ID   TYSY_STRS2              Reviewed;         279 AA.
AC   A4W0V3;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   29-MAY-2007, sequence version 1.
DT   27-MAR-2024, entry version 80.
DE   RecName: Full=Thymidylate synthase {ECO:0000255|HAMAP-Rule:MF_00008};
DE            Short=TS {ECO:0000255|HAMAP-Rule:MF_00008};
DE            Short=TSase {ECO:0000255|HAMAP-Rule:MF_00008};
DE            EC=2.1.1.45 {ECO:0000255|HAMAP-Rule:MF_00008};
GN   Name=thyA {ECO:0000255|HAMAP-Rule:MF_00008};
GN   OrderedLocusNames=SSU98_0834;
OS   Streptococcus suis (strain 98HAH33).
OC   Bacteria; Bacillota; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=391296;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=98HAH33;
RX   PubMed=17375201; DOI=10.1371/journal.pone.0000315;
RA   Chen C., Tang J., Dong W., Wang C., Feng Y., Wang J., Zheng F., Pan X.,
RA   Liu D., Li M., Song Y., Zhu X., Sun H., Feng T., Guo Z., Ju A., Ge J.,
RA   Dong Y., Sun W., Jiang Y., Wang J., Yan J., Yang H., Wang X., Gao G.F.,
RA   Yang R., Wang J., Yu J.;
RT   "A glimpse of streptococcal toxic shock syndrome from comparative genomics
RT   of S. suis 2 Chinese isolates.";
RL   PLoS ONE 2:E315-E315(2007).
CC   -!- FUNCTION: Catalyzes the reductive methylation of 2'-deoxyuridine-5'-
CC       monophosphate (dUMP) to 2'-deoxythymidine-5'-monophosphate (dTMP) while
CC       utilizing 5,10-methylenetetrahydrofolate (mTHF) as the methyl donor and
CC       reductant in the reaction, yielding dihydrofolate (DHF) as a by-
CC       product. This enzymatic reaction provides an intracellular de novo
CC       source of dTMP, an essential precursor for DNA biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00008}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + dUMP = 7,8-
CC         dihydrofolate + dTMP; Xref=Rhea:RHEA:12104, ChEBI:CHEBI:15636,
CC         ChEBI:CHEBI:57451, ChEBI:CHEBI:63528, ChEBI:CHEBI:246422;
CC         EC=2.1.1.45; Evidence={ECO:0000255|HAMAP-Rule:MF_00008};
CC   -!- PATHWAY: Pyrimidine metabolism; dTTP biosynthesis. {ECO:0000255|HAMAP-
CC       Rule:MF_00008}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00008}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00008}.
CC   -!- SIMILARITY: Belongs to the thymidylate synthase family. Bacterial-type
CC       ThyA subfamily. {ECO:0000255|HAMAP-Rule:MF_00008}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP000408; ABP91992.1; -; Genomic_DNA.
DR   AlphaFoldDB; A4W0V3; -.
DR   SMR; A4W0V3; -.
DR   KEGG; ssv:SSU98_0834; -.
DR   HOGENOM; CLU_021669_0_0_9; -.
DR   UniPathway; UPA00575; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004799; F:thymidylate synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006231; P:dTMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0006235; P:dTTP biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR   CDD; cd00351; TS_Pyrimidine_HMase; 1.
DR   Gene3D; 3.30.572.10; Thymidylate synthase/dCMP hydroxymethylase domain; 1.
DR   HAMAP; MF_00008; Thymidy_synth_bact; 1.
DR   InterPro; IPR045097; Thymidate_synth/dCMP_Mease.
DR   InterPro; IPR023451; Thymidate_synth/dCMP_Mease_dom.
DR   InterPro; IPR036926; Thymidate_synth/dCMP_Mease_sf.
DR   InterPro; IPR000398; Thymidylate_synthase.
DR   InterPro; IPR020940; Thymidylate_synthase_AS.
DR   PANTHER; PTHR11548; THYMIDYLATE SYNTHASE 1; 1.
DR   PANTHER; PTHR11548:SF1; THYMIDYLATE SYNTHASE-RELATED; 1.
DR   Pfam; PF00303; Thymidylat_synt; 1.
DR   PRINTS; PR00108; THYMDSNTHASE.
DR   SUPFAM; SSF55831; Thymidylate synthase/dCMP hydroxymethylase; 1.
DR   PROSITE; PS00091; THYMIDYLATE_SYNTHASE; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Methyltransferase; Nucleotide biosynthesis; Transferase.
FT   CHAIN           1..279
FT                   /note="Thymidylate synthase"
FT                   /id="PRO_1000000694"
FT   ACT_SITE        154
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
FT   BINDING         133..134
FT                   /ligand="dUMP"
FT                   /ligand_id="ChEBI:CHEBI:246422"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
FT   BINDING         178..181
FT                   /ligand="dUMP"
FT                   /ligand_id="ChEBI:CHEBI:246422"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
FT   BINDING         181
FT                   /ligand="(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:15636"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
FT   BINDING         189
FT                   /ligand="dUMP"
FT                   /ligand_id="ChEBI:CHEBI:246422"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
FT   BINDING         219..221
FT                   /ligand="dUMP"
FT                   /ligand_id="ChEBI:CHEBI:246422"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
FT   BINDING         278
FT                   /ligand="(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:15636"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00008"
SQ   SEQUENCE   279 AA;  32534 MW;  24D235E220A7DE91 CRC64;
     MTKADIIFKE NIRKIMEEGV FSENARPRYK DGNVANSKYV TGAFAEYDLS KGEFPITTLR
     PIPIKSAIKE ILWIYQDQTN DLSVLQEKYG VQYWNDWEVE GTGTIGERYG AIVKKHDIIS
     KILKQLEENP WNRRNVISLW DYEAFDQSAG LLPCAFQTLF DVRRVDGEIY LDATLTQRSN
     DMLVAHHINA MQYVALQMMI AKHFGWKVGK FFYFINNLHI YDNQFEQAEE LLRRTPSEVE
     PRLVLNVPDG TNFFDIRAED FELVDYNPVK PQLKFDLAI
//