Published in:
01-09-2005 | Short Communication
Identification of a novel ADAR mutation in a Chinese family with dyschromatosis symmetrica hereditaria (DSH)
Authors:
Qinghe Xing, Mingtai Wang, Xiangdong Chen, Xueqing Qian, Wei Qin, Jianjun Gao, Shengnan Wu, Rui Gao, Guoyin Feng, Lin He
Published in:
Archives of Dermatological Research
|
Issue 3/2005
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Abstract
Dyschromatosis symmetrica hereditaria (DSH [MIM 127400]) is characterized by the presence of hyperpigmented and hypopigmented macules mostly on the dorsal aspects of the extremities. Genetic studies have identified mutations in the ADAR gene, encoding double-stranded RNA-specific adenosine deaminase, to be responsible for this disorder. Here, we found a novel deletion mutation in the ADAR gene, 2929delA, in a Chinese family with DSH. This mutation is located in codon 977 (AGC→GC), and leads to a frameshift and truncated protein of 250 amino acids with 76 novel amino acids prior to a premature stop codon. The truncated ADAR is predicted to lack the ADEAMc (tRNA-specific and double-stranded RNA adenosine deaminase) domain. This study should be useful for genetic counseling and prenatal diagnosis for affected families and in expanding the database on ADAR gene mutations in DSH.