[Keratin 17 mutation in pachyonychia congenita type 2 in a Chinese Han family].

Research paper by Shi-de SD Zhang, Zhen-xing ZX Lin, Zheng-hua ZH Zhang, Jing-jing JJ Liu, Wei W Tian, Jing-jun JJ Zhao

Indexed on: 03 Feb '11Published on: 03 Feb '11Published in: Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics


To investigate the keratin 17 gene (KRT17) mutation in a pedigree with pachyonychia congenita type 2 (PC-II).DNA was extracted from the blood samples of the patients, unaffected members of the pedigree, and 100 unrelated healthy controls. PCR was performed to amplify the hot spots in KRT17 gene. PCR products were directly sequenced to detect mutation.A heterozygous 296T-->C mutation was found in all the affected members of this family, which resulted in the substitution of leucine by proline in codon 99 (L99P) in the 1A domain of the KRT17, but not in the healthy individuals from the family and the 100 unrelated controls.The mutation of KRT17 may play a major role in the pathogenesis of this pedigree with pachyonychia congenita type 2.