Annotations: 7P1K

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	Na_H_Exchanger_1	e7p1kA1	A: alpha complex topology	X: Cation-proton antiporter	H: Cation-proton antiporter (CPA) (From Topology)	T: Cation-proton antiporter (CPA)	F: Na_H_Exchanger_1	ECOD (1.6)
A [auth B]	Na_H_Exchanger_1	e7p1kB1	A: alpha complex topology	X: Cation-proton antiporter	H: Cation-proton antiporter (CPA) (From Topology)	T: Cation-proton antiporter (CPA)	F: Na_H_Exchanger_1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF00999	Sodium/hydrogen exchanger, transmembrane (Na_H_Exchanger)	Sodium/hydrogen exchanger, transmembrane	Na/H antiporters are key transporters in maintaining the pH of actively metabolising cells. The molecular mechanisms of antiport are unclear. These antiporters contain 10-12 transmembrane regions (M) at the amino-terminus and a large cytoplasmic regi ...	Na/H antiporters are key transporters in maintaining the pH of actively metabolising cells. The molecular mechanisms of antiport are unclear. These antiporters contain 10-12 transmembrane regions (M) at the amino-terminus and a large cytoplasmic region at the carboxyl terminus. The transmembrane regions M3-M12 share identity with other members of the family. The M6 and M7 regions are highly conserved. Thus, this is thought to be the region that is involved in the transport of sodium and hydrogen ions. The cytoplasmic region has little similarity throughout the family. This entry represents the transmembrane region.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	mitochondrial sodium/hydrogen exchanger 9B2	monoatomic cation transmembrane transporter activity metal cation:monoatomic cation antiporter activity proton transmembrane transporter activity sodium:proton antiporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity antiporter activity metal cation:proton antiporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity lithium:proton antiporter activity monoatomic cation transmembrane transporter activity metal cation:monoatomic cation antiporter activity proton transmembrane transporter activity sodium:proton antiporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity antiporter activity metal cation:proton antiporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity lithium:proton antiporter activity cation binding ion binding binding metal ion binding small molecule binding identical protein binding protein binding	localization transport monoatomic ion transport lithium ion transport monoatomic cation transport establishment of localization metal ion transport sodium ion transport multicellular organismal process regulation of leukocyte differentiation regulation of cellular process regulation of cell differentiation regulation of cell development positive regulation of developmental process localization transport monoatomic ion transport lithium ion transport monoatomic cation transport establishment of localization metal ion transport sodium ion transport multicellular organismal process regulation of leukocyte differentiation regulation of cellular process regulation of cell differentiation regulation of cell development positive regulation of developmental process multicellular organism development skeletal system development cell differentiation anatomical structure development regulation of immune system process positive regulation of immune system process regulation of osteoclast development system development developmental process regulation of biological process positive regulation of cell development regulation of myeloid leukocyte differentiation osteoclast development positive regulation of myeloid leukocyte differentiation positive regulation of multicellular organismal process leukocyte differentiation myeloid leukocyte differentiation cellular developmental process regulation of developmental process positive regulation of biological process cell development positive regulation of osteoclast differentiation regulation of osteoclast differentiation positive regulation of cell differentiation positive regulation of hemopoiesis bone cell development osteoclast differentiation regulation of multicellular organismal process bone development positive regulation of cellular process positive regulation of osteoclast development regulation of multicellular organismal development hemopoiesis regulation of myeloid cell differentiation animal organ development biological regulation myeloid cell differentiation immune system process myeloid cell development positive regulation of myeloid cell differentiation regulation of hemopoiesis cellular process positive regulation of leukocyte differentiation sodium ion homeostasis inorganic ion homeostasis chemical homeostasis homeostatic process monoatomic ion homeostasis monoatomic cation homeostasis cellular response to stimulus regulation of localization establishment of protein localization nitrogen compound transport response to stimulus cell communication carbohydrate homeostasis establishment of localization in cell intracellular protein localization regulation of biological quality regulation of peptide hormone secretion regulation of hormone levels establishment of protein localization to extracellular region intracellular glucose homeostasis protein secretion cellular response to oxygen-containing compound regulation of protein secretion regulation of secretion cellular response to carbohydrate stimulus response to glucose response to chemical glucose homeostasis insulin secretion involved in cellular response to glucose stimulus cellular localization regulation of hormone secretion regulation of protein localization regulation of peptide secretion signaling hormone secretion protein localization to extracellular region peptide secretion regulation of secretion by cell secretion by cell response to monosaccharide response to carbohydrate amide transport signal release cellular response to hexose stimulus intracellular chemical homeostasis cellular response to monosaccharide stimulus regulation of signaling regulation of transport secretion regulation of peptide transport regulation of establishment of protein localization export from cell cell-cell signaling response to oxygen-containing compound cellular response to glucose stimulus regulation of protein transport peptide transport response to hexose cellular response to chemical stimulus cellular homeostasis regulation of cellular localization protein transport regulation of insulin secretion peptide hormone secretion macromolecule localization regulation of insulin secretion involved in cellular response to glucose stimulus hormone transport regulation of cell communication insulin secretion import into cell clathrin-dependent endocytosis receptor-mediated endocytosis endocytosis vesicle-mediated transport sperm motility reproductive process cilium movement involved in cell motility cilium or flagellum-dependent cell motility cilium-dependent cell motility flagellated sperm motility microtubule-based movement microtubule-based process cilium movement cell motility	endosome membrane membrane-bounded organelle intracellular anatomical structure membrane endosome intracellular vesicle intracellular membrane-bounded organelle recycling endosome endomembrane system intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle recycling endosome membrane endosome membrane membrane-bounded organelle intracellular anatomical structure membrane endosome intracellular vesicle intracellular membrane-bounded organelle recycling endosome endomembrane system intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure 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 cell periphery apical part of cell plasma membrane plasma membrane region apical plasma membrane mitochondrial membrane mitochondrion organelle envelope mitochondrial envelope basal part of cell basal plasma membrane basolateral plasma membrane synapse transport vesicle membrane presynapse synaptic vesicle synaptic vesicle membrane cell junction transport vesicle exocytic vesicle membrane secretory vesicle exocytic vesicle cell projection sperm principal piece cilium 9+2 motile cilium sperm flagellum motile cilium plasma membrane bounded cell projection

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR051843	Monovalent cation:proton antiporter 1	Family
A [auth B], B [auth A]	IPR006153	Cation/H+ exchanger, transmembrane domain	Domain
A [auth B], B [auth A]	IPR038770	Sodium/solute symporter 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	Monovalent cation-proton antiporter	Sodium-proton antiporter 1

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	Antiporters	Na⁺/H⁺ exchanger NHA2 (SLC9B2) in detergent with N-terminal extension helix

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.