Comment on "Regularizing capacity of metabolic networks"

TL;DR

This paper critiques prior work on metabolic network stability by reanalyzing data with a more detailed kinetic model, challenging previous conclusions about the role of network structure in stability.

Contribution

It introduces a more detailed kinetic modeling approach to reassess metabolic network stability, questioning earlier findings based on simplified dynamics.

Findings

Previous conclusions about network structure and stability are inconsistent with detailed kinetic analysis.

Simplified models may overlook critical factors influencing metabolic stability.

Calls for more comprehensive modeling in metabolic network studies.

Abstract

In a recent paper, Marr, Muller-Linow and Hutt [Phys. Rev. E 75, 041917 (2007)] investigate an artificial dynamic system on metabolic networks. They find a less complex time evolution of this dynamic system in real networks, compared to networks of reference models. The authors argue that this suggests that metabolic network structure is a major factor behind the stability of biochemical steady states. We reanalyze the same kind of data using a dynamic system modeling actual reaction kinetics. The conclusions about stability, from our analysis, are inconsistent with those of Marr et al. We argue that this issue calls for a more detailed type of modeling.