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Related Experiment Videos

Rotary DNA motors

C Doering1, B Ermentrout, G Oster

  • 1Center for Nonlinear Studies, Los Alamos National Laboratory, New Mexico 87545, USA.

Biophysical Journal
|December 1, 1995
PubMed
Summary
This summary is machine-generated.

This study introduces a novel model for molecular motor function, proposing that fluctuating electrostatic fields driven by nucleotide hydrolysis generate force for DNA translocation. This mechanism explains DNA helicase and portal protein movement and may apply to other motors like flagellar motors.

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Biochemistry

Background:

  • Many molecular motors exhibit unidirectional movement along DNA, powered by nucleotide hydrolysis.
  • These motors are typically multimeric ATPases with multiple hydrolysis sites.

Purpose of the Study:

  • To present a novel model for force generation in molecular motors.
  • To explain the mechanism of DNA translocation by these motors.

Main Methods:

  • Development of a theoretical model for force generation.
  • Application of the model to explain the function of specific molecular motors.

Main Results:

  • A novel mechanism for force generation based on a fluctuating electrostatic field driven by nucleotide hydrolysis is proposed.

Related Experiment Videos

  • This model explains the motion of DNA helicases and bacteriophage portal proteins.
  • The model accounts for motor direction reversal without major structural changes and suggests applicability to ion-gradient-driven motors.

    • Conclusions:

    • The fluctuating electrostatic field model provides a unified explanation for diverse molecular motor functions.
    • This mechanism may be applicable to bacterial flagellar motors and ATP synthase, suggesting a common principle in biological energy transduction.