Genetic and physical mapping of the locus for autosomal dominant renal Fanconi syndrome, on chromosome 15q15.3

Autosomal dominant renal Fanconi syndrome is a genetic model for the study of proximal renal tubular transport pathology. We were able to map the locu s for this disease to human chromosome 15q15.3 by genotyping a central Wisc onsin pedigree with 10 affected individuals. After a whole-genome scan with highly polymorphic simple sequence repeat markers, a maximum LOD score of 3.01 was calculated for marker D15SG53 on chromosome 15q15.3. Linkage and h aplotype analysis for an additional 24 markers flanking D15SG53 narrowed th e interval to similar to3 cM, with the two highest single-point LOD scores observed being 4.44 and 4.68 (for D15S182 and D15S537, respectively). Subse quently, a complete bacterial artificial chromosome contig was constructed, from the High Throughput Genomic Sequence Database, for the region bounded by D15S182 and D15S143. The identification of the gene and gene product al tered in autosomal dominant renal Fanconi syndrome will allow the study of the physiology of proximal renaI tubular transport.