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Twelve new polymorphic microsatellites on human chromosome 22
J C Porter1, K T Ram, J M Puck
1Division of Infectious Diseases and Immunology, Children's Hospital of Philadelphia, PA 19104.
Genomics
|January 1, 1993
Summary
Researchers developed 15 new microsatellite markers for human chromosome 22. Twelve of these sequence-tagged sites (STSs) are polymorphic, aiding in genetic mapping and disease gene discovery.
Area of Science:
- Genetics
- Molecular Biology
- Human Genome Research
Background:
- Developing polymorphic markers is crucial for genetic mapping of the human genome.
- Human chromosome 22 requires robust tools for accurate gene localization and disease association studies.
Purpose of the Study:
- To construct polymorphic Sequence Tagged Sites (STSs) using microsatellite repeats for human chromosome 22.
- To identify and characterize new genetic markers for enhanced mapping capabilities.
Main Methods:
- Screening a plasmid library of chromosome 22 DNA with a poly(AC) probe.
- Utilizing sequencing techniques to identify poly(TG) targets and designing flanking primers.
- Employing Polymerase Chain Reaction (PCR) for screening and determining marker heterozygosity and localization.
Main Results:
- 15 poly(TG) microsatellite markers were generated from human chromosome 22.
- Twelve of the 15 STSs proved to be polymorphic.
- Seven markers were localized to the 22q12 band, with others in adjacent 22q subregions.
Conclusions:
- The newly developed polymorphic markers are valuable for mapping disease loci on chromosome 22.
- These markers facilitate linkage analysis and PCR-based contig construction for chromosome 22.
- The findings contribute to the ongoing comprehensive mapping of human chromosome 22.