Annotations: 4HKA

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Bacterial tryptophan 2 3-dioxygenase-like	8087368	4001603	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	indolic compounds 2 3-dioxygenase-like	8087369	3001961	SCOP2 (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	Trp_dioxygenase	e4hkaA1	A: alpha bundles	X: Indolic compounds 2,3-dioxygenase-like (From Topology)	H: Indolic compounds 2,3-dioxygenase-like (From Topology)	T: Indolic compounds 2,3-dioxygenase-like	F: Trp_dioxygenase	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.58.480	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
A	1.10.287.3810	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF03301	Tryptophan 2,3-dioxygenase (Trp_dioxygenase)	Tryptophan 2,3-dioxygenase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Tryptophan 2,3-dioxygenase	oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen tryptophan 2,3-dioxygenase activity oxidoreductase activity oxidoreductase activity, acting on single donors with incorporation of molecular oxygen catalytic activity dioxygenase activity binding organic cyclic compound binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular process cellular component organization or biogenesis catabolic process oxoacid metabolic process aromatic amino acid family catabolic process protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular process cellular component organization or biogenesis catabolic process oxoacid metabolic process aromatic amino acid family catabolic process indole-containing compound metabolic process amino acid metabolic process organic acid catabolic process organic acid metabolic process alpha-amino acid metabolic process cellular catabolic process non-proteinogenic amino acid metabolic process organic substance metabolic process cellular ketone metabolic process carboxylic acid catabolic process indolalkylamine metabolic process small molecule metabolic process amino acid catabolic process organonitrogen compound catabolic process organonitrogen compound metabolic process aromatic amino acid metabolic process benzene-containing compound metabolic process cellular metabolic process carboxylic acid metabolic process primary metabolic process organic cyclic compound catabolic process tryptophan metabolic process organic cyclic compound metabolic process amine metabolic process kynurenine metabolic process tryptophan catabolic process to kynurenine alpha-amino acid catabolic process indole-containing compound catabolic process tryptophan catabolic process metabolic process small molecule catabolic process organic substance catabolic process biogenic amine metabolic process nucleoside bisphosphate metabolic process carbohydrate derivative metabolic process acetyl-CoA metabolic process nucleobase-containing compound metabolic process amide catabolic process phosphate-containing compound metabolic process sulfur compound metabolic process thioester metabolic process phosphorus metabolic process nucleoside phosphate metabolic process nucleotide metabolic process tryptophan catabolic process to acetyl-CoA purine ribonucleotide metabolic process ribose phosphate metabolic process purine nucleoside bisphosphate metabolic process ribonucleoside bisphosphate metabolic process purine nucleotide metabolic process acyl-CoA metabolic process ribonucleotide metabolic process nucleobase-containing small molecule metabolic process amide metabolic process purine-containing compound metabolic process organophosphate metabolic process pigmentation eye pigmentation developmental pigmentation compound eye pigmentation pigment metabolic process ocellus pigment metabolic process pigment biosynthetic process ocellus pigment biosynthetic process secondary metabolic process pigment metabolic process involved in pigmentation eye pigment metabolic process biosynthetic process secondary metabolite biosynthetic process ocellus pigmentation ommochrome metabolic process pigment metabolic process involved in developmental pigmentation organic cyclic compound biosynthetic process organic substance biosynthetic process eye pigment biosynthetic process ommochrome biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR004981	Tryptophan 2,3-dioxygenase	Family
A	IPR037217	Tryptophan/Indoleamine 2,3-dioxygenase-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.