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Eur J Hum Genet. 2008 Dec;16(12):1499-506. doi: 10.1038/ejhg.2008.132. Epub 2008 Jul 16.

Axonal neuropathy with unusual pattern of amyotrophy and alacrima associated with a novel AAAS mutation p.Leu430Phe.

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1
Children's Hospital, Technical University Dresden, Dresden, Germany.

Abstract

The triple A syndrome is caused by autosomal recessively inherited mutations in the AAAS gene and is characterized by achalasia, alacrima and adrenal insufficiency as well as progressive neurological impairment. We report on a 14-year-old girl with slowly progressive axonal motor neuropathy with conspicuous muscle wasting of hypothenars and calves as well as alacrima. The mutation analysis of the AAAS gene revealed a compound heterozygous mutation: a c.251G>A mutation in exon 2 that had been reported previously, and a novel c.1288C>T mutation in exon 14. At the transcriptional level, the c.251G>A transition results in an aberrant splicing and decay of this RNA strand so that the particular clinical picture results from the novel c.1288C>T, (p.Leu430Phe, L430F) mutation in a hemizygous form. With transfection experiments, we demonstrate that GFP-ALADIN(L430F) correctly localizes to nuclear pore complexes. Therefore, we conclude that this point mutation impairs ALADIN function at the nuclear pore.

PMID:
18628786
DOI:
10.1038/ejhg.2008.132
[Indexed for MEDLINE]
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