Identical Glycine Substitution Mutations in Type VII Collagen May Underlie Both Dominant and Recessive Forms of Dystrophic Epidermolysis Bullosa

Noor Almaani, Lu Liu, Patricia J. C. Dopping-Hepenstal, Joey E. Lai-Cheong, Alvin Wong, Arti Nanda, Celia Moss, Anna E. Martinez, Jemima E. Mellerio, John A. McGrath

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Autosomal dominant and recessive forms of dystrophic epidermolysis bullosa (DEB) result from mutations in the type VII collagen gene (COL7A1). Although paradigms have emerged for genotype/phenotype correlation in DEB, some pathogenic mutations in COL 7A1, notably glycine substitutions within the type VII collagen triple helix, may lead to diagnostic difficulties, since certain glycine substitutions can result in either dominant or recessive mutant alleles. Delineation of glycine substitution mutations into two discrete groups, however, is made difficult by observations that, for some particular glycine substitutions in type VII collagen, the same mutation can result in both dominant and recessive disease. In this report we describe four further glycine missense mutations: p.Gly1483Asp, p.Gly1770Ser, p.Gly2213Arg and p.Gly2369Ser, which can lead to either dominant or recessive DEB, and which result in a spectrum of clinical abnormalities. We also identify a further 30 new glycine substitution mutations that cause either dominant or recessive DEB, but not both. In screening the COL 7A1 gene for mutations in individuals with DEB our data highlight that delineation of glycine substitutions in type VII collagen has important implications for genetic counselling.
Original languageEnglish
Pages (from-to)262 - 266
Number of pages5
JournalActa Dermato-Venereologica
Volume91
Issue number3
DOIs
Publication statusPublished - May 2011

Fingerprint

Dive into the research topics of 'Identical Glycine Substitution Mutations in Type VII Collagen May Underlie Both Dominant and Recessive Forms of Dystrophic Epidermolysis Bullosa'. Together they form a unique fingerprint.

Cite this