Identification and characterization of a novel homozygous deletion in the alpha-N-acetylglucosaminidase gene in a patient with Sanfilippo type B syndrome (mucopolysaccharidosis IIIB).
Mol Genet Metab
; 100(1): 51-6, 2010 May.
Article
en En
| MEDLINE
| ID: mdl-20138557
ABSTRACT
Sanfilippo syndrome type B (mucopolysaccharidosis IIIB) is an autosomal recessive disease that is caused by a deficiency of the lysosomal enzyme alpha-N-acetylglucosaminidase (NAGLU). Over 100 different mutations in the NAGLU gene have been identified in Sanfilippo syndrome type B patients; however, no large deletions have been reported. Here we present the first case of a large homozygous intragenic NAGLU gene deletion identified in an affected child of consanguineous parents. Long range and multiplex PCR methods were used to characterize this deletion which encompasses exons 3 and 4 and is 1146 base pairs long. We propose that Alu element-mediated unequal homologous recombination between an Alu-Y in intron 2 and an Alu-Sx in intron 4 is the likely mechanism for this deletion, thereby contributing further insight into the molecular etiology of this disorder and providing additional evidence of its allelic heterogeneity.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Acetilglucosaminidasa
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Mucopolisacaridosis III
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Child
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Female
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Humans
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Infant
Idioma:
En
Revista:
Mol Genet Metab
Asunto de la revista:
BIOLOGIA MOLECULAR
/
BIOQUIMICA
/
METABOLISMO
Año:
2010
Tipo del documento:
Article
País de afiliación:
Estados Unidos