Common N-acetylgalactosamine-6-sulfate sulfatase (GALNS) exon mutations in Brazilian patients with mucopolysaccharidosis IVA (MPS IVA)

Morquio A Syndrome (mucopolysaccharidosis IVA - MPS IVA, OMIM# 253000) is an autosomal recessive inborn error of metabolism caused by the deficiency of N-acetylgalactosamine-6-sulfate sulfatase (GALNS). We investigated five unrelated Brazilian MPS IVA families for mutations in exons 4, 5, 9 and 10 of the GALNS gene. Six out of the 10 mutant alleles were identified. Taken together with a previous study, which included six unrelated families, common mutations among Brazilian patients were p.N164T, p.G116S and p.G301C. Among one hundred control subjects three novel silent mutations were found (p.A107A; GCC -> GCT, p.Y108Y; TAC -> TAT, p.P357P; CCG -> CCA). Screening starting with exons 4, 5, 9, 10 and 11 may be a good strategy for genotyping of Brazilian patients since these exons include 73% of all mutations identified in the current and previous studies.

Bibliographic Details

Main Authors:	Dieter,Tatiana, Matte,Ursula da Silveira, Schwartz,Ida Vanessa, Tomatsu,Shunji, Giugliani,Roberto
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Genética 2007
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400004
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