment of localization organic acid transport localization arachidonate secretion monocarboxylic acid transport fatty acid transport icosanoid transport macromolecule localization organic anion transport carboxylic acid transport secretion transport arachidonate transport lipid localization lipid transport establishment of localization organic acid transport localization arachidonate secretion monocarboxylic acid transport fatty acid transport icosanoid transport macromolecule localization icosanoid secretion long-chain fatty acid transport lipid catabolic process catabolic process metabolic process cellular process primary metabolic process lipid metabolic process phospholipid metabolic process organophosphate metabolic process phosphate-containing compound metabolic process phosphorus metabolic process	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001873	Epithelial sodium channel	Family
A	IPR020903	Epithelial sodium channel, conserved site	Conserved Site
A	IPR004724	Epithelial sodium channel, chordates	Family
B	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
B	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
C	IPR033112	Phospholipase A2, aspartic acid active site	Active Site
C	IPR016090	Phospholipase A2-like, central domain	Domain
C	IPR001211	Phospholipase A2	Family
C	IPR036444	Phospholipase A2 domain superfamily	Homologous Superfamily

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Other Ion Channels	ASIC1 Acid-Sensing Ion Channel in complex with MitTx toxin

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B	PCA	Parent Component: GLN : AA0031 : 2-pyrrolidone-5-carboxylic acid (Gln) MOD:00040 , 2-pyrrolidone-5-carboxylic acid (Glu) MOD:00420

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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.