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

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Abstract

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 qualitatively explains some of the experimental observations.

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Authors and Affiliations

  1. Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, 781 039, India

    Manish Agrawal, Rajat Anand & Rajaram Swaminathan

  2. Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781 039, India

    S. B. Santra

Authors
  1. Manish Agrawal
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  2. S. B. Santra
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  3. Rajat Anand
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  4. Rajaram Swaminathan
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Correspondence to S. B. Santra.

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Agrawal, M., Santra, S.B., Anand, R. et al. Effect of macromolecular crowding on the rate of diffusion-limited enzymatic reaction. Pramana - J Phys 71, 359–368 (2008). https://doi.org/10.1007/s12043-008-0169-y

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  • DOI: https://doi.org/10.1007/s12043-008-0169-y

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