The PDXK gene encodes the enzyme pyridoxal kinase, which is essential for converting vitamin B6 into its active form, pyridoxal-5′-phosphate (PLP). PLP functions as a coenzyme in over 100 enzymatic reactions, many of which are involved in amino acid metabolism, neurotransmitter synthesis, and energy production. Variants in the PDXK gene may impair this conversion, potentially leading to functional vitamin B6 deficiency even if B6 intake is sufficient. Disruption in PLP levels has been linked to neurological symptoms, fatigue, and mood disturbances.
It produces pyridoxal kinase, an enzyme responsible for activating vitamin B6 into its usable form, PLP.
PLP acts as a coenzyme in many critical processes, including neurotransmitter production, amino acid metabolism, and energy pathways.
Impaired conversion of B6 to PLP may result in symptoms of B6 deficiency, such as low mood, fatigue, or neurological issues.
Yes, if PDXK function is compromised due to genetic variants, B6 may not be efficiently activated into PLP despite adequate dietary intake.