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A D255H substitution in the arylsulphatase A gene of two unrelated Belgian patients with late-infantile metachromatic leukodystrophy.

par Lissens, Willy;Vervoort, R;Van Regemorter, Nicole ;Van Bogaert, Patrick ;Freund, M;Verellen-Dumoulin, Christine;Seneca, S;Liebaers, Ingeborg
Référence Journal of inherited metabolic disease, 19, 6, page (782-786)
Publication Publié, 1996

Article révisé par les pairs

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Résumé :

Metachromatic leukodystrophy (MLD) is an autosomal recessive disease of myelin metabolism caused by a deficiency in the lysosomal enzyme arylsulphatase A (ARSA). We have identified a new mutation in exon 4 of the ARSA gene of two unrelated Belgian patients with late-infantile MLD. The mutation predicts an aspartic acid-to-histidine substitution at position 255 in arylsulphatase A (D255H), in a highly conserved region among sulphatases. Transient expression of the mutation in COS cells did not show an increase in ARSA activity. Both patients were compound heterozygotes carrying the frequent splice site mutation in intron 2 (459 + IG -->A) on the other allele.