Annotations: 7D3U

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	F_UNCLASSIFIED	e7d3uC1	A: alpha complex topology	X: NADH-quinone oxidoreductase subunit K (From Topology)	H: NADH-quinone oxidoreductase subunit K (From Topology)	T: NADH-quinone oxidoreductase subunit K	F: F_UNCLASSIFIED	ECOD (1.6)
A [auth D]	Proton_antipo_M	e7d3uD1	A: alpha complex topology	X: Sodium/proton antiporter subunits-like (From Homology)	H: Sodium/proton antiporter subunits-like	T: NADH-quinone oxidoreductase subunit L (NuoL)-related	F: Proton_antipo_M	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	1.10.287.3510	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (utative)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
F [auth E]	Cation antiporter	monoatomic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity	-	cell periphery cellular anatomical structure plasma membrane membrane
E [auth G]	Monovalent Na+/H+ antiporter subunit G	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	-	-
D [auth F]	Monovalent Na+/H+ antiporter subunit F	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	-	cell periphery cellular anatomical structure plasma membrane membrane
C	Monovalent Na+/H+ antiporter subunit C	-	-	cell periphery cellular anatomical structure plasma membrane membrane
B [auth A]	Monovalent Na+/H+ antiporter subunit A	antiporter activity active transmembrane transporter activity transporter activity transmembrane transporter activity secondary active transmembrane transporter activity	localization transport monoatomic ion transport establishment of localization	cell periphery cellular anatomical structure plasma membrane membrane
A [auth D]	Monovalent Na+/H+ antiporter subunit D	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity NADH dehydrogenase (ubiquinone) activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity	aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds respiratory electron transport chain ATP synthesis coupled electron transport electron transport chain metabolic process cellular process generation of precursor metabolites and energy	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
F [auth E]	IPR002758	Na+/H+ antiporter subunit E	Family
E [auth G]	IPR005133	Na+/H+ antiporter subunit G	Family
D [auth F]	IPR007208	Na(+)/H(+) antiporter subunit F-like	Family
C	IPR039428	NADH-ubiquinone oxidoreductase chain 4L/Mnh complex subunit C1-like	Family
C	IPR050601	CPA3 antiporter subunit C	Family
B [auth A]	IPR025383	MrpA C-terminal/MbhD	Domain
B [auth A]	IPR050616	CPA3 Na+/H+ Antiporter Subunit A	Family
B [auth A]	IPR007182	Na+/H+ antiporter MnhB subunit-related protein	Domain
B [auth A]	IPR046806	MrpA C-terminal/MbhE	Domain
B [auth A]	IPR001516	NADH-Ubiquinone oxidoreductase (complex I), chain 5 N-terminal	Domain
B [auth A]	IPR001750	NADH:quinone oxidoreductase/Mrp antiporter, transmembrane domain	Domain
A [auth D]	IPR050586	CPA3 Na+/H+ Antiporter Subunit D	Family
A [auth D]	IPR003918	NADH:ubiquinone oxidoreductase	Family
A [auth D]	IPR001750	NADH:quinone oxidoreductase/Mrp antiporter, transmembrane domain	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth D], B [auth A], C, D [auth F], E [auth G] A [auth D], B [auth A], C, D [auth F], E [auth G], F [auth E]	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex I (NADH dehydrogenase) and supercomplexes	H+ or Na+ translocating NADH dehydrogenase

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth D], B [auth A], C, D [auth F], E [auth G] A [auth D], B [auth A], C, D [auth F], E [auth G], F [auth E]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A [auth D], B [auth A], C, D [auth F], E [auth G] A [auth D], B [auth A], C, D [auth F], E [auth G], F [auth E]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth D], B [auth A], C, D [auth F], E [auth G] A [auth D], B [auth A], C, D [auth F], E [auth G], F [auth E]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Antiporters	Multiple resistance & pH adaptation (Mrp) complex Na⁺/H⁺ antiporter

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.