A YAC contig encompassing the recessive Stargardt disease gene (STGD) on chromosome Ip

K. L. Anderson, L. Baird, R. A. Lewis, A. C. Chinault, B. Otterud, M. Leppert, J. R. Lupski

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Stargardt disease (STGD) and fundus flavimaculatus are infrequent autosomal recessive conditions characterized by a juvenile macular dystrophy and variable degrees of peripheral retinal changes. Linkage analysis performed in 47 STGD/fundus flavimaculatus families demonstrated significant linkage to 13 polymorphic DNA markers on chromosome 1p. The maximum combined two-point led score was 32.7 (maximum recombination fraction [θ(max)] = .006) with the polymorphic marker D1S188. Our data demonstrate that STGD and fundus flavimaculatus are the same disorder clinically and genetically and provide further evidence for genetic homogeneity of this phenotype. Analysis of recombination events on disease chromosomes placed the STGD gene within a 4-cM interval between markers D1S435 and D1S236. A physical map was constructed of a YAC contig flanking STGD, from markers D1S500 to D1S495, and includes the critical interval delineated by historical recombinants. This contig spans ~31 cM, with one gap (3-5 cM) that is outside the 4-cM critical region. Localization of STGD to a single YAC contig will facilitate its positional cloning.

Original languageEnglish (US)
Pages (from-to)1351-1363
Number of pages13
JournalAmerican Journal of Human Genetics
Volume57
Issue number6
StatePublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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