Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Structural factors determining DNA length limitations in conformation-sensitive mutation detection methods.

Piotr Kozlowski1, Wlodzimierz J Krzyzosiak

  • 1Laboratory of Cancer Genetics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland.

Electrophoresis
|December 30, 2004
PubMed
Summary

Mutation detection using DNA structural changes is less effective in longer DNA fragments due to masking secondary structures and increased single-nucleotide polymorphisms (SNPs). Understanding these factors improves gene scanning efficiency.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

BCL2 promoter region mutations are an independent marker of BCL2 level in lymphoid malignancies.

NPJ genomic medicine·2026
Same author

Genomic context of mutations in MIR142 in blood cancers: summary and integrative analysis.

Cellular & molecular biology letters·2026
Same author

CAG-targeting artificial miRNA with reduced off-target risk for efficient lowering of pathogenic polyglutamine proteins.

NAR molecular medicine·2026
Same author

Genotype-based prevalence of Birt-Hogg-Dubé syndrome in the healthcare and genomic registry populations - breaking the 'rare disease' status?

NPJ genomic medicine·2026
Same author

miRNA gene mutations commonly disrupt the proper functioning of miRNA genes.

Science advances·2026
Same author

The role of gut mycobiome in responses to cancer immunotherapy.

Gut microbes·2025

Area of Science:

  • Genetics
  • Molecular Biology
  • Biotechnology

Background:

  • Accurate identification of genetic mutations and polymorphisms is crucial for understanding human diseases.
  • Mutation scanning methods relying on structural change-induced mobility shifts are effective but show DNA length sensitivity.
  • The underlying reasons for reduced efficiency in longer DNA fragments remain poorly understood.

Purpose of the Study:

  • To elucidate why mutation scanning is less effective in longer DNA fragments.
  • To identify the specific factors contributing to reduced mutation detection rates in longer DNA sequences.
  • To provide insights for optimizing gene scanning strategies.

Main Methods:

  • Systematic analysis of sequence variants in exon 11 of the BRCA1 gene.

Related Experiment Videos

  • Utilized DNA fragments of three different lengths.
  • Employed combined single-strand conformation polymorphism (SSCP) and heteroduplex analysis (DA) via capillary electrophoresis (CE).

    • Main Results:

    • Two primary structural factors reduce mutation detection in long amplicons: masking by other secondary structures and increased frequency of single-nucleotide polymorphisms (SNPs).
    • In longer fragments, additional secondary structure modules can obscure mutation-induced structural changes.
    • Higher SNP frequency in longer fragments complicates distinguishing mutation effects from polymorphic variants.

    Conclusions:

    • The efficiency of mutation scanning methods is significantly influenced by DNA fragment length.
    • Increased secondary structure complexity and higher SNP prevalence in longer DNA fragments are key limitations.
    • Accounting for these factors is essential for developing efficient gene scanning protocols using conformation-sensitive methods.