ID   TRPA_POLSJ              Reviewed;         272 AA.
AC   Q126M0;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   22-AUG-2006, sequence version 1.
DT   25-MAY-2022, entry version 83.
DE   RecName: Full=Tryptophan synthase alpha chain {ECO:0000255|HAMAP-Rule:MF_00131};
DE            EC=4.2.1.20 {ECO:0000255|HAMAP-Rule:MF_00131};
GN   Name=trpA {ECO:0000255|HAMAP-Rule:MF_00131}; OrderedLocusNames=Bpro_3617;
OS   Polaromonas sp. (strain JS666 / ATCC BAA-500).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC   Comamonadaceae; Polaromonas; unclassified Polaromonas.
OX   NCBI_TaxID=296591;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=JS666 / ATCC BAA-500;
RX   PubMed=18723656; DOI=10.1128/aem.00197-08;
RA   Mattes T.E., Alexander A.K., Richardson P.M., Munk A.C., Han C.S.,
RA   Stothard P., Coleman N.V.;
RT   "The genome of Polaromonas sp. strain JS666: insights into the evolution of
RT   a hydrocarbon- and xenobiotic-degrading bacterium, and features of
RT   relevance to biotechnology.";
RL   Appl. Environ. Microbiol. 74:6405-6416(2008).
CC   -!- FUNCTION: The alpha subunit is responsible for the aldol cleavage of
CC       indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate.
CC       {ECO:0000255|HAMAP-Rule:MF_00131}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(1S,2R)-1-C-(indol-3-yl)glycerol 3-phosphate + L-serine = D-
CC         glyceraldehyde 3-phosphate + H2O + L-tryptophan;
CC         Xref=Rhea:RHEA:10532, ChEBI:CHEBI:15377, ChEBI:CHEBI:33384,
CC         ChEBI:CHEBI:57912, ChEBI:CHEBI:58866, ChEBI:CHEBI:59776; EC=4.2.1.20;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00131};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-tryptophan biosynthesis; L-
CC       tryptophan from chorismate: step 5/5. {ECO:0000255|HAMAP-
CC       Rule:MF_00131}.
CC   -!- SUBUNIT: Tetramer of two alpha and two beta chains. {ECO:0000255|HAMAP-
CC       Rule:MF_00131}.
CC   -!- SIMILARITY: Belongs to the TrpA family. {ECO:0000255|HAMAP-
CC       Rule:MF_00131}.
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DR   EMBL; CP000316; ABE45522.1; -; Genomic_DNA.
DR   RefSeq; WP_011484516.1; NC_007948.1.
DR   AlphaFoldDB; Q126M0; -.
DR   SMR; Q126M0; -.
DR   STRING; 296591.Bpro_3617; -.
DR   EnsemblBacteria; ABE45522; ABE45522; Bpro_3617.
DR   KEGG; pol:Bpro_3617; -.
DR   eggNOG; COG0159; Bacteria.
DR   HOGENOM; CLU_016734_0_0_4; -.
DR   OMA; LVMTYWN; -.
DR   OrthoDB; 912786at2; -.
DR   UniPathway; UPA00035; UER00044.
DR   Proteomes; UP000001983; Chromosome.
DR   GO; GO:0004834; F:tryptophan synthase activity; IEA:UniProtKB-UniRule.
DR   CDD; cd04724; Tryptophan_synthase_alpha; 1.
DR   Gene3D; 3.20.20.70; -; 1.
DR   HAMAP; MF_00131; Trp_synth_alpha; 1.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR011060; RibuloseP-bd_barrel.
DR   InterPro; IPR002028; Trp_synthase_suA.
DR   PANTHER; PTHR43406; PTHR43406; 1.
DR   Pfam; PF00290; Trp_syntA; 1.
DR   SUPFAM; SSF51366; SSF51366; 1.
DR   TIGRFAMs; TIGR00262; trpA; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Aromatic amino acid biosynthesis; Lyase;
KW   Reference proteome; Tryptophan biosynthesis.
FT   CHAIN           1..272
FT                   /note="Tryptophan synthase alpha chain"
FT                   /id="PRO_1000018248"
FT   ACT_SITE        49
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00131"
FT   ACT_SITE        60
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00131"
SQ   SEQUENCE   272 AA;  28779 MW;  E0BB3A6997ABA2E3 CRC64;
     MSRIASTFSA LKSQGRKALI PYVTAGFPFA DITPELMHSM VAGGADVIEL GVPFSDPSAD
     GPVIQKAGEK ALALGIGLAQ VLEMVRVFRQ KDGTTPVVLM GYANPVERYD IKHGGSATES
     AFIRDAAQAG VDGVLIVDYP PEECVEFAAR LRAHNMDLIF LLAPTSTSAR MAQVAEVASG
     YVYYVSLKGV TGAGTLDVDA VEAMLPRIRQ HVKVPVGVGF GIRDAATAKA IGKVADAVVI
     GSKIIQLIEN QPRDKVATVA RDFLKEIRAA LD