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Twelve novel mutations in the tissue-nonspecific alkaline phosphatase gene (ALPL) in patients with various forms of hypophosphatasia.

Taillandier A., Lia-Baldini A.S., Mouchard M., Robin B., Muller F., Simon-Bouy B., Serre J.L., Bera-Louville A., Bonduelle M., Eckhardt J., Gaillard D., Myhre A.G., Koertge-Jung S., Larget-Piet L., Malou E., Sillence D., Temple I.K., Viot G., Mornet E.

Hypophosphatasia is a rare inherited disorder characterized by defective bone mineralization and deficiency of serum and tissue liver/bone/kidney tissue alkaline phosphatase (L/B/K ALP) activity. We report here the characterization of tissue-nonspecific alkaline phosphatase (TNSALP) gene mutations in a series of 11 families affected by various forms of hypophosphatasia. Nineteen distinct mutations were found, 7 of which were previously reported. Eleven of the 12 new mutations were missense mutations (Y11C, A34V, R54H, R135H, N194D, G203V, E218G, D277Y, F310G, A382S, V406A), the last one (998-1G>T) was a mutation affecting acceptor splice site.

Hum. Mutat. 18:83-84(2001) [PubMed] [Europe PMC]

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