ID A0A672Q3J0_SINGR Unreviewed; 307 AA.
AC A0A672Q3J0;
DT 17-JUN-2020, integrated into UniProtKB/TrEMBL.
DT 17-JUN-2020, sequence version 1.
DT 28-JAN-2026, entry version 23.
DE RecName: Full=Pyridoxal kinase {ECO:0000256|ARBA:ARBA00018134};
DE EC=2.7.1.35 {ECO:0000256|ARBA:ARBA00012104};
DE AltName: Full=Pyridoxine kinase {ECO:0000256|ARBA:ARBA00032808};
GN Name=pdxkb {ECO:0000313|Ensembl:ENSSGRP00000068262.1};
OS Sinocyclocheilus grahami (Dianchi golden-line fish) (Barbus grahami).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Cypriniformes;
OC Cyprinidae; Cyprininae; Sinocyclocheilus.
OX NCBI_TaxID=75366 {ECO:0000313|Ensembl:ENSSGRP00000068262.1, ECO:0000313|Proteomes:UP000472262};
RN [1] {ECO:0000313|Ensembl:ENSSGRP00000068262.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (AUG-2025) to UniProtKB.
RN [2] {ECO:0000313|Ensembl:ENSSGRP00000068262.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (SEP-2025) to UniProtKB.
CC -!- FUNCTION: Catalyzes the phosphorylation of the dietary vitamin B6
CC vitamers pyridoxal (PL), pyridoxine (PN) and pyridoxamine (PM) to form
CC pyridoxal 5'-phosphate (PLP), pyridoxine 5'-phosphate (PNP) and
CC pyridoxamine 5'-phosphate (PMP), respectively. PLP is the active form
CC of vitamin B6, and acts as a cofactor for over 140 different enzymatic
CC reactions. {ECO:0000256|ARBA:ARBA00045787}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=pyridoxal + ATP = pyridoxal 5'-phosphate + ADP + H(+);
CC Xref=Rhea:RHEA:10224, ChEBI:CHEBI:15378, ChEBI:CHEBI:17310,
CC ChEBI:CHEBI:30616, ChEBI:CHEBI:456216, ChEBI:CHEBI:597326;
CC EC=2.7.1.35; Evidence={ECO:0000256|ARBA:ARBA00047377};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:10225;
CC Evidence={ECO:0000256|ARBA:ARBA00047377};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=pyridoxamine + ATP = pyridoxamine 5'-phosphate + ADP + H(+);
CC Xref=Rhea:RHEA:25104, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:57761, ChEBI:CHEBI:58451, ChEBI:CHEBI:456216;
CC EC=2.7.1.35; Evidence={ECO:0000256|ARBA:ARBA00047310};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:25105;
CC Evidence={ECO:0000256|ARBA:ARBA00047310};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=pyridoxine + ATP = pyridoxine 5'-phosphate + ADP + H(+);
CC Xref=Rhea:RHEA:25108, ChEBI:CHEBI:15378, ChEBI:CHEBI:16709,
CC ChEBI:CHEBI:30616, ChEBI:CHEBI:58589, ChEBI:CHEBI:456216;
CC EC=2.7.1.35; Evidence={ECO:0000256|ARBA:ARBA00048524};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:25109;
CC Evidence={ECO:0000256|ARBA:ARBA00048524};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|ARBA:ARBA00001946};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|ARBA:ARBA00001947};
CC -!- PATHWAY: Cofactor metabolism; pyridoxal 5'-phosphate salvage; pyridoxal
CC 5'-phosphate from pyridoxal: step 1/1. {ECO:0000256|ARBA:ARBA00005210}.
CC -!- PATHWAY: Cofactor metabolism; pyridoxal 5'-phosphate salvage;
CC pyridoxamine 5'-phosphate from pyridoxamine: step 1/1.
CC {ECO:0000256|ARBA:ARBA00004750}.
CC -!- PATHWAY: Cofactor metabolism; pyridoxal 5'-phosphate salvage;
CC pyridoxine 5'-phosphate from pyridoxine: step 1/1.
CC {ECO:0000256|ARBA:ARBA00004835}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|ARBA:ARBA00011738}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm, cytosol
CC {ECO:0000256|ARBA:ARBA00004514}.
CC -!- SIMILARITY: Belongs to the pyridoxine kinase family.
CC {ECO:0000256|ARBA:ARBA00008805}.
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DR AlphaFoldDB; A0A672Q3J0; -.
DR Ensembl; ENSSGRT00000072753.1; ENSSGRP00000068262.1; ENSSGRG00000035005.1.
DR InParanoid; A0A672Q3J0; -.
DR OMA; FEMETLT; -.
DR UniPathway; UPA01068; UER00298.
DR Proteomes; UP000472262; Unassembled WGS sequence.
DR GO; GO:0005829; C:cytosol; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0008478; F:pyridoxal kinase activity; IEA:UniProtKB-EC.
DR GO; GO:0009443; P:pyridoxal 5'-phosphate salvage; IEA:InterPro.
DR CDD; cd01173; pyridoxal_pyridoxamine_kinase; 1.
DR FunFam; 3.40.1190.20:FF:000007; Pyridoxal kinase; 1.
DR Gene3D; 3.40.1190.20; -; 1.
DR InterPro; IPR013749; PM/HMP-P_kinase-1.
DR InterPro; IPR004625; PyrdxlKinase.
DR InterPro; IPR029056; Ribokinase-like.
DR NCBIfam; TIGR00687; pyridox_kin; 1.
DR PANTHER; PTHR10534; PYRIDOXAL KINASE; 1.
DR PANTHER; PTHR10534:SF2; PYRIDOXAL KINASE; 1.
DR Pfam; PF08543; Phos_pyr_kin; 1.
DR SUPFAM; SSF53613; Ribokinase-like; 1.
PE 3: Inferred from homology;
KW Acetylation {ECO:0000256|ARBA:ARBA00022990};
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490};
KW Kinase {ECO:0000256|ARBA:ARBA00022777};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741};
KW Phosphoprotein {ECO:0000256|ARBA:ARBA00022553};
KW Reference proteome {ECO:0000313|Proteomes:UP000472262};
KW Sodium {ECO:0000256|ARBA:ARBA00023053};
KW Transferase {ECO:0000256|ARBA:ARBA00022679}.
FT DOMAIN 83..275
FT /note="Pyridoxamine kinase/Phosphomethylpyrimidine kinase"
FT /evidence="ECO:0000259|Pfam:PF08543"
SQ SEQUENCE 307 AA; 34767 MW; E182914126629BB1 CRC64;
MEEHMCRVLS IQSHVVRGYV GNKSASFPLQ VLGFEVDSIN SVQFSNHTGY SHWKGQVLTA
DELHVLYEGI KLNNVNHYDY VLTGYTRDTS FLEMVVDIVQ ELKRANPNLV YVCDPVLGDH
GSMYVPQNLH PVYKNKVVPV ADIITPNQFE AELLTGKNIS TEKDAVEVMD LLHKMGPDTV
VITSSDLPPR LGDRFLVSFG SQRILMPDGT RTTQRIRIEV PKVDAVFVGT GDLFAAMLLA
WTHHYPTDLK TACEKTFSVM HHVIQRTISY AHGKTTAKSC LFDMYMHGVG LNIFSIRRYQ
QQKLIYY
//
