ID   TRPA_SULMW              Reviewed;         251 AA.
AC   A8Z5Y2;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   15-JAN-2008, sequence version 1.
DT   25-MAY-2022, entry version 75.
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=SMGWSS_121;
OS   Sulcia muelleri (strain GWSS).
OC   Bacteria; Bacteroidetes; Flavobacteriia; Flavobacteriales;
OC   Candidatus Sulcia.
OX   NCBI_TaxID=444179;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=GWSS;
RX   PubMed=18048332; DOI=10.1073/pnas.0708855104;
RA   McCutcheon J.P., Moran N.A.;
RT   "Parallel genomic evolution and metabolic interdependence in an ancient
RT   symbiosis.";
RL   Proc. Natl. Acad. Sci. U.S.A. 104:19392-19397(2007).
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; CP000770; ABS30533.1; -; Genomic_DNA.
DR   AlphaFoldDB; A8Z5Y2; -.
DR   SMR; A8Z5Y2; -.
DR   STRING; 444179.SMGWSS_121; -.
DR   EnsemblBacteria; ABS30533; ABS30533; SMGWSS_121.
DR   KEGG; smg:SMGWSS_121; -.
DR   HOGENOM; CLU_016734_0_0_10; -.
DR   OMA; LVMTYWN; -.
DR   UniPathway; UPA00035; UER00044.
DR   Proteomes; UP000000781; 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; IPR018204; Trp_synthase_alpha_AS.
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.
DR   PROSITE; PS00167; TRP_SYNTHASE_ALPHA; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Aromatic amino acid biosynthesis; Lyase;
KW   Reference proteome; Tryptophan biosynthesis.
FT   CHAIN           1..251
FT                   /note="Tryptophan synthase alpha chain"
FT                   /id="PRO_1000076374"
FT   ACT_SITE        46
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00131"
FT   ACT_SITE        57
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00131"
SQ   SEQUENCE   251 AA;  28773 MW;  311E040FA806FA7E CRC64;
     MNKIKRLFIN KKKNILNIYF TAGYPSIDSM PLILKRLQNL NIDIVEIGIP YSDPLADGNI
     IQKSNTKSLK NGMNISVLFY KLKKVKKYIN IPIILMGYYN QFIKYGEIKF LEDCIESGVS
     GLILPDLPPR IYLNKYKKIF KKSKLAFIVL ITPQTSLKRL KRLSSITDYF LYIVSSNSTT
     GTKNNINLSF LERIKEINVP KLIGFGICDK KSLNIAFKYA EGAIIGSAFI KAIKKSYLEK
     SIEKFIKYII K