ID   KHSE_RHORT              Reviewed;         321 AA.
AC   Q2RPU7;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   24-JAN-2006, sequence version 1.
DT   03-AUG-2022, entry version 93.
DE   RecName: Full=Homoserine kinase {ECO:0000255|HAMAP-Rule:MF_00301};
DE            Short=HK {ECO:0000255|HAMAP-Rule:MF_00301};
DE            Short=HSK {ECO:0000255|HAMAP-Rule:MF_00301};
DE            EC=2.7.1.39 {ECO:0000255|HAMAP-Rule:MF_00301};
GN   Name=thrB {ECO:0000255|HAMAP-Rule:MF_00301}; OrderedLocusNames=Rru_A3053;
OS   Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 /
OS   NCIMB 8255 / S1).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodospirillales;
OC   Rhodospirillaceae; Rhodospirillum.
OX   NCBI_TaxID=269796;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1;
RX   PubMed=21886856; DOI=10.4056/sigs.1804360;
RA   Munk A.C., Copeland A., Lucas S., Lapidus A., Del Rio T.G., Barry K.,
RA   Detter J.C., Hammon N., Israni S., Pitluck S., Brettin T., Bruce D.,
RA   Han C., Tapia R., Gilna P., Schmutz J., Larimer F., Land M., Kyrpides N.C.,
RA   Mavromatis K., Richardson P., Rohde M., Goeker M., Klenk H.P., Zhang Y.,
RA   Roberts G.P., Reslewic S., Schwartz D.C.;
RT   "Complete genome sequence of Rhodospirillum rubrum type strain (S1).";
RL   Stand. Genomic Sci. 4:293-302(2011).
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_00301};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-threonine biosynthesis; L-threonine
CC       from L-aspartate: step 4/5. {ECO:0000255|HAMAP-Rule:MF_00301}.
CC   -!- SIMILARITY: Belongs to the pseudomonas-type ThrB family.
CC       {ECO:0000255|HAMAP-Rule:MF_00301}.
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DR   EMBL; CP000230; ABC23848.1; -; Genomic_DNA.
DR   RefSeq; WP_011390801.1; NC_007643.1.
DR   RefSeq; YP_428135.1; NC_007643.1.
DR   AlphaFoldDB; Q2RPU7; -.
DR   SMR; Q2RPU7; -.
DR   STRING; 269796.Rru_A3053; -.
DR   EnsemblBacteria; ABC23848; ABC23848; Rru_A3053.
DR   KEGG; rru:Rru_A3053; -.
DR   PATRIC; fig|269796.9.peg.3164; -.
DR   eggNOG; COG2334; Bacteria.
DR   HOGENOM; CLU_053300_1_0_5; -.
DR   OMA; DPTHFER; -.
DR   OrthoDB; 1003984at2; -.
DR   PhylomeDB; Q2RPU7; -.
DR   UniPathway; UPA00050; UER00064.
DR   Proteomes; UP000001929; Chromosome.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
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   CDD; cd05153; HomoserineK_II; 1.
DR   HAMAP; MF_00301; Homoser_kinase_2; 1.
DR   InterPro; IPR002575; Aminoglycoside_PTrfase.
DR   InterPro; IPR005280; Homoserine_kinase_II.
DR   InterPro; IPR011009; Kinase-like_dom_sf.
DR   Pfam; PF01636; APH; 1.
DR   SUPFAM; SSF56112; SSF56112; 1.
DR   TIGRFAMs; TIGR00938; thrB_alt; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; ATP-binding; Kinase; Nucleotide-binding;
KW   Reference proteome; Threonine biosynthesis; Transferase.
FT   CHAIN           1..321
FT                   /note="Homoserine kinase"
FT                   /id="PRO_0000300807"
SQ   SEQUENCE   321 AA;  35873 MW;  A224D3AE0B7D14B5 CRC64;
     MAVYTDVSDD DLTTFLEGYD IGRLRACKGI AEGVENSNFL LVTDRGPHIL TLYEKRVNPD
     DLPFFLGLLR HLAARDIPCP QPVAGRDGAV LHTLCDRPAA IVTFLDGVWP KRPEVRHCAQ
     LGEALARLHL AGGDYAPTRR NSLSVDGWRP LFDAAAERAD SVKPGLRAEL ETELDALEAL
     WPHDLPTGII HADLFPDNVF FVDDTLSGLI DFYFACDDFL AYDLAVCLNA WCFEGEREFN
     VTKARHMLTR YEKVRPLSDA EFAALPLLAR GAAMRFLLTR LYDWLNTPPG AMVRPKDPME
     YYHKLAFHRA VSGPGAYGLS R