ID   KHSE_RHOE4              Reviewed;         314 AA.
AC   C1A1Z3;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   26-MAY-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=RER_39200;
OS   Rhodococcus erythropolis (strain PR4 / NBRC 100887).
OC   Bacteria; Actinobacteria; Corynebacteriales; Nocardiaceae; Rhodococcus;
OC   Rhodococcus erythropolis group.
OX   NCBI_TaxID=234621;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PR4 / NBRC 100887;
RA   Takarada H., Sekine M., Hosoyama A., Yamada R., Fujisawa T., Omata S.,
RA   Shimizu A., Tsukatani N., Tanikawa S., Fujita N., Harayama S.;
RT   "Comparison of the complete genome sequences of Rhodococcus erythropolis
RT   PR4 and Rhodococcus opacus B4.";
RL   Submitted (MAR-2005) 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; AP008957; BAH34628.1; -; Genomic_DNA.
DR   RefSeq; WP_007726194.1; NC_012490.1.
DR   AlphaFoldDB; C1A1Z3; -.
DR   SMR; C1A1Z3; -.
DR   STRING; 234621.RER_39200; -.
DR   EnsemblBacteria; BAH34628; BAH34628; RER_39200.
DR   GeneID; 64141712; -.
DR   KEGG; rer:RER_39200; -.
DR   eggNOG; COG0083; Bacteria.
DR   HOGENOM; CLU_041243_0_1_11; -.
DR   OMA; CANRIPH; -.
DR   UniPathway; UPA00050; UER00064.
DR   Proteomes; UP000002204; 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; Threonine biosynthesis; Transferase.
FT   CHAIN           1..314
FT                   /note="Homoserine kinase"
FT                   /id="PRO_1000205739"
FT   BINDING         95..105
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00384"
SQ   SEQUENCE   314 AA;  32176 MW;  C750BA9F81F8F243 CRC64;
     MTITLPIGLS VTARVPASSA NLGPGFDTLG LALGLYDEIV VTTTDSGLQI RVEGEGAADV
     PWGPSHLVVR AIERGLEAAG VWASGLDVLC RNAIPHSRGL GSSASAAVGG LAAANGLARA
     LDAEIGLTEE QLVQLSSEFE GHPDNASASV LGGAVVSWSC PPAVEGDEPI YSAAKLDVHP
     DIRAVALVPE ERSSTAHTRG LLPELVPHQD ASFNASRSAL AVVALTARPD LLMAATEDRL
     HQAQRAPALP LTTRWIGILR EAGIAATVSG AGPTVLALST EPFPVELAEA ARADGLRVLE
     LDIADGVEVS TTTV