Human Molecular Genetics, 2000, Vol. 9, No. 7 1131-1140
© 2000 Oxford University Press
HaileyHailey disease is caused by mutations in ATP2C1 encoding a novel Ca2+ pump
1Max-Planck-Institut für Molekulare Genetik, D-14195 Berlin, Germany, 2The Wellcome Trust Centre for Human Genetics, University of Oxford, OX3 7BN, UK, 3Human Genetics Unit, School of Biochemistry and Genetics, University of Newcastle Newcastle upon Tyne, NE1 7RU, UK, 4Department of Dermatology, Southampton General Hospital, Southampton, SO16 6YD, 5Department of Dermatology, General Hospital, Kandy, Sri Lanka, 6Department of Dermatology, La Miletrie Hospital, Poitiers, France, 7Cabinet Médical Wilson, Limeil-Brévannes, France, 8Department of Dermatology, Southern General Hospital, Glasgow, G51 4TF, UK and 9Department of Dermatology, Churchill Hospital, Oxford, OX3 7LJ, UK
HaileyHailey disease (HHD) is an autosomal dominant skin disorder characterized by suprabasal cell separation (acantholysis) of the epidermis. Previous genetic linkage studies localized the gene to a 5 cM interval on human chromosome 3q21. After reducing the disease critical region to <1 cM, we used a positional cloning strategy to identify the gene ATP2C1, which is mutated in HHD. ATP2C1 encodes a new class of P-type Ca2+-transport ATPase, which is the homologue for the rat SPLA and the yeast PMR1 medial Golgi Ca2+ pumps and is related to the sarco(endo)plasmic calcium ATPase (SERCA) and plasma membrane calcium ATPase (PCMA) families of Ca2+ pumps. The predicted protein has the same apparent transmembrane organization and contains all of the conserved domains present in other P-type ATPases. ATP2C1 produces two alternative splice variants of ~4.5 kb encoding predicted proteins of 903 and 923 amino acids. We identified 13 different mutations, including nonsense, frameshift insertion and deletions, splice-site mutations, and non-conservative missense mutations. This study dem- onstrates that defects in ATP2C1 cause HHD and together with the recent identification of ATP2A2 as the defective gene in Dariers disease, provide further evidence of the critical role of Ca2+ signaling in maintaining epidermal integrity.
+ To whom correspondence should be addressed. Tel: +44 1865 287 502; Fax: +44 1865 287 650; Email: anthony.monaco@well.ox.ac.uk
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