CAG-encoded polyglutamine length variation in the human genome
Author Information
Author(s): Butland Stefanie L, Devon Rebecca S, Huang Yong, Mead Carri-Lyn, Meynert Alison M, Neal Scott J, Lee Soo Sen, Wilkinson Anna, Yang George S, Yuen Macaire MS, Hayden Michael R, Holt Robert A, Leavitt Blair R, Ouellette BF Francis
Primary Institution: University of British Columbia
Hypothesis
To determine the length distributions of CAG-polyglutamine tracts for the entire human genome in a set of healthy individuals.
Conclusion
This publication provides the normal distributions of CAG-polyglutamine repeats in the human genome, which can help identify pathogenic expansions.
Supporting Evidence
- The study identified eight priority candidate genes for polyglutamine expansion disorders.
- Twelve CAG-polyglutamine repeats were found to be invariant.
- The best predictors of known disease genes were long CAG-tracts and high length variance.
Takeaway
Scientists studied a part of our DNA that can change length and found out how long these changes usually are in healthy people, which helps in understanding diseases.
Methodology
Fragment analysis of PCR-amplified repeat regions was used to assess CAG-tract lengths in a control population.
Limitations
The study may not account for all genetic variations across different populations.
Participant Demographics
Healthy individuals of mixed ethnic background.
Statistical Information
P-Value
0.002
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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