ID   T23O_STRMK              Reviewed;         291 AA.
AC   B2FKN7;
DT   20-JAN-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-JUN-2008, sequence version 1.
DT   03-AUG-2022, entry version 66.
DE   RecName: Full=Tryptophan 2,3-dioxygenase {ECO:0000255|HAMAP-Rule:MF_01972};
DE            Short=TDO {ECO:0000255|HAMAP-Rule:MF_01972};
DE            EC=1.13.11.11 {ECO:0000255|HAMAP-Rule:MF_01972};
DE   AltName: Full=Tryptamin 2,3-dioxygenase {ECO:0000255|HAMAP-Rule:MF_01972};
DE   AltName: Full=Tryptophan oxygenase {ECO:0000255|HAMAP-Rule:MF_01972};
DE            Short=TO {ECO:0000255|HAMAP-Rule:MF_01972};
DE            Short=TRPO {ECO:0000255|HAMAP-Rule:MF_01972};
DE   AltName: Full=Tryptophan pyrrolase {ECO:0000255|HAMAP-Rule:MF_01972};
DE   AltName: Full=Tryptophanase {ECO:0000255|HAMAP-Rule:MF_01972};
GN   Name=kynA {ECO:0000255|HAMAP-Rule:MF_01972}; OrderedLocusNames=Smlt4336;
OS   Stenotrophomonas maltophilia (strain K279a).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Xanthomonadales;
OC   Xanthomonadaceae; Stenotrophomonas; Stenotrophomonas maltophilia group.
OX   NCBI_TaxID=522373;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=K279a;
RX   PubMed=18419807; DOI=10.1186/gb-2008-9-4-r74;
RA   Crossman L.C., Gould V.C., Dow J.M., Vernikos G.S., Okazaki A.,
RA   Sebaihia M., Saunders D., Arrowsmith C., Carver T., Peters N., Adlem E.,
RA   Kerhornou A., Lord A., Murphy L., Seeger K., Squares R., Rutter S.,
RA   Quail M.A., Rajandream M.A., Harris D., Churcher C., Bentley S.D.,
RA   Parkhill J., Thomson N.R., Avison M.B.;
RT   "The complete genome, comparative and functional analysis of
RT   Stenotrophomonas maltophilia reveals an organism heavily shielded by drug
RT   resistance determinants.";
RL   Genome Biol. 9:R74.1-R74.13(2008).
CC   -!- FUNCTION: Heme-dependent dioxygenase that catalyzes the oxidative
CC       cleavage of the L-tryptophan (L-Trp) pyrrole ring and converts L-
CC       tryptophan to N-formyl-L-kynurenine. Catalyzes the oxidative cleavage
CC       of the indole moiety. {ECO:0000255|HAMAP-Rule:MF_01972}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-tryptophan + O2 = N-formyl-L-kynurenine;
CC         Xref=Rhea:RHEA:24536, ChEBI:CHEBI:15379, ChEBI:CHEBI:57912,
CC         ChEBI:CHEBI:58629; EC=1.13.11.11; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01972};
CC   -!- COFACTOR:
CC       Name=heme; Xref=ChEBI:CHEBI:30413;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01972};
CC       Note=Binds 1 heme group per subunit. {ECO:0000255|HAMAP-Rule:MF_01972};
CC   -!- PATHWAY: Amino-acid degradation; L-tryptophan degradation via
CC       kynurenine pathway; L-kynurenine from L-tryptophan: step 1/2.
CC       {ECO:0000255|HAMAP-Rule:MF_01972}.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_01972}.
CC   -!- SIMILARITY: Belongs to the tryptophan 2,3-dioxygenase family.
CC       {ECO:0000255|HAMAP-Rule:MF_01972}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; AM743169; CAQ47720.1; -; Genomic_DNA.
DR   RefSeq; WP_005414712.1; NC_010943.1.
DR   AlphaFoldDB; B2FKN7; -.
DR   SMR; B2FKN7; -.
DR   STRING; 522373.Smlt4336; -.
DR   EnsemblBacteria; CAQ47720; CAQ47720; Smlt4336.
DR   KEGG; sml:Smlt4336; -.
DR   eggNOG; COG3483; Bacteria.
DR   HOGENOM; CLU_063240_0_0_6; -.
DR   OMA; WRWRNDH; -.
DR   OrthoDB; 1660023at2; -.
DR   UniPathway; UPA00333; UER00453.
DR   Proteomes; UP000008840; Chromosome.
DR   GO; GO:0020037; F:heme binding; ISS:UniProtKB.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0004833; F:tryptophan 2,3-dioxygenase activity; ISS:UniProtKB.
DR   GO; GO:0019441; P:tryptophan catabolic process to kynurenine; ISS:UniProtKB.
DR   HAMAP; MF_01972; T23O; 1.
DR   InterPro; IPR037217; Trp/Indoleamine_2_3_dOase-like.
DR   InterPro; IPR004981; Trp_2_3_dOase.
DR   PANTHER; PTHR10138; PTHR10138; 2.
DR   Pfam; PF03301; Trp_dioxygenase; 2.
DR   SUPFAM; SSF140959; SSF140959; 1.
PE   3: Inferred from homology;
KW   Dioxygenase; Heme; Iron; Metal-binding; Oxidoreductase; Reference proteome;
KW   Tryptophan catabolism.
FT   CHAIN           1..291
FT                   /note="Tryptophan 2,3-dioxygenase"
FT                   /id="PRO_0000360138"
FT   BINDING         51..55
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01972"
FT   BINDING         113
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01972"
FT   BINDING         117
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01972"
FT   BINDING         240
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01972"
FT   BINDING         254
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01972"
SQ   SEQUENCE   291 AA;  33574 MW;  B5DFEB3A5A9DC13E CRC64;
     MSVDNNQRDL EAGIHTDLQG RLTYGGYLRL DQLLSAQQPL SSPPHHDEML FIIQHQTSEL
     WLKLLGHELR AAIGFLQRDE VWQCRKVLAR SKQVLRQLTE QWSVLETLTP SEYMGFRDVL
     GPSSGFQSLQ YRYIEFLLGN KNAQMLQVFE HDPAGQAQLR TVLEAPSLYE EFLKYLARFG
     HAVPAVYEAH DWTQPHVADD ALQPVFERIY QDTDRYWREY ALCEDLVDLE TAFQLWRFRH
     MRTVMRVIGF KRGTGGSSGV GFLAKALELT FFPELFQVRT SLQAAPPAEQ A