A novel missense mutation in exon 3 of the COL4A5 gene associated with late-onset Alport syndrome |
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| Authors: | Alberto E. Turco Sandro Rossetti M. Olivia Biasi Gianfranco Rizzoni Laura Massella Niina H. Saarinen Allessandra Renieri Pier Franco Pignatti Mario De Marchi |
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| Affiliation: | Institute of Genetics, University of Verona School of Medicine, University Hospital Polyclinic "Borgo Roma", Verona, Italy;Pediatric Hospital "Bambino Gesu", Division of Nephrology, IRCCS, Rome, Italy;Biocenter and Department of Biochemistry, University of Oulu, Oulu, Finland;Department of Molecular Biology and Medical Genetics, University of Siena, Siena, Italy;Department of Clinical and Biological Sciences, University of Torino, Orbassano, Italy |
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| Abstract: | We have identified a novel missense transition (362G→A) in exon 3 of the COL4A5 gene in a male patient with late-onset Alport syndrome. We used non-isotopic single strand conformation polymorphism, heteroduplex analysis, and automated DNA sequencing. The mutation changes a conserved glycine at codon 54 for an aspartic acid (Gly54Asp), which abolishes a BstNI site. Using restriction analysis, we identified the heterozygous carrier status in the two daughters of the proband. Our findings are in keeping with the hypothesis that slower progressive forms of Alport syndrome are more often associated with missense mutations rather than large deletions or frameshifts. This is the first mutation described in the N-terminus triple helical 7S domain of the COL4A5 gene in an Alport syndrome patient. |
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| Keywords: | Alport syndrome COL4A5 gene heteroduplex analysis mutation detection SSDP analysis |
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