ATP2A2 and dentin dysplasia: Dd is a rare autosomal dominant inherited skin disorder, with variable expressivity, caused by a gene mutation on chromosome 12q23–24.1 [3] and identified in 1999 as a mutation in ATP2A2, encoding the sarco/endoplasmic reticulum ATPase type 2 (SERCA2), a calcium pump distributed throughout the endoplasmic reticulum [4].