Annotations: 6C9A

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	Ion_trans	e6c9aB2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans	ECOD (1.6)
B [auth A]	Ion_trans	e6c9aA2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	Two pore calcium channel protein 1	phosphatidylinositol-3,5-bisphosphate binding binding ion binding anion binding phosphatidylinositol bisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate binding phosphatidylinositol binding small molecule binding monoatomic cation transmembrane transporter activity voltage-gated sodium channel activity monoatomic ion channel activity sodium channel activity phosphatidylinositol-3,5-bisphosphate binding binding ion binding anion binding phosphatidylinositol bisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate binding phosphatidylinositol binding small molecule binding monoatomic cation transmembrane transporter activity voltage-gated sodium channel activity monoatomic ion channel activity sodium channel activity sodium ion transmembrane transporter activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity channel activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity gated channel activity ligand-gated sodium channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity ligand-gated monoatomic cation channel activity identical protein binding protein binding protein homodimerization activity protein dimerization activity SNARE binding syntaxin binding voltage-gated channel activity calcium channel activity intracellularly ligand-gated monoatomic ion channel activity NAADP-sensitive calcium-release channel activity intracellularly gated calcium channel activity calcium ion transmembrane transporter activity ligand-gated calcium channel activity intracellularly phosphatidylinositol-3,5-bisphosphate-gated monatomic cation channel activity	import into cell biological process involved in interspecies interaction between organisms transport viral life cycle establishment of localization biological process involved in interaction with host vesicle-mediated transport biological process involved in symbiotic interaction localization symbiont entry into host cell viral process symbiont entry into host cellular process endocytosis involved in viral entry into host cell import into cell biological process involved in interspecies interaction between organisms transport viral life cycle establishment of localization biological process involved in interaction with host vesicle-mediated transport biological process involved in symbiotic interaction localization symbiont entry into host cell viral process symbiont entry into host cellular process endocytosis involved in viral entry into host cell endocytosis transport of virus positive regulation of autophagy regulation of biological process catabolic process regulation of cellular process cellular metabolic process autophagy biological regulation positive regulation of biological process regulation of cellular metabolic process positive regulation of cellular metabolic process regulation of catabolic process regulation of autophagy cellular catabolic process positive regulation of catabolic process positive regulation of metabolic process regulation of cellular catabolic process positive regulation of cellular catabolic process metabolic process process utilizing autophagic mechanism regulation of metabolic process positive regulation of cellular process monoatomic ion transmembrane transport sodium ion transmembrane transport inorganic ion transmembrane transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport monoatomic ion transport monoatomic cation transport sodium ion transport	endosome membrane membrane-bounded organelle intracellular anatomical structure membrane endosome intracellular vesicle cellular anatomical entity intracellular membrane-bounded organelle recycling endosome endomembrane system intracellular organelle cytoplasmic vesicle membrane bounding membrane of organelle recycling endosome membrane endosome membrane membrane-bounded organelle intracellular anatomical structure membrane endosome intracellular vesicle cellular anatomical entity intracellular membrane-bounded organelle recycling endosome endomembrane system intracellular organelle cytoplasmic vesicle membrane bounding membrane of organelle recycling endosome membrane vesicle membrane cytoplasmic vesicle organelle cytoplasm vesicle organelle membrane vacuolar membrane lytic vacuole vacuole lytic vacuole membrane lysosomal membrane lysosome early endosome early endosome membrane endolysosome protein-containing complex transmembrane transporter complex membrane protein complex transporter complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR005821	Ion transport domain	Domain
A [auth B], B [auth A]	IPR028801	Two pore channel protein 1	Family
A [auth B], B [auth A]	IPR027359	Voltage-dependent channel domain superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth B], B [auth A]	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	Two pore Ca2+ channels

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth B], B [auth A]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A [auth B], B [auth A]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth B], B [auth A]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	Two-pore channel TPC1 with bound PtdIns(3,5)P₂

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.