Annotations: 1QRQ

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1qrqb_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	NAD(P)-linked oxidoreductase	Aldo-keto reductases (NADP)	Voltage-dependent K+ channel beta subunit	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
D	d1qrqd_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	NAD(P)-linked oxidoreductase	Aldo-keto reductases (NADP)	Voltage-dependent K+ channel beta subunit	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
C	d1qrqc_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	NAD(P)-linked oxidoreductase	Aldo-keto reductases (NADP)	Voltage-dependent K+ channel beta subunit	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
A	d1qrqa_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	NAD(P)-linked oxidoreductase	Aldo-keto reductases (NADP)	Voltage-dependent K+ channel beta subunit	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	NAD(P)-linked oxidoreductase	8040991	3000288	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	NAD(P)-linked oxidoreductase	8040991	3000288	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	NAD(P)-linked oxidoreductase	8040991	3000288	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	NAD(P)-linked oxidoreductase	8040991	3000288	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	PF27526	e1qrqB1	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: PF27526	ECOD (develop294)
D	PF27526	e1qrqD1	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: PF27526	ECOD (develop294)
C	PF27526	e1qrqC1	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: PF27526	ECOD (develop294)
A	PF27526	e1qrqA1	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: PF27526	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.20.20.100	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	NADP-dependent oxidoreductase domain	CATH (4.3.0)
D	3.20.20.100	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	NADP-dependent oxidoreductase domain	CATH (4.3.0)
C	3.20.20.100	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	NADP-dependent oxidoreductase domain	CATH (4.3.0)
A	3.20.20.100	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	NADP-dependent oxidoreductase domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF00248	Aldo/keto reductase family (Aldo_ket_red)	Aldo/keto reductase family	This family includes a number of K+ ion channel beta chain regulatory domains - these are reported to have oxidoreductase activity [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	PROTEIN (KV BETA2 PROTEIN)	methylglyoxal reductase (NADPH) (acetol producing) activity oxidoreductase activity oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor oxidoreductase activity, acting on CH-OH group of donors catalytic activity monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity methylglyoxal reductase (NADPH) (acetol producing) activity oxidoreductase activity oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor oxidoreductase activity, acting on CH-OH group of donors catalytic activity monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity passive transmembrane transporter activity voltage-gated potassium channel activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity protein binding binding transmembrane transporter binding alcohol dehydrogenase [NAD(P)+] activity alcohol dehydrogenase (NADP+) activity protein-containing complex binding potassium channel regulator activity channel regulator activity ion channel regulator activity molecular function regulator activity transporter regulator activity	developmental process muscle structure development cellular developmental process cell differentiation anatomical structure development cellular process myoblast differentiation localization regulation of localization regulation of biological process protein localization to cell surface regulation of protein localization macromolecule localization biological regulation developmental process muscle structure development cellular developmental process cell differentiation anatomical structure development cellular process myoblast differentiation localization regulation of localization regulation of biological process protein localization to cell surface regulation of protein localization macromolecule localization biological regulation regulation of protein localization to cell surface intracellular protein localization multicellular organismal process system process nervous system process neuromuscular process regulation of potassium ion transport regulation of cellular process transport monoatomic ion transmembrane transport potassium ion transmembrane transport regulation of monoatomic ion transmembrane transport metal ion transport monoatomic cation transmembrane transport monoatomic ion transport monoatomic cation transport regulation of metal ion transport regulation of transport regulation of monoatomic ion transport regulation of potassium ion transmembrane transport establishment of localization transmembrane transport regulation of transmembrane transport potassium ion transport regulation of monoatomic cation transmembrane transport hemopoiesis cell development hematopoietic progenitor cell differentiation	postsynaptic specialization membrane postsynaptic specialization synapse membrane plasma membrane postsynaptic density membrane synaptic membrane cell periphery postsynaptic density postsynapse cellular anatomical structure neuron to neuron synapse organelle cell junction postsynaptic specialization membrane postsynaptic specialization synapse membrane plasma membrane postsynaptic density membrane synaptic membrane cell periphery postsynaptic density postsynapse cellular anatomical structure neuron to neuron synapse organelle cell junction postsynaptic membrane asymmetric synapse plasma membrane region axon cell projection main axon juxtaparanode region of axon neuron projection plasma membrane bounded cell projection intracellular anatomical structure cytoplasm cytosol axon initial segment glutamatergic synapse voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex potassium channel complex membrane protein complex cation channel complex transporter complex transmembrane transporter complex monoatomic ion channel complex intracellular organelle cytoskeleton membraneless organelle intracellular membraneless organelle pinceau fiber axon terminus presynapse distal axon neuron projection terminus cytoplasmic side of plasma membrane cytoplasmic side of membrane side of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR005399	Potassium channel, voltage-dependent, beta subunit, KCNAB-related	Family
A, B, C, D	IPR005401	Potassium channel, voltage-dependent, beta subunit, KCNAB2	Family
A, B, C, D	IPR023210	NADP-dependent oxidoreductase domain	Domain
A, B, C, D	IPR005983	Potassium channel, voltage-dependent, beta subunit, KCNAB	Family
A, B, C, D	IPR036812	NAD(P)-dependent oxidoreductase domain 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.