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Catalyzes the phosphorylation of the dietary vitamin B6 vitamers pyridoxal (PL), pyridoxine (PN) and pyridoxamine (PM) to form pyridoxal 5'-phosphate (PLP), pyridoxine 5'-phosphate (PNP) and pyridoxamine 5'-phosphate (PMP), respectively (Probable). PLP is the active form of vitamin B6, and acts as a cofactor for over 140 different enzymatic reactions.
Gene References into Functions
The affected pyridoxine metabolism is discussed as an inborn genetic trait in epilepsy in general, rather than a specific sign of pyridoxine-dependent epilepsy solely. PMID: 22647618
The pyridoxal kinase showed decreased levels and was highly carbonylated in the gene-on mice PMID: 20639122
This study identified a DNA variant (rs2010795) in PDXK associated with an increased risk of PD in the German cohort This association was confirmed in the British and Italian cohorts individually and reached a combined value. PMID: 20035503
Pyridoxal kinase expression was compared in fetal Down syndrome (DS) brain and controls; PDXK levels were found to be similar. PMID: 15082224
A promoter mutation with potential erythroid-specific properties that could be the basis of a novel mechanism of controlling cell-specific decreased activity of an essential enzyme in erythrocytes. PMID: 16704963
The crystal structure of the MgATP complex also reveals Mg(2+) and Na(+) acting in tandem to anchor the ATP at the active site of pyridoxal kinase. PMID: 17766369
These results document the role of Asp235 in PL kinase activity. PMID: 19351586
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Subcellular Location
Cytoplasm, cytosol.
Protein Families
Pyridoxine kinase family
Tissue Specificity
Ubiquitous. Highly expressed in testis.; [Isoform 3]: In adult testis and spermatozoa.