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. 1988 Nov;43(5):756–763.

Identification of a mutation in the structural alpha-L-fucosidase gene in fucosidosis.

P J Willems 1, J K Darby 1, R A DiCioccio 1, P Nakashima 1, C Eng 1, K A Kretz 1, L L Cavalli-Sforza 1, E M Shooter 1, J S O'Brien 1
PMCID: PMC1715535  PMID: 2903668

Abstract

Fucosidosis is an autosomal recessive lysosomal storage disorder characterized by progressive neurological deterioration and mental retardation. The disease results from deficient activity of alpha-L-fucosidase (E.C.3.2.1.51), a lysosomal enzyme that hydrolyzes fucose from fucoglycoconjugates. In an attempt to identify the mutation(s) that result(s) in fucosidosis, we performed Southern blot analysis of the structural gene encoding alpha-L-fucosidase (FUCA 1) in 23 patients affected with fucosidosis. In five patients Southern blot analysis showed obliteration of an EcoRI restriction site in the open reading frame of FUCA 1 encoding mature alpha-L-fucosidase. This abnormality was not observed in 80 controls, and it may be the basic defect responsible for fucosidosis in these patients. Both patients with the severe type I form of fucosidosis and patients with the less severe type II were shown to be homozygous for this presumed mutation. In the remaining 18 patients the EcoRI site obliteration, major-gene deletions, or insertions were not detected. This suggests that at least two different mutations are involved in fucosidosis. The heterogeneity found at the DNA level was not present at the protein level, as all fucosidosis patients investigated had low fucosidase protein (less than 6% of normal) and negligible fucosidase activity in fibroblasts and lymphoblastoid cell lines.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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