ID   TRPB_FRATH              Reviewed;         396 AA.
AC   Q2A5V3;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   04-APR-2006, sequence version 1.
DT   25-MAY-2022, entry version 94.
DE   RecName: Full=Tryptophan synthase beta chain {ECO:0000255|HAMAP-Rule:MF_00133};
DE            EC=4.2.1.20 {ECO:0000255|HAMAP-Rule:MF_00133};
GN   Name=trpB {ECO:0000255|HAMAP-Rule:MF_00133}; OrderedLocusNames=FTL_0099;
OS   Francisella tularensis subsp. holarctica (strain LVS).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Thiotrichales;
OC   Francisellaceae; Francisella.
OX   NCBI_TaxID=376619;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=LVS;
RA   Chain P., Larimer F., Land M., Stilwagen S., Larsson P., Bearden S.,
RA   Chu M., Oyston P., Forsman M., Andersson S., Lindler L., Titball R.,
RA   Garcia E.;
RT   "Complete genome sequence of Francisella tularensis LVS (Live Vaccine
RT   Strain).";
RL   Submitted (MAR-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: The beta subunit is responsible for the synthesis of L-
CC       tryptophan from indole and L-serine. {ECO:0000255|HAMAP-Rule:MF_00133}.
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_00133};
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00133};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-tryptophan biosynthesis; L-
CC       tryptophan from chorismate: step 5/5. {ECO:0000255|HAMAP-
CC       Rule:MF_00133}.
CC   -!- SUBUNIT: Tetramer of two alpha and two beta chains. {ECO:0000255|HAMAP-
CC       Rule:MF_00133}.
CC   -!- SIMILARITY: Belongs to the TrpB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00133}.
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DR   EMBL; AM233362; CAJ78540.1; -; Genomic_DNA.
DR   RefSeq; WP_003014081.1; NZ_CP009694.1.
DR   AlphaFoldDB; Q2A5V3; -.
DR   SMR; Q2A5V3; -.
DR   KEGG; ftl:FTL_0099; -.
DR   OMA; HGMKSYF; -.
DR   UniPathway; UPA00035; UER00044.
DR   GO; GO:0004834; F:tryptophan synthase activity; IEA:UniProtKB-UniRule.
DR   CDD; cd06446; Trp-synth_B; 1.
DR   Gene3D; 3.40.50.1100; -; 2.
DR   HAMAP; MF_00133; Trp_synth_beta; 1.
DR   InterPro; IPR001926; PLP-dep.
DR   InterPro; IPR006653; Trp_synth_b_CS.
DR   InterPro; IPR006654; Trp_synth_beta.
DR   InterPro; IPR023026; Trp_synth_beta/beta-like.
DR   InterPro; IPR036052; Trypto_synt_PLP_dependent.
DR   Pfam; PF00291; PALP; 1.
DR   PIRSF; PIRSF001413; Trp_syn_beta; 1.
DR   SUPFAM; SSF53686; SSF53686; 1.
DR   TIGRFAMs; TIGR00263; trpB; 1.
DR   PROSITE; PS00168; TRP_SYNTHASE_BETA; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Aromatic amino acid biosynthesis; Lyase;
KW   Pyridoxal phosphate; Tryptophan biosynthesis.
FT   CHAIN           1..396
FT                   /note="Tryptophan synthase beta chain"
FT                   /id="PRO_1000018342"
FT   MOD_RES         86
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00133"
SQ   SEQUENCE   396 AA;  43107 MW;  281261027D192A1B CRC64;
     MSKLNAYFGE YGGQFVPQIL VPALDQLEQE FIKAQADESF KQEFKELLQE YAGRPTALTK
     TRNIVKNTRT KLYLKREDLL HGGAHKTNQV LGQALLVKRM GKKEIIAETG AGQHGVATAL
     ACALLDLKCR VYMGAKDVER QSPNVFRMKL MGAEVIPVHS GSATLKDACN EALRDWSANY
     SKAHYLLGTA AGPHPFPTIV REFQRMIGEE TKQQMLAKEG RLPDAVIACV GGGSNAIGMF
     ADFIDEKNVK LIGVEPAGKG IETGEHGAPL KHGKTGIFFG MKAPLMQNSD GQIEESYSIS
     AGLDFPSVGP QHAHLLAIGR AKYASATDDE ALDAFKLLCK KEGIIPALES SHALAHALKL
     AYEDPNKEQL LVVNLSGRGD KDIFTVHDIL KEKGEI