Effect of macromolecular crowding on the rate of diffusion-limited enzymatic reaction

Details Effect of macromolecular crowding on the rate of diffusion-limited enzymatic reaction Effect of macromolecular crowding on the rate of diffusion-limited enzymatic reaction

2008-07-19

arxiv.org/abs/0807.3068v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 4 figures

Scientific paper

10.1007/s12043-008-0169-y

The cytoplasm of a living cell is crowded with several macromolecules of different shapes and sizes. Molecular diffusion in such a medium becomes anomalous due to the presence of macromolecules and diffusivity is expected to decrease with increase in macromolecular crowding. Moreover, many cellular processes are dependent on molecular diffusion in the cell cytosol. The enzymatic reaction rate has been shown to be affected by the presence of such macromolecules. A simple numerical model is proposed here based on percolation and diffusion in disordered systems to study the effect of macromolecular crowding on the enzymatic reaction rates. The model explains qualitatively some of the experimental observations.

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