1CQX | pdb_00001cqx

Crystal structure of the flavohemoglobin from Alcaligenes eutrophus at 1.75 A resolution

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1cqxa1	All alpha proteins	Globin-like	Globin-like	Globins	Flavohemoglobin, N-terminal domain	(Cupriavidus necator ) [TaxId: 106590 ],	SCOPe (2.08)
A	d1cqxa2	All beta proteins	Reductase/isomerase/elongation factor common domain	Riboflavin synthase domain-like	Ferredoxin reductase FAD-binding domain-like	Flavohemoglobin, central domain	(Cupriavidus necator ) [TaxId: 106590 ],	SCOPe (2.08)
A	d1cqxa3	Alpha and beta proteins (a/b)	Ferredoxin reductase-like, C-terminal NADP-linked domain	Ferredoxin reductase-like, C-terminal NADP-linked domain	Flavohemoglobin, C-terminal domain	Flavohemoglobin, C-terminal domain	(Cupriavidus necator ) [TaxId: 106590 ],	SCOPe (2.08)
B	d1cqxb1	All alpha proteins	Globin-like	Globin-like	Globins	Flavohemoglobin, N-terminal domain	(Cupriavidus necator ) [TaxId: 106590 ],	SCOPe (2.08)
B	d1cqxb2	All beta proteins	Reductase/isomerase/elongation factor common domain	Riboflavin synthase domain-like	Ferredoxin reductase FAD-binding domain-like	Flavohemoglobin, central domain	(Cupriavidus necator ) [TaxId: 106590 ],	SCOPe (2.08)
B	d1cqxb3	Alpha and beta proteins (a/b)	Ferredoxin reductase-like, C-terminal NADP-linked domain	Ferredoxin reductase-like, C-terminal NADP-linked domain	Flavohemoglobin, C-terminal domain	Flavohemoglobin, C-terminal domain	(Cupriavidus necator ) [TaxId: 106590 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Globins	8023873	4000551	SCOP2 (2022-06-29)
A	SCOP2 Family	Ferredoxin reductase FAD-binding domain-like	8029687	4002840	SCOP2 (2022-06-29)
A	SCOP2 Family	Flavohemoglobin, C-terminal domain	8031821	4003804	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Globin-like	8036253	3000554	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Riboflavin synthase domain-like	8042066	3001812	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Ferredoxin reductase-like, C-terminal NADP-linked domain	8044199	3001461	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Riboflavin synthase domain-like	8042066	3001812	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Globin-like	8036253	3000554	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ferredoxin reductase-like, C-terminal NADP-linked domain	8044199	3001461	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)
A		e1cqxA1	A: cradle loop barrel	X: RIFT-related	H: Alanine racemase-C	T: FAD_binding_6	F:	ECOD (20:10:01)
A		e1cqxA2	A: Globin-like	X: Globin-like	H: Globin-like	T: Globin	F:	ECOD (20:10:01)
A		e1cqxA3	A: Ferredoxin reductase-like, C-terminal NADP-linked domain	X: Ferredoxin reductase-like, C-terminal NADP-linked domain	H: Ferredoxin reductase-like, C-terminal NADP-linked domain	T: NAD_binding_1	F:	ECOD (20:10:01)
B		e1cqxB1	A: Cloacin translocation domain	X: Cloacin translocation domain	H: Cloacin translocation domain	T: Trypsin	F:	ECOD (20:10:01)
B		e1cqxB2	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: p53 tetramerization domain	H: p53 tetramerization domain	T: Cation_efflux	F:	ECOD (20:10:01)
B		e1cqxB3	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: Alk_phosphatase	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.490.10	Mainly Alpha	Orthogonal Bundle	Globin-like	Globins	CATH (4.3.0)
A	2.40.30.10	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (4.3.0)
A	3.40.50.80	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module	CATH (4.3.0)
B	1.10.490.10	Mainly Alpha	Orthogonal Bundle	Globin-like	Globins	CATH (4.3.0)
B	2.40.30.10	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (4.3.0)
B	3.40.50.80	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00042	Globin (Globin)	Globin		Domain
A, B	PF00175	Oxidoreductase NAD-binding domain (NAD_binding_1)	Oxidoreductase NAD-binding domain	Xanthine dehydrogenases, that also bind FAD/NAD, have essentially no similarity.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	FLAVOHEMOPROTEIN	oxidoreductase activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen nitric oxide dioxygenase NAD(P)H activity catalytic activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of two atoms of oxygen into one donor dioxygenase activity oxygen binding binding small molecule binding oxygen carrier activity molecular carrier activity FAD binding flavin adenine dinucleotide binding nucleoside phosphate binding oxidoreductase activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen nitric oxide dioxygenase NAD(P)H activity catalytic activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of two atoms of oxygen into one donor dioxygenase activity oxygen binding binding small molecule binding oxygen carrier activity molecular carrier activity FAD binding flavin adenine dinucleotide binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding tetrapyrrole binding heme binding cation binding metal ion binding	nitric oxide metabolic process catabolic process nitric oxide catabolic process metabolic process cellular process reactive nitrogen species metabolic process response to stimulus response to chemical response to toxic substance cellular response to stimulus cellular response to chemical stimulus response to nitrosative stress cellular response to stress response to stress nitric oxide metabolic process catabolic process nitric oxide catabolic process metabolic process cellular process reactive nitrogen species metabolic process response to stimulus response to chemical response to toxic substance cellular response to stimulus cellular response to chemical stimulus response to nitrosative stress cellular response to stress response to stress cellular response to nitrosative stress cellular response to chemical stress	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR001433	Oxidoreductase FAD/NAD(P)-binding	Domain
A, B	IPR023950	Flavohemoprotein	Family
A, B	IPR009050	Globin-like superfamily	Homologous Superfamily
A, B	IPR012292	Globin/Protoglobin	Homologous Superfamily
A, B	IPR039261	Ferredoxin-NADP reductase (FNR), nucleotide-binding domain	Homologous Superfamily
A, B	IPR017938	Riboflavin synthase-like beta-barrel	Homologous Superfamily
A, B	IPR017927	FAD-binding domain, ferredoxin reductase-type	Domain
A, B	IPR000971	Globin	Domain

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.