Title : Perinatal hypophosphatasia: tissue levels of vitamin B6 are unremarkable despite markedly increased circulating concentrations of pyridoxal-5'-phosphate. Evidence for an ectoenzyme role for tissue-nonspecific alkaline phosphatase.

Pub. Date : 1988 Apr

PMID : 3350970






1 Functional Relationships(s)
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1 Our findings help to explain the general absence of symptoms of vitamin B6 excess or deficiency in hypophosphatasia, and provide evidence that TNSALP acts as an ectoenzyme to regulate extracellular rather than intracellular concentrations of PLP (the cofactor form of vitamin B6) and perhaps other phosphate compounds. Vitamin B 6 pyridoxal phosphatase Homo sapiens