9C2A | pdb_00009c2a

Cryo-EM structure of the human P2X1 receptor in the apo closed state

External Resource: Annotation

Domain Annotation: ECOD Classification
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	Reovirus_L2_GTase	e9c2aC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)
B	Reovirus_L2_GTase	e9c2aB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)
A	Reovirus_L2_GTase	e9c2aA1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	P2X purinoceptor 1	monoatomic cation transmembrane transporter activity monoatomic cation channel activity passive transmembrane transporter activity monoatomic ion channel activity channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity extracellularly ATP-gated monoatomic cation channel activity gated channel activity ATP-gated ion channel activity excitatory extracellular ligand-gated monoatomic ion channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation transmembrane transporter activity monoatomic cation channel activity passive transmembrane transporter activity monoatomic ion channel activity channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity extracellularly ATP-gated monoatomic cation channel activity gated channel activity ATP-gated ion channel activity excitatory extracellular ligand-gated monoatomic ion channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity extracellular ligand-gated monoatomic ion channel activity ligand-gated monoatomic cation channel activity calcium channel activity calcium ion transmembrane transporter activity ligand-gated calcium channel activity metal ion transmembrane transporter activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity purinergic nucleotide receptor activity nucleotide receptor activity protein-containing complex binding organic acid binding suramin binding sulfur compound binding identical protein binding protein binding	multicellular organismal process system process circulatory system process regulation of blood pressure biological regulation regulation of biological quality blood circulation localization transport monoatomic ion transport establishment of localization cellular process apoptotic process cell death multicellular organismal process system process circulatory system process regulation of blood pressure biological regulation regulation of biological quality blood circulation localization transport monoatomic ion transport establishment of localization cellular process apoptotic process cell death programmed cell death cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling signal transduction cell communication monoatomic ion transmembrane transport calcium ion transport metal ion transport monoatomic cation transmembrane transport transmembrane transport monoatomic cation transport calcium ion transmembrane transport nervous system process action potential transmission of nerve impulse neuronal action potential regulation of membrane potential regulation of calcium ion transport regulation of localization import into cell positive regulation of cation transmembrane transport positive regulation of calcium ion transport positive regulation of calcium ion import positive regulation of biological process regulation of monoatomic ion transmembrane transport regulation of calcium ion transmembrane transport positive regulation of calcium ion import across plasma membrane positive regulation of monoatomic ion transport positive regulation of calcium ion transmembrane transport positive regulation of transmembrane transport positive regulation of monoatomic ion transmembrane transport calcium ion import into cytosol regulation of metal ion transport positive regulation of cellular process regulation of calcium ion import calcium ion transmembrane import into cytosol regulation of transport regulation of monoatomic ion transport import across plasma membrane inorganic cation import across plasma membrane regulation of transmembrane transport calcium ion import across plasma membrane positive regulation of transport regulation of calcium ion import across plasma membrane inorganic ion import across plasma membrane regulation of monoatomic cation transmembrane transport calcium ion import response to chemical response to organophosphorus response to oxygen-containing compound response to nitrogen compound response to ATP response to purine-containing compound inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis regulation of cytosolic calcium ion concentration regulation of presynaptic cytosolic calcium ion concentration cellular homeostasis neuron cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis cellular localization regulated exocytosis modulation of chemical synaptic transmission synaptic vesicle cycle synaptic vesicle exocytosis vesicle-mediated transport vesicle-mediated transport in synapse regulation of regulated secretory pathway synaptic signaling regulation of secretion by cell secretion by cell signal release establishment of localization in cell trans-synaptic signaling regulation of signaling neurotransmitter secretion secretion regulation of neurotransmitter transport regulation of synaptic vesicle exocytosis export from cell cell-cell signaling neurotransmitter transport regulation of vesicle-mediated transport regulation of secretion chemical synaptic transmission signal release from synapse regulation of trans-synaptic signaling exocytosis regulation of neurotransmitter secretion anterograde trans-synaptic signaling regulation of exocytosis regulation of cell communication synaptic transmission, glutamatergic	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle organelle membrane secretory granule membrane specific granule cell surface external side of plasma membrane side of membrane membrane microdomain membrane raft protein-containing complex glutamatergic synapse presynaptic active zone membrane presynaptic membrane presynapse presynaptic active zone

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR059116	ATP P2X receptor-like	Family
A, B, C	IPR053792	ATP P2X receptor, conserved site	Conserved Site
A, B, C	IPR001429	P2X purinoreceptor	Family
A, B, C	IPR027309	P2X purinoreceptor extracellular domain superfamily	Homologous Superfamily
A, B, C	IPR003044	P2X1 purinoceptor	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C	: P51575	platelet-type bleeding disorder 8 Encephalopathy, Toxic pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia facioscapulohumeral muscular dystrophy non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma malignant pancreatic neoplasm osteosarcoma pancreatic intraductal papillary-mucinous neoplasm psoriasis toxic encephalopathy

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	ATP-gated P2X₁ ion channel, apo closed state

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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.