KEGG   ENZYME: 1.14.15.41
Entry
EC 1.14.15.41               Enzyme                                 
Name
L-tryptophan 4-nitrase;
txtE (gene name);
4-nitro-L-tryptophane synthase
Class
Oxidoreductases;
Acting on paired donors, with incorporation or reduction of molecular oxygen;
With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen into the other donor
Sysname
L-tryptophan,nitric oxide, reduced ferredoxin:oxygen oxidoreductase (4-nitro-L-tryptophan-forming)
Reaction(IUBMB)
L-tryptophan + nitric oxide + O2 + reduced ferredoxin + H+ = 4-nitro-L-tryptophan + H2O + oxidized ferredoxin [RN:R13417]
Reaction(KEGG)
R13417
Substrate
L-tryptophan [CPD:C00078];
nitric oxide [CPD:C00533];
O2 [CPD:C00007];
reduced ferredoxin [CPD:C00138];
H+ [CPD:C00080]
Product
4-nitro-L-tryptophan [CPD:C22980];
H2O [CPD:C00001];
oxidized ferredoxin [CPD:C00139]
Comment
A cytochrome P-450 (heme-thiolate) enzyme characterized from the bacterium Streptomyces turgidiscabies. The enzyme participates in biosynthesis of thaxtomins, cyclic dipeptides formed from the condensation of 4-nitro-L-tryptophan and L-phenylalanine that have phytotoxic properties. The enzyme requires ferredoxin as its electron donor and catalyses a reaction in which nitric oxide is oxidized to a nitro group and inserted into L-tryptophan at the 4 position (not necessarily in this order).
History
EC 1.14.15.41 created 2024
Orthology
K28016  L-tryptophan 4-nitrase
Genes
SCBSCAB_31831
STRMM444_05165
SCAEIHE65_14915(txtE)
SGKPET44_03735(txtE)
AMYZHUW46_07575(bioI_3)
Reference
1  [PMID:22941045]
  Authors
Barry SM, Kers JA, Johnson EG, Song L, Aston PR, Patel B, Krasnoff SB, Crane BR, Gibson DM, Loria R, Challis GL.
  Title
Cytochrome P450-catalyzed L-tryptophan nitration in thaxtomin phytotoxin biosynthesis.
  Journal
Nat Chem Biol 8:814-6 (2012)
DOI:10.1038/nchembio.1048
Other DBs
ExplorEnz - The Enzyme Database: 1.14.15.41
IUBMB Enzyme Nomenclature: 1.14.15.41
ExPASy - ENZYME nomenclature database: 1.14.15.41
BRENDA, the Enzyme Database: 1.14.15.41

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