ID   KHSE_PYRCJ              Reviewed;         296 AA.
AC   A3MT44;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   03-APR-2007, sequence version 1.
DT   03-AUG-2022, entry version 77.
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=Pcal_0376;
OS   Pyrobaculum calidifontis (strain DSM 21063 / JCM 11548 / VA1).
OC   Archaea; Crenarchaeota; Thermoprotei; Thermoproteales; Thermoproteaceae;
OC   Pyrobaculum.
OX   NCBI_TaxID=410359;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 21063 / JCM 11548 / VA1;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Cozen A.E.,
RA   Fitz-Gibbon S.T., House C.H., Saltikov C., Lowe T.M., Richardson P.;
RT   "Complete sequence of Pyrobaculum calidifontis JCM 11548.";
RL   Submitted (FEB-2007) to the EMBL/GenBank/DDBJ databases.
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; CP000561; ABO07811.1; -; Genomic_DNA.
DR   AlphaFoldDB; A3MT44; -.
DR   SMR; A3MT44; -.
DR   STRING; 410359.Pcal_0376; -.
DR   EnsemblBacteria; ABO07811; ABO07811; Pcal_0376.
DR   KEGG; pcl:Pcal_0376; -.
DR   eggNOG; arCOG01027; Archaea.
DR   HOGENOM; CLU_041243_1_1_2; -.
DR   OMA; CANRIPH; -.
DR   UniPathway; UPA00050; UER00064.
DR   Proteomes; UP000001431; 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   PROSITE; PS00627; GHMP_KINASES_ATP; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; ATP-binding; Cytoplasm; Kinase;
KW   Nucleotide-binding; Threonine biosynthesis; Transferase.
FT   CHAIN           1..296
FT                   /note="Homoserine kinase"
FT                   /id="PRO_1000122434"
FT   BINDING         79..89
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00384"
SQ   SEQUENCE   296 AA;  30486 MW;  3F4E620A332F1624 CRC64;
     MRAPSTSANL GAGFDVVAVA HDAYFAEAYV AVEQGCGVAV KFKGYDPGEN NTVSLAFRHL
     FNMLGICRQV EVVVDNRIPL ARGLGSSGAS AVAALAAFIR EAGLKAEPKL VVEAAGLGEV
     AAAGSPHFDN VAGAALGGAV VVVSTSPLEV VKFSPKLLFV VGVPDVPPIP EKTRLMRSVL
     PREVPFKTYV AQLARVSALV AGFATSNPRL VALGMSDDVV EPARAPYVHG YARARRYALE
     AGALGFAISG AGPSVVALVD DKHSDAVRAA LARAYAEEGL RAEVKVAQVA EGALGV