4JR9

Crystal structure of nitrate/nitrite exchanger NarK

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth H]	d4jr9h_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth L]	d4jr9l2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth L]	d4jr9l1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	MFS_1_1	e4jr9A1	A: alpha complex topology	X: Major facilitator superfamily (MFS) general substrate transporter (From Topology)	H: Major facilitator superfamily (MFS) general substrate transporter (From Topology)	T: Major facilitator superfamily (MFS) general substrate transporter	F: MFS_1_1	ECOD (1.6)
A	MFS_1_2	e4jr9A2	A: alpha complex topology	X: Major facilitator superfamily (MFS) general substrate transporter (From Topology)	H: Major facilitator superfamily (MFS) general substrate transporter (From Topology)	T: Major facilitator superfamily (MFS) general substrate transporter	F: MFS_1_2	ECOD (1.6)
B [auth H]	V-set_8	e4jr9H2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
B [auth H]	C1-set_1	e4jr9H1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
C [auth L]	C1-set_4	e4jr9L2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
C [auth L]	V-set	e4jr9L1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1250.20	Mainly Alpha	Up-down Bundle	Growth Hormone	Chain: A	CATH (4.3.0)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth H]	IMMUNOGLOBULIN	VH-CH1	Mus musculus (house mouse)	IGHV9-302, IGHV9-3-101, IGHJ401, IGHG2A01, IGHG2A*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-2A_KAPPA	IMGT (202508-0)
C [auth L]	IMMUNOGLOBULIN	L-KAPPA	Mus musculus (house mouse)	IGKV19-9301, IGKV19-9302, IGKJ101, IGKJ102, IGKJ201, IGKC01, IGKC*02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-2A_KAPPA	IMGT (202508-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV9	-	nitrite extrusion protein 1	SAbDab (2025-03-07)
C [auth L]	Light Chain	IGKV19	Kappa	nitrite extrusion protein 1	SAbDab (2025-03-07)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF07690	Major Facilitator Superfamily (MFS_1)	Major Facilitator Superfamily	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Nitrite extrusion protein 1	antiporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity transporter activity transmembrane transporter activity inorganic anion transmembrane transporter activity solute:inorganic anion antiporter activity secondary active transmembrane transporter activity nitrite transmembrane transporter activity nitrate transmembrane transporter activity	nitrate assimilation nitrogen cycle metabolic process oxoacid metabolic process metabolic process cellular process small molecule metabolic process organic acid metabolic process nitrate metabolic process reactive nitrogen species metabolic process catabolic process nitrate catabolic process localization nitrogen compound transport transport nitrate assimilation nitrogen cycle metabolic process oxoacid metabolic process metabolic process cellular process small molecule metabolic process organic acid metabolic process nitrate metabolic process reactive nitrogen species metabolic process catabolic process nitrate catabolic process localization nitrogen compound transport transport establishment of localization nitrite transport inorganic anion transport nitrate transmembrane transport inorganic ion transmembrane transport nitrate import inorganic anion transmembrane transport transmembrane transport	cell periphery cellular anatomical structure plasma membrane membrane
B [auth H]	Immunoglobulin Gamma-2a, Heavy chain	-	-	-
C [auth L]	Immunoglobulin Kappa, Light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR044772	Nitrate transporter	Family
A	IPR004737	Nitrate transporter NarK/NarU-like	Family
A	IPR011701	Major facilitator superfamily	Family
A	IPR036259	MFS transporter superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Transmembrane	Alpha-helical polytopic	Major Facilitator Superfamily (MFS)	Nitrate/nitrite porter

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Major Facilitator Superfamily (MFS) Transporters	NarK nitrate/nitrite exchanger

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.