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Related Experiment Videos

Flexing and folding double helical DNA

W K Olson1, M S Babcock, A Gorin

  • 1Department of Chemistry, Rutgers, State University of New Jersey, New Brunswick 08903, USA.

Biophysical Chemistry
|June 1, 1995
PubMed
Summary
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DNA base sequences dictate three-dimensional structures that influence gene activity. Computational models reveal how DNA's double helix flexibility, sequence-dependent bending, and twisting impact its biological functions.

Area of Science:

  • Molecular Biology
  • Biophysics
  • Computational Chemistry

Background:

  • DNA base sequence is recognized for its structural role in modulating gene activity.
  • Nucleic acid sequences define three-dimensional structures with unique properties.
  • DNA double helix can undergo tertiary folding, albeit gradually and on a larger scale than proteins.

Purpose of the Study:

  • To understand how local DNA structural irregularities translate to the macromolecular level.
  • To investigate how DNA structure is recognized by proteins.
  • To probe the structure and properties of the DNA double helix.

Main Methods:

  • Utilized a combination of computational techniques.
  • Incorporated sequence-dependent bending, twisting, and translation of dimeric fragments into computer models.

Related Experiment Videos

  • Developed new base sequence-dependent elastic energy potentials based on B-DNA crystallographic data.

    • Main Results:

    • Computer models of open and closed DNA structures were created.
    • The study monitored the extent to which the double helix can bend and twist.
    • Sequence-dependent DNA structural properties were quantified.

    Conclusions:

    • DNA base sequence is a critical determinant of its three-dimensional structure and biological function.
    • Computational modeling provides insights into DNA's mechanical properties and sequence recognition.
    • Understanding DNA's structural flexibility is key to deciphering its interactions with proteins.