Genetic linkage of mild pseudoachondroplasia (PSACH) to markers in the pericentromeric region of chromosome 19.

Abstract

Pseudoachondroplasia (PSACH) is a dominantly inherited form of short-limb dwarfism characterized by dysplastic changes in the spine, epiphyses, and metaphyses and early onset osteoarthropathy. Chondrocytes from affected individuals accumulate an unusual appearing material in the rough endoplasmic reticulum, which has led to the hypothesis that a structural abnormality in a cartilage-specific protein produces the phenotype. We recently identified a large family with a mild form of pseudoachondroplasia. By genetic linkage to a dinucleotide repeat polymorphic marker (D19S199), we have localized the disease gene to chromosome 19 (maximum lod score of 7.09 at a recombination fraction of 0.03). Analysis of additional markers and recombinants between the linked markers and the phenotype suggests that the disease gene resides within a 6.3-cM interval in the immediate pericentromeric region of the chromosome.

• Authors: M D Briggs, I M Rasmussen, J L Weber, J Yuen, K Reinker, A P Garber, D L Rimoin, D H Cohn
• Journal: Genomics (Genomics) Vol. 18 Issue 3 Pg. 656-60 (Dec 1993) ISSN: 0888-7543 [Print] United States
• PMID: 8307576 (Publication Type: Case Reports, Journal Article, Research Support, U.S. Gov't, P.H.S.)

Chemical References

• Genetic Markers

Topics

• Achondroplasia (genetics)
• Alleles
• Chromosome Mapping
• Chromosomes, Human, Pair 19
• Female
• Genetic Linkage
• Genetic Markers
• Genotype
• Humans
• Lod Score
• Male
• Pedigree
• Recombination, Genetic