Mutations in X-linked PORCN, a putative regulator of Wnt signaling, cause focal dermal hypoplasia

Nat Genet. 2007 Jul;39(7):836-8. doi: 10.1038/ng2057. Epub 2007 Jun 3.


Focal dermal hypoplasia is an X-linked dominant disorder characterized by patchy hypoplastic skin and digital, ocular and dental malformations. We used array comparative genomic hybridization to identify a 219-kb deletion in Xp11.23 in two affected females. We sequenced genes in this region and found heterozygous and mosaic mutations in PORCN in other affected females and males, respectively. PORCN encodes the human homolog of Drosophila melanogaster porcupine, an endoplasmic reticulum protein involved in secretion of Wnt proteins.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acyltransferases
  • Base Sequence
  • Chromosomes, Human, X / genetics*
  • Female
  • Focal Dermal Hypoplasia / genetics*
  • Genes, X-Linked / genetics*
  • Humans
  • Male
  • Membrane Proteins / genetics*
  • Point Mutation
  • Sequence Deletion*
  • Signal Transduction / genetics*
  • Wnt Proteins / physiology*


  • Membrane Proteins
  • Wnt Proteins
  • Acyltransferases
  • PORCN protein, human