Novel TGM5 mutations in acral peeling skin syndrome

Jaap J. A. J. van der Velden*, Michel van Geel, Ruud G. L. Nellen, Marcel F. Jonkman, John A. McGrath, Arti Nanda, Eli Sprecher, Maurice A. M. van Steensel, W. H. Irwin McLean, Andrew J. Cassidy

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Acral peeling skin syndrome (APSS, MIM #609796) is a rare autosomal recessive disorder characterized by superficial exfoliation and blistering of the volar and dorsal aspects of hands and feet. The level of separation is at the junction of the stratum granulosum and stratum corneum. APSS is caused by mutations in the TGM5 gene encoding transglutaminase-5, which is important for structural integrity of the outermost epidermal layers. The majority of patients originate from Europe and carry a p.(Gly113Cys) mutation in TGM5. In this study, we report both European and non-European families carrying other mutations in the TGM5 gene. In 5 patients, we found 3 novel mutations: c.1001+2_1001+3del, c.1171G>A and c.1498C>T. To confirm their pathogenicity, we performed functional analyses with a transglutaminase activity assay, determined alternative splicing by reverse-transcribed PCR analysis and used databases and in silico prediction tools.
Original languageEnglish
Pages (from-to)285-289
JournalExperimental Dermatology
Issue number4
Publication statusPublished - Apr 2015


  • acral peeling skin syndrome
  • TGM5


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