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GAL1_STRTR
ID   GAL1_STRTR              Reviewed;         388 AA.
AC   Q9ZB10;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1999, sequence version 1.
DT   03-AUG-2022, entry version 100.
DE   RecName: Full=Galactokinase {ECO:0000255|HAMAP-Rule:MF_00246};
DE            EC=2.7.1.6 {ECO:0000255|HAMAP-Rule:MF_00246};
DE   AltName: Full=Galactose kinase {ECO:0000255|HAMAP-Rule:MF_00246};
GN   Name=galK {ECO:0000255|HAMAP-Rule:MF_00246};
OS   Streptococcus thermophilus.
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=1308;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=CNRZ 302;
RX   PubMed=11157930; DOI=10.1128/jb.183.4.1184-1194.2001;
RA   Vaughan E.E., van den Bogaard P.T.C., Catzeddu P., Kuipers O.P.,
RA   de Vos W.M.;
RT   "Activation of silent gal genes in the lac-gal regulon of Streptococcus
RT   thermophilus.";
RL   J. Bacteriol. 183:1184-1194(2001).
CC   -!- FUNCTION: Catalyzes the transfer of the gamma-phosphate of ATP to D-
CC       galactose to form alpha-D-galactose-1-phosphate (Gal-1-P).
CC       {ECO:0000255|HAMAP-Rule:MF_00246}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=alpha-D-galactose + ATP = ADP + alpha-D-galactose 1-phosphate
CC         + H(+); Xref=Rhea:RHEA:13553, ChEBI:CHEBI:15378, ChEBI:CHEBI:28061,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:58336, ChEBI:CHEBI:456216; EC=2.7.1.6;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00246};
CC   -!- PATHWAY: Carbohydrate metabolism; galactose metabolism.
CC       {ECO:0000255|HAMAP-Rule:MF_00246}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00246}.
CC   -!- SIMILARITY: Belongs to the GHMP kinase family. GalK subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_00246}.
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DR   EMBL; U61402; AAD00093.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q9ZB10; -.
DR   SMR; Q9ZB10; -.
DR   STRING; 322159.STER_1371; -.
DR   eggNOG; COG0153; Bacteria.
DR   UniPathway; UPA00214; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004335; F:galactokinase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006012; P:galactose metabolic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.30.230.10; -; 1.
DR   Gene3D; 3.30.70.890; -; 1.
DR   HAMAP; MF_00246; Galactokinase; 1.
DR   InterPro; IPR000705; Galactokinase.
DR   InterPro; IPR022963; Galactokinase_bac.
DR   InterPro; IPR019741; Galactokinase_CS.
DR   InterPro; IPR019539; GalKase_N.
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; IPR006206; Mevalonate/galactokinase.
DR   InterPro; IPR020568; Ribosomal_S5_D2-typ_fold.
DR   InterPro; IPR014721; Ribosomal_S5_D2-typ_fold_subgr.
DR   PANTHER; PTHR10457:SF6; PTHR10457:SF6; 1.
DR   Pfam; PF10509; GalKase_gal_bdg; 1.
DR   Pfam; PF08544; GHMP_kinases_C; 1.
DR   Pfam; PF00288; GHMP_kinases_N; 1.
DR   PIRSF; PIRSF000530; Galactokinase; 1.
DR   PRINTS; PR00473; GALCTOKINASE.
DR   SUPFAM; SSF54211; SSF54211; 1.
DR   SUPFAM; SSF55060; SSF55060; 1.
DR   TIGRFAMs; TIGR00131; gal_kin; 1.
DR   PROSITE; PS00106; GALACTOKINASE; 1.
DR   PROSITE; PS00627; GHMP_KINASES_ATP; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Carbohydrate metabolism; Cytoplasm; Galactose metabolism;
KW   Kinase; Magnesium; Metal-binding; Nucleotide-binding; Transferase.
FT   CHAIN           1..388
FT                   /note="Galactokinase"
FT                   /id="PRO_0000184630"
FT   ACT_SITE        174
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   BINDING         33..36
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   BINDING         67
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   BINDING         124..130
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   BINDING         130
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   BINDING         162
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   BINDING         224
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
FT   SITE            27
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00246"
SQ   SEQUENCE   388 AA;  43450 MW;  97785356F20944AF CRC64;
     MNTSQLREKF KEVFGVEADH TFFSPGRINL IGEHTDYNGG NVLPVAITLG TYGAARKRDD
     KVLRFFSANF EEKGIIEVPL ENLRFEKEHN WTNYPKGVLH FLQEAGHTID SGMDIYIYGN
     IPNGSGLSSS SSLELLIGVI VEKLYDIKLE RLDLVKIGKQ TENDFIGVNS GIMDQFAIGM
     GADQCAIYLD TNTLKYDLVP LDLKDNVVVI MNTNKRRELA DSKYNERRAE CETAVSELQE
     KLDIQTLGEL DFLTFDAYSY LIKDENRIKR ARHVVLENQR TLQARKALET GDLEGFGRLM
     NASHVSLEYD YEVTGLELDT LAHTAWEQEG VLGARMTGAG FGGCAIALVN KDKVEDFKKA
     VGQRYEEVVG YAPSFYIAEV TGGSRVLD
 
 
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