Identification of a novel mutation R42P in the gap junction protein beta-3 associated with autosomal dominant erythrokeratoderma variabilis.

Abstract

We report a missense mutation in the gap junction protein beta-3 (encoding Connexin 31), which was detected in only the affected members of a family in which the autosomal dominant skin disease erythrokeratoderma variabilis was segregating. The nucleotide change results in an arginine to proline substitution in codon 42. This residue is positioned on the first transmembrane/first extracellular domain of the gap junction protein with the mutation replacing a negatively charged residue with a nonpolar residue. This change may disrupt the conformation of the protein and voltage gating polarity leading to impaired channel function.

• Authors: A Wilgoss, I M Leigh, M R Barnes, P Dopping-Hepenstal, R A Eady, J M Walter, C T Kennedy, D P Kelsell
• Journal: The Journal of investigative dermatology (J Invest Dermatol) Vol. 113 Issue 6 Pg. 1119-22 (Dec 1999) ISSN: 0022-202X [Print] United States
• PMID: 10594760 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Connexins
• GJB3 protein, human

Topics

• Connexins (genetics)
• Dermatitis, Exfoliative (genetics, pathology)
• Female
• Humans
• Ichthyosis (genetics, pathology)
• Keratosis (genetics, pathology)
• Male
• Mutation