Mutations in the SASPase gene (ASPRV1) are not associated with atopic eczema or clinically dry skin.
Sandilands A, Brown SJ, Goh CS, Pohler E, Wilson NJ, Campbell LE, Miyamoto K, Kubo A, Irvine AD, Thawer-Esmail F, et al. J Invest Dermatol. 2012 May; 132(5):1507-10. Epub 2012 Feb 9.