2ISK

BluB bound to flavin anion (charge transfer complex)

External Resource: Annotation

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: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	FMN-dependent nitroreductase-like	8060426	3001947	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	Nitroreductase	e2iskB1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
G	Nitroreductase	e2iskG1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
H	Nitroreductase	e2iskH1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
A	Nitroreductase	e2iskA1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
C	Nitroreductase	e2iskC1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
D	Nitroreductase	e2iskD1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
E	Nitroreductase	e2iskE1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)
F	Nitroreductase	e2iskF1	A: a+b two layers	X: Alpha-beta plaits	H: FMN-dependent nitroreductase-like (From Topology)	T: FMN-dependent nitroreductase-like	F: Nitroreductase	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
G	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
H	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
A	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
C	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
D	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
E	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)
F	3.40.109.10	Alpha Beta	3-Layer(aba) Sandwich	NADH Oxidase	NADH Oxidase	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H	PF00881	Nitroreductase family (Nitroreductase)	Nitroreductase family	The nitroreductase family comprises a group of FMN- or FAD-dependent and NAD(P)H-dependent enzymes able to metabolize nitrosubstituted compounds.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H	BluB	oxidoreductase activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen catalytic activity oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen 5,6-dimethylbenzimidazole synthase activity oxidoreductase activity, acting on single donors with incorporation of molecular oxygen dioxygenase activity binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding	cobalamin metabolic process cobalamin biosynthetic process water-soluble vitamin biosynthetic process organonitrogen compound metabolic process tetrapyrrole metabolic process small molecule biosynthetic process cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process vitamin biosynthetic process vitamin metabolic process organic cyclic compound metabolic process organic substance metabolic process tetrapyrrole biosynthetic process biosynthetic process cobalamin metabolic process cobalamin biosynthetic process water-soluble vitamin biosynthetic process organonitrogen compound metabolic process tetrapyrrole metabolic process small molecule biosynthetic process cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process vitamin biosynthetic process vitamin metabolic process organic cyclic compound metabolic process organic substance metabolic process tetrapyrrole biosynthetic process biosynthetic process organic cyclic compound biosynthetic process organic substance biosynthetic process small molecule metabolic process metabolic process cellular process water-soluble vitamin metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H	IPR029479	Nitroreductase	Domain
A, B, C, D, E A, B, C, D, E, F, G, H	IPR012825	5,6-dimethylbenzimidazole synthase BluB	Family
A, B, C, D, E A, B, C, D, E, F, G, H	IPR000415	Nitroreductase-like	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.