IDUA mutational profiling of a cohort of 102 European patients with mucopolysaccharidosis type I: identification and characterization of 35 novel α-L-iduronidase (IDUA) alleles.
نویسندگان
چکیده
Mutational analysis of the IDUA gene was performed in a cohort of 102 European patients with mucopolysaccharidosis type I. A total of 54 distinct mutant IDUA alleles were identified, 34 of which were novel including 12 missense mutations, 2 nonsense mutations, 12 splicing mutations, 5 micro-deletions, 1 micro-duplication 1 translational initiation site mutation, and 1 'no-stop' change (p.X654RextX62). Evidence for the pathological significance of all novel mutations identified was sought by means of a range of methodological approaches, including the assessment of evolutionary conservation, RT-PCR/in vitro splicing analysis, MutPred analysis and visual inspection of the 3D-model of the IDUA protein. Taken together, these data not only demonstrate the remarkable mutational heterogeneity characterizing type 1 mucopolysaccharidosis but also illustrate our increasing ability to make deductions pertaining to the genotype-phenotype relationship in disorders manifesting a high degree of allelic heterogeneity.
منابع مشابه
A novel p.E276K IDUA mutation decreasing α-L-iduronidase activity causes mucopolysaccharidosis type I
PURPOSE To characterize the pathogenic mutations causing mucopolysaccharidosis type I (MPS I) in two Thai patients: one with Hurler syndrome (MPS IH), the most severe form, and the other with Scheie syndrome (MPS IS), the mildest. Both presented with distinctive phenotype including corneal clouding. METHODS The entire coding regions of the α-L-iduronidase (IDUA) gene were amplified by PCR and...
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Mucopolysaccharidosis type I (MPSI) is a rare autosomal recessive disorder caused by mutations in the gene encoding the lysosomal enzyme α-l-iduronidase (IDUA), which is instrumental in the hydrolysis of the glycosaminoglycans, dermatan and heparan sulfate. The accumulation of unhydrolyzed glycosaminoglycans leads to pathogenesis in multiple tissue types, especially those of skeletal, nervous, ...
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متن کاملشناسایی و تشخیص مولکولی جهش های ژن آلفا-ال- ایدورونیداز در 5 خانواده ایرانی مبتلا به سندرم هورلر ( موکوپلی ساکاریدوز 1)
Introduction: Mucopolysaccharidosis I (MPS-I) is an autosomal recessive lysosomal storage diseases, caused by α-L-iduronidase (IDUA) enzyme deficiency. The clinical manifestations of MPS-I patients are variable ranging from severe to mild, and therefore prediction of disease severity is difficult. From when IDUA gene has been cloned more than 109 distinct mutations have been identified in it an...
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ورودعنوان ژورنال:
- Human mutation
دوره 32 6 شماره
صفحات -
تاریخ انتشار 2011