ID   A4APG3_MARSH            Unreviewed;       214 AA.
AC   A4APG3;
DT   03-APR-2007, integrated into UniProtKB/TrEMBL.
DT   03-APR-2007, sequence version 1.
DT   27-MAR-2024, entry version 89.
DE   RecName: Full=Thymidine kinase {ECO:0000256|ARBA:ARBA00012118, ECO:0000256|HAMAP-Rule:MF_00124};
DE            EC=2.7.1.21 {ECO:0000256|ARBA:ARBA00012118, ECO:0000256|HAMAP-Rule:MF_00124};
GN   Name=tdk {ECO:0000256|HAMAP-Rule:MF_00124};
GN   OrderedLocusNames=FB2170_06340 {ECO:0000313|EMBL:EAR02885.1};
OS   Maribacter sp. (strain HTCC2170 / KCCM 42371).
OC   Bacteria; Bacteroidota; Flavobacteriia; Flavobacteriales;
OC   Flavobacteriaceae; Maribacter.
OX   NCBI_TaxID=313603 {ECO:0000313|EMBL:EAR02885.1, ECO:0000313|Proteomes:UP000001602};
RN   [1] {ECO:0000313|EMBL:EAR02885.1, ECO:0000313|Proteomes:UP000001602}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HTCC2170 / KCCM 42371 {ECO:0000313|Proteomes:UP000001602};
RX   PubMed=21037013; DOI=10.1128/JB.01207-10;
RA   Oh H.M., Kang I., Yang S.J., Jang Y., Vergin K.L., Giovannoni S.J.,
RA   Cho J.C.;
RT   "Complete genome sequence of strain HTCC2170, a novel member of the genus
RT   Maribacter in the family Flavobacteriaceae.";
RL   J. Bacteriol. 193:303-304(2011).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + thymidine = ADP + dTMP + H(+); Xref=Rhea:RHEA:19129,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:17748, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:63528, ChEBI:CHEBI:456216; EC=2.7.1.21;
CC         Evidence={ECO:0000256|HAMAP-Rule:MF_00124,
CC         ECO:0000256|RuleBase:RU000544};
CC   -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_00124}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00124}.
CC   -!- SIMILARITY: Belongs to the thymidine kinase family.
CC       {ECO:0000256|ARBA:ARBA00007587, ECO:0000256|HAMAP-Rule:MF_00124,
CC       ECO:0000256|RuleBase:RU004165}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_00124}.
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DR   EMBL; CP002157; EAR02885.1; -; Genomic_DNA.
DR   RefSeq; WP_013305933.1; NC_014472.1.
DR   AlphaFoldDB; A4APG3; -.
DR   STRING; 313603.FB2170_06340; -.
DR   KEGG; fbc:FB2170_06340; -.
DR   eggNOG; COG1435; Bacteria.
DR   HOGENOM; CLU_064400_3_0_10; -.
DR   OrthoDB; 9781579at2; -.
DR   Proteomes; UP000001602; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004797; F:thymidine kinase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0071897; P:DNA biosynthetic process; IEA:UniProtKB-KW.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   Gene3D; 3.30.60.20; -; 1.
DR   Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 1.
DR   HAMAP; MF_00124; Thymidine_kinase; 1.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR001267; Thymidine_kinase.
DR   PANTHER; PTHR11441; THYMIDINE KINASE; 1.
DR   PANTHER; PTHR11441:SF0; THYMIDINE KINASE, CYTOSOLIC; 1.
DR   Pfam; PF00265; TK; 1.
DR   PIRSF; PIRSF035805; TK_cell; 1.
DR   SUPFAM; SSF57716; Glucocorticoid receptor-like (DNA-binding domain); 1.
DR   SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1.
PE   3: Inferred from homology;
KW   ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW   Rule:MF_00124}; Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00124};
KW   DNA synthesis {ECO:0000256|ARBA:ARBA00022634, ECO:0000256|HAMAP-
KW   Rule:MF_00124};
KW   Kinase {ECO:0000256|ARBA:ARBA00022777, ECO:0000256|HAMAP-Rule:MF_00124};
KW   Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW   Rule:MF_00124}; Reference proteome {ECO:0000313|Proteomes:UP000001602};
KW   Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW   Rule:MF_00124}.
FT   ACT_SITE        94
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00124,
FT                   ECO:0000256|PIRSR:PIRSR035805-1"
FT   BINDING         21..28
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00124"
FT   BINDING         93..96
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00124"
SQ   SEQUENCE   214 AA;  24106 MW;  6AD3BB7C42B54ED5 CRC64;
     MFLENTVNHK EQFGWIEVIC GSMFSGKTEE LIRRLKRAQF AKQKVEIFKP MVDKRYHEEM
     VVSHDANEIR STPVPAAANI RILADTCDVI GIDEAQFFDD EIVTVCNDLA NRGVRVIVAG
     LDMDFKGNPF GPMPALMATA EYVTKVHAVC TRTGNLANYS FRKAHNDDLV LLGETGEYEP
     LSRAAYYKAM LKERVKEIDV DVEEISKAKK DVNG
//