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© Research
Publication : The Journal of investigative dermatology

Acrokeratosis verruciformis of Hopf is caused by mutation in ATP2A2: evidence that it is allelic to Darier’s disease

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of investigative dermatology - 01 Feb 2003

Dhitavat J, Macfarlane S, Dode L, Leslie N, Sakuntabhai A, MacSween R, Saihan E, Hovnanian A

Link to Pubmed [PMID] – 12542527

J. Invest. Dermatol. 2003 Feb;120(2):229-32

Acrokeratosis verruciformis of Hopf is a localized disorder of keratinization affecting the distal extremities. Onset is early in life and the disease is inherited in an autosomal dominant fashion. Although histology of acrokeratosis verruciformis lesions shows no evidence of dyskeratosis, a possible relationship with Darier’s disease has long been postulated on the basis of clinical similarity. ATP2A2 encoding the sarco(endo)plasmic reticulum Ca2+ ATPase2 pump has been identified as the defective gene in Darier’s disease. In this report, we studied a family affected with acrokeratosis verruciformis in six generations and identified a heterozygous P602L mutation in ATP2A2. This mutation predicts a nonconservative amino acid substitution in the ATP binding domain of the molecule. The mutation segregates with the disease phenotype in the family and was not found in 50 controls. Moreover, functional analysis of the P602L mutant showed that it has lost its ability to transport Ca2+. This result demonstrates loss of function of the sarco(endo)plasmic reticulum Ca2+ ATPase2 mutant in acrokeratosis verruciformis, thus providing evidence that acrokeratosis verruciformis and Darier’s disease are allelic disorders.

http://www.ncbi.nlm.nih.gov/pubmed/12542527