A novel mutation in the second half of the keratin 17 1A domain in a large pedigree with delayed-onset pachyonychia congenita type 2

作者：Xiao SX^*; Feng YG; Ren XR; Tan SS; Li L; Wang JM; Shi YZ

来源：Journal of Investigative Dermatology, 2004, 122(4): 892-895.

DOI：10.1111/j.0022-202X.2004.22408.x

• ectodermal dysplasia
• genodermatosis
• intermediate filaments
• nail dystrophy

Pachyonychia congenita type 2 (PC-2), also known as Jackson-Lawler type PC, is an autosomal dominant disorder characterized by hypertrophic nail dystrophy associated with focal keratoderma and multiple pilosebaceous cysts. We report a large Chinese pedigree of typical delayed-onset PC-2 that includes 19 affected members. Direct sequencing of PCR products revealed a novel heterozygous 325A-->G mutation in the affected members. This mutation predicts the substitution of asparagine by aspartic acid in codon 109 (N109D) located in the second half of the keratin 17 1A domain, where similar mutation in keratin 5 is associated with the mild Weber-Cockayne form of epidermolysis bullosa simplex.

• 出版日期2004-4
• 单位西安交通大学