Autosomal dominant familial calcium pyrophosphate dihydrate deposition disease is caused by mutation in the transmembrane protein ANKH.

Williams, Charlene J; Zhang, Yun; Timms, Andrew; Bonavita, Gina; Caeiro, Francisco; Broxholme, John; Cuthbertson, Jonathan; Jones, Yvonne et al. · Am J Hum Genet · 2002

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Abstract

Familial autosomal dominant calcium pyrophosphate dihydrate (CPPD) chondrocalcinosis has previously been mapped to chromosome 5p15. We have identified a mutation in the ANKH gene that segregates with the disease in a family with this condition. ANKH encodes a putative transmembrane inorganic pyrophosphate (PPi) transport channel. We postulate that loss of function of ANKH causes elevated extracellular PPi levels, predisposing to CPPD crystal deposition.

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