ID   KHSE_STRU0              Reviewed;         287 AA.
AC   B9DRZ0;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   24-MAR-2009, sequence version 1.
DT   03-AUG-2022, entry version 72.
DE   RecName: Full=Homoserine kinase {ECO:0000255|HAMAP-Rule:MF_00384};
DE            Short=HK {ECO:0000255|HAMAP-Rule:MF_00384};
DE            Short=HSK {ECO:0000255|HAMAP-Rule:MF_00384};
DE            EC=2.7.1.39 {ECO:0000255|HAMAP-Rule:MF_00384};
GN   Name=thrB {ECO:0000255|HAMAP-Rule:MF_00384}; OrderedLocusNames=SUB0811;
OS   Streptococcus uberis (strain ATCC BAA-854 / 0140J).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=218495;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-854 / 0140J;
RX   PubMed=19175920; DOI=10.1186/1471-2164-10-54;
RA   Ward P.N., Holden M.T.G., Leigh J.A., Lennard N., Bignell A., Barron A.,
RA   Clark L., Quail M.A., Woodward J., Barrell B.G., Egan S.A., Field T.R.,
RA   Maskell D., Kehoe M., Dowson C.G., Chanter N., Whatmore A.M., Bentley S.D.,
RA   Parkhill J.;
RT   "Evidence for niche adaptation in the genome of the bovine pathogen
RT   Streptococcus uberis.";
RL   BMC Genomics 10:54-54(2009).
CC   -!- FUNCTION: Catalyzes the ATP-dependent phosphorylation of L-homoserine
CC       to L-homoserine phosphate. {ECO:0000255|HAMAP-Rule:MF_00384}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-homoserine = ADP + H(+) + O-phospho-L-homoserine;
CC         Xref=Rhea:RHEA:13985, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:57476, ChEBI:CHEBI:57590, ChEBI:CHEBI:456216;
CC         EC=2.7.1.39; Evidence={ECO:0000255|HAMAP-Rule:MF_00384};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-threonine biosynthesis; L-threonine
CC       from L-aspartate: step 4/5. {ECO:0000255|HAMAP-Rule:MF_00384}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00384}.
CC   -!- SIMILARITY: Belongs to the GHMP kinase family. Homoserine kinase
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_00384}.
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DR   EMBL; AM946015; CAR41828.1; -; Genomic_DNA.
DR   RefSeq; WP_012658319.1; NC_012004.1.
DR   AlphaFoldDB; B9DRZ0; -.
DR   SMR; B9DRZ0; -.
DR   STRING; 218495.SUB0811; -.
DR   PRIDE; B9DRZ0; -.
DR   EnsemblBacteria; CAR41828; CAR41828; SUB0811.
DR   KEGG; sub:SUB0811; -.
DR   eggNOG; COG0083; Bacteria.
DR   HOGENOM; CLU_041243_0_0_9; -.
DR   OMA; CANRIPH; -.
DR   OrthoDB; 610857at2; -.
DR   UniPathway; UPA00050; UER00064.
DR   Proteomes; UP000000449; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004413; F:homoserine kinase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   GO; GO:0009088; P:threonine biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.30.230.10; -; 1.
DR   Gene3D; 3.30.70.890; -; 1.
DR   HAMAP; MF_00384; Homoser_kinase; 1.
DR   InterPro; IPR013750; GHMP_kinase_C_dom.
DR   InterPro; IPR036554; GHMP_kinase_C_sf.
DR   InterPro; IPR006204; GHMP_kinase_N_dom.
DR   InterPro; IPR006203; GHMP_knse_ATP-bd_CS.
DR   InterPro; IPR000870; Homoserine_kinase.
DR   InterPro; IPR020568; Ribosomal_S5_D2-typ_fold.
DR   InterPro; IPR014721; Ribosomal_S5_D2-typ_fold_subgr.
DR   Pfam; PF08544; GHMP_kinases_C; 1.
DR   Pfam; PF00288; GHMP_kinases_N; 1.
DR   PIRSF; PIRSF000676; Homoser_kin; 1.
DR   SUPFAM; SSF54211; SSF54211; 1.
DR   SUPFAM; SSF55060; SSF55060; 1.
DR   TIGRFAMs; TIGR00191; thrB; 1.
DR   PROSITE; PS00627; GHMP_KINASES_ATP; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; ATP-binding; Cytoplasm; Kinase;
KW   Nucleotide-binding; Reference proteome; Threonine biosynthesis;
KW   Transferase.
FT   CHAIN           1..287
FT                   /note="Homoserine kinase"
FT                   /id="PRO_1000134264"
FT   BINDING         78..88
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00384"
SQ   SEQUENCE   287 AA;  31597 MW;  F0991112F2BD8339 CRC64;
     MIIKVPATSA NLGPGFDSVG IAVTKYLEIE VLEERDDWYV EHTLENVPSD HHNLLIQTAL
     RLAPDIKPHH ILMRSDIPLA RGLGSSSSVI VAGIELANQL AKLELSMDRK FAIATEIEGH
     PDNVAPAIFG QLVIASQLDN QLDYIRAPFP EASLLAFIPN YELKTSDSRD ALPKHLSYKQ
     AVAASSIANL AIAALLKGDM EKAGRAIEND LFHELYRQRL VKEFHSIKQI SKKSGAYATY
     LSGAGPTVMI LCPHEKVEGI FQELTDLSLD GLLERLQIDE KGLQVLF