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Fifteen new mutations (-195C>T, L-12X, 298-2A>G, T117N, A159T, R229S, 997+2T>A, E274X, A331T, H364R, D389G, 1256delC, R433H, N461I, C472S) in the tissue-nonspecific alkaline phosphatase (TNSALP) gene in patients with hypophosphatasia.

Taillandier A., Cozien E., Muller F., Merrien Y., Bonnin E., Fribourg C., Simon-Bouy B., Serre J.L., Bieth E., Brenner R., Cordier M.P., De Bie S., Fellmann F., Freisinger P., Hesse V., Hennekam R.C.M., Josifova D., Kerzin-Storrar L., Leporrier N., Zabot M.-T., Mornet E.

Hypophosphatasia is a rare inherited disorder characterized by defective bone mineralization and deficiency of serum and liver/bone/kidney-type alkaline phosphatase (L/B/K ALP) activity. We report the characterization of tissue-nonspecific alkaline phosphatase (TNSALP) gene mutations in a series of 12 families affected by severe or mild hypophosphatasia. Twenty distinct mutations were found, 5 of which were previously reported. Nine of the 15 new mutations were missense mutations (T117N, A159T, R229S, A331T, H364R, D389G, R433H, N461I, and C472S). The others were 2 nonsense mutations (L-12X and E274X), one single nucleotide deletion (1256delC), 2 mutations affecting splicing (298-2A>G, 997+2T>A), and a mutation in the major transcription start site (-195C>T). Hum Mutat 15:293, 2000.

Hum. Mutat. 15:293-293(2000) [PubMed] [Europe PMC]

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