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Phenotypic characterization of Corynebacterium glutamicum using elementary modes towards synthesis of amino acids

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Systems and Synthetic Biology

Abstract

Elementary flux mode (EFM) analysis is a powerful tool to represent the metabolic network structure and can be further utilized for flux analysis. The method enables characterization and quantification of feasible phenotypes in microbes. EFM analysis was employed to characterize the phenotype of Corynebacterium glutamicum to yield various amino acids. The metabolic network of C. glutamicum yielded 62 elementary modes by incorporating the accumulation of amino acids namely, lysine, alanine, valine, glutamine and glutamate. The analysis also allowed us to compute the maximum theoretical yield for the synthesis of various amino acids. These 62 elementary modes were further used to obtain optimal phenotypic space towards accumulation of biomass and lysine. The study indicated that the optimal solution space from 62 elementary modes forms a super space which incorporates various mutants including lysine producing strain of C. glutamicum. The analysis was also extended to obtain sensitivity of the network to variation in the stoichiometry of NADP in the definition of biomass.

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Authors and Affiliations

  1. Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai, 400076, India

    Devesh Radhakrishnan & K. V. Venkatesh

  2. Department of Biosciences & Bioengineering, Indian Institute of Technology, Bombay, Powai, Mumbai, 400076, India

    Meghna Rajvanshi & K. V. Venkatesh

Authors
  1. Devesh Radhakrishnan
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  2. Meghna Rajvanshi
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  3. K. V. Venkatesh
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Corresponding author

Correspondence to K. V. Venkatesh.

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Devesh Radhakrishnan, Meghna Rajvanshi contributed equally.

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Radhakrishnan, D., Rajvanshi, M. & Venkatesh, K.V. Phenotypic characterization of Corynebacterium glutamicum using elementary modes towards synthesis of amino acids. Syst Synth Biol 4, 281–291 (2010). https://doi.org/10.1007/s11693-011-9073-8

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