Coupling of Two Motor Proteins: a New Motor Can Move Faster

Details Coupling of Two Motor Proteins: a New Motor Can Move Faster Coupling of Two Motor Proteins: a New Motor Can Move Faster

2005-02-19

arxiv.org/abs/cond-mat/0502474v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.94.238101

We study the effect of a coupling between two motor domains in highly-processive motor protein complexes. A simple stochastic discrete model, in which the two parts of the protein molecule interact through some energy potential, is presented. The exact analytical solutions for the dynamic properties of the combined motor species, such as the velocity and dispersion, are derived in terms of the properties of free individual motor domains and the interaction potential. It is shown that the coupling between the motor domains can create a more efficient motor protein that can move faster than individual particles. The results are applied to analyze the motion of helicase RecBCD molecules.

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