Mutation analysis in the iduronate-2-sulphatase gene in 43 Japanese patients with mucopolysaccharidosis type II (Hunter disease).

Abstract:

:Our series of studies on Hunter disease in Japanese patients showed allelic heterogeneity of IDS gene mutations, genotype/phenotype correlation and racial differences in distribution of mutations. Twenty-five different small mutations have been characterized. Small mutations in the Japanese population are widely distributed through the IDS gene, although some mutations were unevenly concentrated on exon 5 (28%) and on exon 9 (24%). Mutations were seen at the same codon 468 in exon 9 in 5 patients. These findings are in good agreement with data on other ethnic groups. Two unique mutations linked to a severe phenotype were apparently associated with aberrant splicings; one was a point mutation within exon 3 (P86L), partially activating a cryptic splice acceptor site at 28 bp downstream from the mutation site within exon 3 and producing a 44-base truncated mRNA, and the other was a point mutation at the consensus sequence of the splice donor site of intron 2, causing exon 2 skipping.

journal_name

J Inherit Metab Dis

authors

Isogai K,Sukegawa K,Tomatsu S,Fukao T,Song XQ,Yamada Y,Fukuda S,Orii T,Kondo N

doi

10.1023/a:1005363414792

subject

Has Abstract

pub_date

1998-02-01 00:00:00

pages

60-70

issue

1

eissn

0141-8955

issn

1573-2665

journal_volume

21

pub_type

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