ID A0A674F561_SALTR Unreviewed; 308 AA.
AC A0A674F561;
DT 17-JUN-2020, integrated into UniProtKB/TrEMBL.
DT 17-JUN-2020, sequence version 1.
DT 28-JAN-2026, entry version 22.
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=PDXK {ECO:0000313|Ensembl:ENSSTUP00000115418.1};
GN Synonyms=pdxka {ECO:0000313|Ensembl:ENSSTUP00000115418.1};
OS Salmo trutta (Brown trout).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Actinopterygii; Neopterygii; Teleostei; Protacanthopterygii; Salmoniformes;
OC Salmonidae; Salmoninae; Salmo.
OX NCBI_TaxID=8032 {ECO:0000313|Ensembl:ENSSTUP00000115418.1, ECO:0000313|Proteomes:UP000472277};
RN [1] {ECO:0000313|Ensembl:ENSSTUP00000115418.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (AUG-2025) to UniProtKB.
RN [2] {ECO:0000313|Ensembl:ENSSTUP00000115418.1}
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; A0A674F561; -.
DR Ensembl; ENSSTUT00000123496.1; ENSSTUP00000115418.1; ENSSTUG00000050837.1.
DR GeneTree; ENSGT00390000003874; -.
DR UniPathway; UPA01068; UER00298.
DR Proteomes; UP000472277; Chromosome 24.
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:UP000472277};
KW Sodium {ECO:0000256|ARBA:ARBA00023053};
KW Transferase {ECO:0000256|ARBA:ARBA00022679}.
FT DOMAIN 82..271
FT /note="Pyridoxamine kinase/Phosphomethylpyrimidine kinase"
FT /evidence="ECO:0000259|Pfam:PF08543"
SQ SEQUENCE 308 AA; 34262 MW; E6237A027AD842B1 CRC64;
IEMECRVLSV QSHVVRGYVG NKSATFPLQV LGFEVDSINS VQFSNHTGYA HWKGQVLTAD
ELNVLYEGIK LNNVNHYDYV LTGYTRDTSF LETVVDIVQE LKRLNPKLVY VCDPVMGDQG
SMYVPENILP VYRDKVVAVA DILTPNQFEA ELLTGRKIST EKDALEVMDL LHQMGPDMVV
LTSTDLISPH GGQFLVALGS QKMVRPDGTT STQKIRMEMP KVDAVFVGTG DLFAAMLLAW
THHHPKDLKA ACEKTVSVLH HVIKRTITYA NKMAGPGKRP SPAQLELRMV QSKKDIEYPA
IVVEAIVL
//
