2AR8

The structure of tryptophan 7-halogenase (PrnA)suggests a mechanism for regioselective chlorination

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Trp_halogenase_C	e2ar8A1	A: a+b two layers	X: FAD-linked reductases, C-terminal domain-like	H: FAD-linked reductases-C (From Topology)	T: FAD-linked reductases-C	F: Trp_halogenase_C	ECOD (1.6)
A	DAO_1st	e2ar8A2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: FAD/NAD(P)-binding domain	F: DAO_1st	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.50.50.60	Alpha Beta	3-Layer(bba) Sandwich	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF04820	Tryptophan halogenase (Trp_halogenase)	Tryptophan halogenase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	tryptophan halogenase PrnA	monooxygenase activity oxidoreductase activity catalytic activity binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding	antibiotic metabolic process biosynthetic process metabolic process antibiotic biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036188	FAD/NAD(P)-binding domain superfamily	Homologous Superfamily
A	IPR006905	Flavin-dependent halogenase	Family
A	IPR033856	Flavin-dependent tryptophan halogenase	Family

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	tryptophan 7-halogenase M-CSA #977	Tryptophan 7-halogenase catalyses the chlorination of free tryptophan to 7-chlorotryptophan, which is the first step in the synthesis of the antibiotic pyrrolnitrin. Enzyme-catalysed chlorination of organic compounds in the laboratory remains a challenge, thus understanding the reaction mechanism of tryptophan 7-halogenase is important.	Defined by 2 residues: LYS:A-79GLU:A-346 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif

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.