ID   TRPA_DESAH              Reviewed;         253 AA.
AC   C0QMA1;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   05-MAY-2009, sequence version 1.
DT   25-MAY-2022, entry version 67.
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=HRM2_33430;
OS   Desulforapulum autotrophicum (strain ATCC 43914 / DSM 3382 / VKM B-1955 /
OS   HRM2) (Desulfobacterium autotrophicum).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Desulfobacterales;
OC   Desulfobacteraceae; Desulforapulum.
OX   NCBI_TaxID=177437;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 43914 / DSM 3382 / VKM B-1955 / HRM2;
RX   PubMed=19187283; DOI=10.1111/j.1462-2920.2008.01825.x;
RA   Strittmatter A.W., Liesegang H., Rabus R., Decker I., Amann J., Andres S.,
RA   Henne A., Fricke W.F., Martinez-Arias R., Bartels D., Goesmann A.,
RA   Krause L., Puehler A., Klenk H.P., Richter M., Schuler M., Gloeckner F.O.,
RA   Meyerdierks A., Gottschalk G., Amann R.;
RT   "Genome sequence of Desulfobacterium autotrophicum HRM2, a marine sulfate
RT   reducer oxidizing organic carbon completely to carbon dioxide.";
RL   Environ. Microbiol. 11:1038-1055(2009).
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; CP001087; ACN16418.1; -; Genomic_DNA.
DR   RefSeq; WP_015905180.1; NC_012108.1.
DR   AlphaFoldDB; C0QMA1; -.
DR   SMR; C0QMA1; -.
DR   STRING; 177437.HRM2_33430; -.
DR   EnsemblBacteria; ACN16418; ACN16418; HRM2_33430.
DR   KEGG; dat:HRM2_33430; -.
DR   eggNOG; COG0159; Bacteria.
DR   HOGENOM; CLU_016734_0_0_7; -.
DR   OMA; LVMTYWN; -.
DR   OrthoDB; 912786at2; -.
DR   UniPathway; UPA00035; UER00044.
DR   Proteomes; UP000000442; 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..253
FT                   /note="Tryptophan synthase alpha chain"
FT                   /id="PRO_1000203177"
FT   ACT_SITE        47
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00131"
FT   ACT_SITE        58
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00131"
SQ   SEQUENCE   253 AA;  28167 MW;  D4083EF7DD45C962 CRC64;
     MLEAYIRERR RQKEILLMTH IVMGYPDFET SMAIVEQMVE AGVDLMELQI PFSEPMADGP
     VILGANQAAL SGGARVERCF EFARQAAAKF DIPFLFMTYY NILFKYGVTP FVNKMADINI
     KGAIVPDLPP EEGQAYLKAM EEQNLSPIHI FSPRTSNERM DFLASQTRGF VYCVARKGVT
     GKETRFTEEI AGYLDRCRQA TTLPLAVGFG VKDEADIAFL KGKADIAVVG SEMIRVVENQ
     GVEGVGRFIQ SLA