ID Q2JJD6_SYNJB Unreviewed; 352 AA.
AC Q2JJD6;
DT 07-MAR-2006, integrated into UniProtKB/TrEMBL.
DT 07-MAR-2006, sequence version 1.
DT 27-MAR-2024, entry version 104.
DE RecName: Full=Threonine synthase {ECO:0000256|ARBA:ARBA00018679, ECO:0000256|PIRNR:PIRNR038945};
DE EC=4.2.3.1 {ECO:0000256|ARBA:ARBA00013028, ECO:0000256|PIRNR:PIRNR038945};
GN Name=thrC-1 {ECO:0000313|EMBL:ABD03238.1};
GN OrderedLocusNames=CYB_2298 {ECO:0000313|EMBL:ABD03238.1};
OS Synechococcus sp. (strain JA-2-3B'a(2-13)) (Cyanobacteria bacterium
OS Yellowstone B-Prime).
OC Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales; Synechococcaceae;
OC Synechococcus.
OX NCBI_TaxID=321332 {ECO:0000313|EMBL:ABD03238.1, ECO:0000313|Proteomes:UP000001938};
RN [1] {ECO:0000313|EMBL:ABD03238.1, ECO:0000313|Proteomes:UP000001938}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=JA-2-3B'a(2-13) {ECO:0000313|Proteomes:UP000001938};
RX PubMed=18059494; DOI=10.1038/ismej.2007.46;
RA Bhaya D., Grossman A.R., Steunou A.S., Khuri N., Cohan F.M., Hamamura N.,
RA Melendrez M.C., Bateson M.M., Ward D.M., Heidelberg J.F.;
RT "Population level functional diversity in a microbial community revealed by
RT comparative genomic and metagenomic analyses.";
RL ISME J. 1:703-713(2007).
CC -!- FUNCTION: Catalyzes the gamma-elimination of phosphate from L-
CC phosphohomoserine and the beta-addition of water to produce L-
CC threonine. {ECO:0000256|ARBA:ARBA00003648,
CC ECO:0000256|PIRNR:PIRNR038945}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + O-phospho-L-homoserine = L-threonine + phosphate;
CC Xref=Rhea:RHEA:10840, ChEBI:CHEBI:15377, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:57590, ChEBI:CHEBI:57926; EC=4.2.3.1;
CC Evidence={ECO:0000256|ARBA:ARBA00000051,
CC ECO:0000256|PIRNR:PIRNR038945};
CC -!- COFACTOR:
CC Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC Evidence={ECO:0000256|ARBA:ARBA00001933,
CC ECO:0000256|PIRNR:PIRNR038945, ECO:0000256|PIRSR:PIRSR038945-1};
CC -!- PATHWAY: Amino-acid biosynthesis; L-threonine biosynthesis; L-threonine
CC from L-aspartate: step 5/5. {ECO:0000256|ARBA:ARBA00004979,
CC ECO:0000256|PIRNR:PIRNR038945}.
CC -!- SIMILARITY: Belongs to the threonine synthase family.
CC {ECO:0000256|ARBA:ARBA00005517, ECO:0000256|PIRNR:PIRNR038945}.
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DR EMBL; CP000240; ABD03238.1; -; Genomic_DNA.
DR RefSeq; WP_011433867.1; NC_007776.1.
DR AlphaFoldDB; Q2JJD6; -.
DR STRING; 321332.CYB_2298; -.
DR KEGG; cyb:CYB_2298; -.
DR eggNOG; COG0498; Bacteria.
DR HOGENOM; CLU_028142_0_0_3; -.
DR OrthoDB; 9778118at2; -.
DR UniPathway; UPA00050; UER00065.
DR Proteomes; UP000001938; Chromosome.
DR GO; GO:0030170; F:pyridoxal phosphate binding; IEA:InterPro.
DR GO; GO:0004795; F:threonine synthase activity; IEA:UniProtKB-EC.
DR GO; GO:0009088; P:threonine biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd01563; Thr-synth_1; 1.
DR Gene3D; 3.40.50.1100; -; 2.
DR InterPro; IPR000634; Ser/Thr_deHydtase_PyrdxlP-BS.
DR InterPro; IPR004450; Thr_synthase-like.
DR InterPro; IPR026260; Thr_Synthase_bac/arc.
DR InterPro; IPR001926; TrpB-like_PALP.
DR InterPro; IPR036052; TrpB-like_PALP_sf.
DR NCBIfam; TIGR00260; thrC; 1.
DR PANTHER; PTHR48078:SF6; ACT DOMAIN-CONTAINING PROTEIN; 1.
DR PANTHER; PTHR48078; THREONINE DEHYDRATASE, MITOCHONDRIAL-RELATED; 1.
DR Pfam; PF00291; PALP; 1.
DR PIRSF; PIRSF038945; Thr_synthase; 1.
DR SUPFAM; SSF53686; Tryptophan synthase beta subunit-like PLP-dependent enzymes; 1.
DR PROSITE; PS00165; DEHYDRATASE_SER_THR; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605,
KW ECO:0000256|PIRNR:PIRNR038945};
KW Lyase {ECO:0000256|PIRNR:PIRNR038945, ECO:0000313|EMBL:ABD03238.1};
KW Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898,
KW ECO:0000256|PIRNR:PIRNR038945};
KW Reference proteome {ECO:0000313|Proteomes:UP000001938};
KW Threonine biosynthesis {ECO:0000256|ARBA:ARBA00022697,
KW ECO:0000256|PIRNR:PIRNR038945}.
FT DOMAIN 24..318
FT /note="Tryptophan synthase beta chain-like PALP"
FT /evidence="ECO:0000259|Pfam:PF00291"
FT BINDING 89
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000256|PIRSR:PIRSR038945-1"
FT BINDING 189..193
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000256|PIRSR:PIRSR038945-1"
FT BINDING 317
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000256|PIRSR:PIRSR038945-1"
FT MOD_RES 63
FT /note="N6-(pyridoxal phosphate)lysine"
FT /evidence="ECO:0000256|PIRSR:PIRSR038945-2"
SQ SEQUENCE 352 AA; 37150 MW; 898034FB8BB149BE CRC64;
MGLWPGLIQH YREWLPVSAS TPVVTLHEGN TPLVPSPALS QRLGRDCQVY LKLEGLNPTG
SFKDRGMTMA VSKAKEAGAE AIICASTGNT SAAAAAFAAK GGLRAYVLIP DGYVAKGKLA
QTLMYGAEII AVQGNFDQAL AMVRQLAETY PVALVNSVNR FRLEGQKTAA FEVVDALGDA
PDWLCIPVGN AGNITAYWMG FCQYRQQGKA TRRPRLYGFE AAGAAPMVLN RVVEHPETVA
TAIRIGNPAS WVKAKAAVQV SGGQVDSVTD EEILAAYRLL ASEEGIFCEP ASAASVAGLL
KWREQVPAGA QVVCVLTGNG LKDPDTASHQ GSAPIHTGVV PELSAVARLM GF
//
