Annotations: 3L9X

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	TrkA_N	e3l9xA3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
A	FMN_red	e3l9xA2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Flavoproteins/Phosphotyrosine protein phosphatases-like	T: Flavoproteins	F: FMN_red	ECOD (1.6)
B	TrkA_N	e3l9xB3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
B	FMN_red	e3l9xB2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Flavoproteins/Phosphotyrosine protein phosphatases-like	T: Flavoproteins	F: FMN_red	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
A	3.40.50.360	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Flavodoxin domain	CATH (4.3.0)
B	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
B	3.40.50.360	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Flavodoxin domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02525	Flavodoxin-like fold (Flavodoxin_2)	Flavodoxin-like fold	This family consists of a domain with a flavodoxin-like fold. The family includes bacterial and eukaryotic NAD(P)H dehydrogenase (quinone) EC:1.6.99.2. These enzymes catalyse the NAD(P)H-dependent two-electron reductions of quinones and protect cell ...	This family consists of a domain with a flavodoxin-like fold. The family includes bacterial and eukaryotic NAD(P)H dehydrogenase (quinone) EC:1.6.99.2. These enzymes catalyse the NAD(P)H-dependent two-electron reductions of quinones and protect cells against damage by free radicals and reactive oxygen species [1]. This enzyme uses a FAD co-factor. The equation for this reaction is:- NAD(P)H + acceptor <=> NAD(P)(+) + reduced acceptor. This enzyme is also involved in the bioactivation of prodrugs used in chemotherapy [1]. The family also includes acyl carrier protein phosphodiesterase EC:3.1.4.14. This enzyme converts holo-ACP to apo-ACP by hydrolytic cleavage of the phosphopantetheine residue from ACP [2]. This family is related to Pfam:PF03358 and Pfam:PF00258.	Domain
A, B	PF02254	TrkA-N domain (TrkA_N)	TrkA-N domain	This domain is found in a wide variety of proteins. These protein include potassium channels Swiss:P31069, phosphoesterases Swiss:Q59027, and various other transporters. This domain binds to NAD.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Glutathione-regulated potassium-efflux system protein kefC, linker, ancillary protein kefF	oxidoreductase activity NADH:ubiquinone reductase (non-electrogenic) activity oxidoreductase activity, acting on NAD(P)H catalytic activity oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor NADH dehydrogenase activity binding nucleotide binding FMN binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding heterocyclic compound binding oxidoreductase activity NADH:ubiquinone reductase (non-electrogenic) activity oxidoreductase activity, acting on NAD(P)H catalytic activity oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor NADH dehydrogenase activity binding nucleotide binding FMN binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding identical protein binding protein binding protein homodimerization activity protein dimerization activity NAD(P)H dehydrogenase (quinone) activity NADPH dehydrogenase (quinone) activity electron transfer activity antiporter activity active transmembrane transporter activity transporter activity transmembrane transporter activity secondary active transmembrane transporter activity toxic substance binding monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity active monoatomic ion transmembrane transporter activity glutathione-regulated potassium exporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity metal ion transmembrane transporter activity enzyme binding	localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport homeostatic process biological regulation regulation of intracellular pH cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis regulation of pH localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport homeostatic process biological regulation regulation of intracellular pH cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis regulation of pH monoatomic ion homeostasis intracellular chemical homeostasis regulation of biological quality monoatomic cation homeostasis regulation of cellular pH intracellular monoatomic ion homeostasis intracellular pH elevation regulation of localization positive regulation of cation transmembrane transport regulation of cellular process regulation of potassium ion transport monoatomic ion transmembrane transport positive regulation of biological process potassium ion transmembrane transport regulation of monoatomic ion transmembrane transport monoatomic cation transmembrane transport positive regulation of monoatomic ion transport positive regulation of transmembrane transport positive regulation of monoatomic ion transmembrane transport regulation of metal ion transport positive regulation of cellular process regulation of biological process regulation of transport regulation of monoatomic ion transport inorganic ion transmembrane transport regulation of potassium ion transmembrane transport inorganic cation transmembrane transport transmembrane transport positive regulation of potassium ion transport regulation of transmembrane transport positive regulation of transport positive regulation of potassium ion transmembrane transport cellular process regulation of monoatomic cation transmembrane transport proton transmembrane transport response to ketone response to stimulus response to chemical response to oxygen-containing compound response to methylglyoxal response to hydrogen peroxide response to oxidative stress response to stress response to reactive oxygen species response to toxic substance	potassium:proton antiporter complex protein-containing complex transmembrane transporter complex membrane membrane protein complex cellular anatomical entity transporter complex cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR023948	Glutathione-regulated potassium-efflux system ancillary protein KefF	Family
A, B	IPR003680	Flavodoxin-like fold	Domain
A, B	IPR029039	Flavoprotein-like superfamily	Homologous Superfamily
A, B	IPR046980	Glutathione-regulated potassium-efflux system ancillary protein KefG/KefF	Family
A, B	IPR006036	Potassium uptake protein TrkA	Family
A, B	IPR023941	Glutathione-regulated potassium-efflux system protein KefC	Family
A, B	IPR006153	Cation/H+ exchanger	Domain
A, B	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A, B	IPR003148	Regulator of K+ conductance, N-terminal	Domain
A, B	IPR004771	K+/H+ exchanger	Domain
A, B	IPR038770	Sodium/solute symporter superfamily	Homologous Superfamily

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.