ID A0A248KLA0_9ENTR Unreviewed; 309 AA.
AC A0A248KLA0; A0A6G9RQG7;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 24-JAN-2024, entry version 25.
DE RecName: Full=Homoserine kinase {ECO:0000256|ARBA:ARBA00017858, ECO:0000256|HAMAP-Rule:MF_00384};
DE Short=HK {ECO:0000256|HAMAP-Rule:MF_00384};
DE Short=HSK {ECO:0000256|HAMAP-Rule:MF_00384};
DE EC=2.7.1.39 {ECO:0000256|ARBA:ARBA00012078, ECO:0000256|HAMAP-Rule:MF_00384};
GN Name=thrB {ECO:0000256|HAMAP-Rule:MF_00384,
GN ECO:0000313|EMBL:QIR28968.1};
GN ORFNames=CEW81_21075 {ECO:0000313|EMBL:ASG64172.1}, GY169_20105
GN {ECO:0000313|EMBL:QIR28968.1};
OS Kluyvera genomosp. 3.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Kluyvera.
OX NCBI_TaxID=2774055 {ECO:0000313|EMBL:ASG64172.1, ECO:0000313|Proteomes:UP000197098};
RN [1] {ECO:0000313|EMBL:ASG64172.1, ECO:0000313|Proteomes:UP000197098}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=YDC799 {ECO:0000313|EMBL:ASG64172.1,
RC ECO:0000313|Proteomes:UP000197098};
RA Ito R., Pacey M.P., Doi Y.;
RT "Origin of plasmid-mediated fosfomycin resistance gene fosA3.";
RL Submitted (JUN-2017) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:QIR28968.1, ECO:0000313|Proteomes:UP000503580}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PO2S7 {ECO:0000313|EMBL:QIR28968.1,
RC ECO:0000313|Proteomes:UP000503580};
RA Singha K.M.;
RT "Whole genome PO2S7.";
RL Submitted (FEB-2020) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the ATP-dependent phosphorylation of L-homoserine
CC to L-homoserine phosphate. {ECO:0000256|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:0000256|ARBA:ARBA00000528,
CC ECO:0000256|HAMAP-Rule:MF_00384};
CC -!- PATHWAY: Amino-acid biosynthesis; L-threonine biosynthesis; L-threonine
CC from L-aspartate: step 4/5. {ECO:0000256|ARBA:ARBA00005015,
CC ECO:0000256|HAMAP-Rule:MF_00384}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00384}.
CC -!- SIMILARITY: Belongs to the GHMP kinase family. Homoserine kinase
CC subfamily. {ECO:0000256|ARBA:ARBA00007370, ECO:0000256|HAMAP-
CC Rule:MF_00384}.
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DR EMBL; CP022114; ASG64172.1; -; Genomic_DNA.
DR EMBL; CP050321; QIR28968.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A248KLA0; -.
DR KEGG; kgo:CEW81_21075; -.
DR UniPathway; UPA00050; UER00064.
DR Proteomes; UP000197098; Chromosome.
DR Proteomes; UP000503580; 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; GHMP kinase, C-terminal domain; 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_Su5_D2-typ_SF.
DR InterPro; IPR014721; Ribsml_uS5_D2-typ_fold_subgr.
DR NCBIfam; TIGR00191; thrB; 1.
DR PANTHER; PTHR20861:SF1; HOMOSERINE KINASE; 1.
DR PANTHER; PTHR20861; HOMOSERINE/4-DIPHOSPHOCYTIDYL-2-C-METHYL-D-ERYTHRITOL KINASE; 1.
DR Pfam; PF08544; GHMP_kinases_C; 1.
DR Pfam; PF00288; GHMP_kinases_N; 1.
DR PIRSF; PIRSF000676; Homoser_kin; 1.
DR PRINTS; PR00958; HOMSERKINASE.
DR SUPFAM; SSF55060; GHMP Kinase, C-terminal domain; 1.
DR SUPFAM; SSF54211; Ribosomal protein S5 domain 2-like; 1.
DR PROSITE; PS00627; GHMP_KINASES_ATP; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW Rule:MF_00384};
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_00384}; Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00384};
KW Kinase {ECO:0000256|ARBA:ARBA00022777, ECO:0000256|HAMAP-Rule:MF_00384};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_00384}; Reference proteome {ECO:0000313|Proteomes:UP000197098};
KW Threonine biosynthesis {ECO:0000256|ARBA:ARBA00022697, ECO:0000256|HAMAP-
KW Rule:MF_00384};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00384}.
FT DOMAIN 84..150
FT /note="GHMP kinase N-terminal"
FT /evidence="ECO:0000259|Pfam:PF00288"
FT DOMAIN 211..285
FT /note="GHMP kinase C-terminal"
FT /evidence="ECO:0000259|Pfam:PF08544"
FT BINDING 91..101
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00384"
SQ SEQUENCE 309 AA; 33386 MW; 4D05C80DFE9A164C CRC64;
MVKVYAPASS ANMSVGFDVL GAAVTPIDGS LLGDNVSVEA ADRFSLQNLG RFADKLPSEP
HENIVYQCWE RFCQEIGKEI PVAMTLEKNM PIGSGLGSSA CSVVAALVAM NEHCGRPLDE
TRMLALMGEL EGRISGSVHY DNVAPCYLGG MQLMIEENDI ISQQVPCFDD WLWVLAYPGI
KVSTAEARAI LPAQYRRQDC VAHGRHLAGF IHACYSRQPQ LAAKLMKDVI AEPYRTKLLP
GFSEARQAVA GIGAVACGIS GSGPTLFALC DKTETAQRVA DWLGQHYLQN QEGFVHICRL
DTAGARVVG
//
