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Related Experiment Videos

The cystic fibrosis locus.

R Williamson1, B Wainwright, C Cooper

  • 1Department of Biochemistry, St. Mary's Hospital Medical School, University of London, UK.

Enzyme
|January 1, 1987
PubMed
Summary

Researchers identified the cystic fibrosis (CF) gene location on chromosome 7. They pinpointed a candidate gene sequence that consistently segregates with CF, advancing the study of single-gene disorders.

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Area of Science:

  • Human Genetics
  • Molecular Biology
  • Medical Research

Background:

  • Cystic Fibrosis (CF) is a single-gene disorder with an unknown biochemical basis.
  • Identifying the specific gene responsible for CF is crucial for understanding its pathology.
  • Previous candidate genes were proposed but not confirmed.

Purpose of the Study:

  • To identify the genetic locus of Cystic Fibrosis (CF).
  • To isolate and characterize the gene responsible for CF.
  • To develop a model for studying single-gene defects with unknown biochemical lesions.

Main Methods:

  • Exclusion mapping using polymorphic DNA and protein markers.
  • Chromosome-mediated gene transfer to isolate human chromosome fragments.
  • Cosmid contig mapping, pulse-field gel electrophoresis, and HTF island identification.
  • Linkage disequilibrium analysis to identify candidate sequences.

Main Results:

  • The CF locus was mapped to the long arm of human chromosome 7.
  • Key flanking markers were identified, aiding in gene isolation.
  • A candidate coding sequence was identified that consistently segregates with CF.

Conclusions:

  • The study successfully localized the CF gene and identified a strong candidate sequence.
  • This work provides a foundational model for investigating other single-gene disorders.
  • The identified candidate sequence is a significant step towards understanding CF's molecular basis.

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