BER launches Environmental System Science Program. Visit our new website under construction!

U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


Finding a Steady-State Solution in Dynamical Biological Networks
Published: December 07, 2012
Posted: November 20, 2012

Cellular biochemical networks govern biological function and are strongly influenced by the exchange of molecules between the cell and its environment. Modeling this exchange process and its impact on cellular networks for whole microbial cells will be a key step in developing biology-based applications in bioenergy and other Department of Energy (DOE) mission areas. However, it has been a problem to represent nutrient exchange with the environment for genome-scale kinetic models, in a manner consistent with the existence of a steady state. New research has developed a mathematical model that establishes sufficient conditions for a non-equilibrium steady-state for cellular biochemical networks. The research proves the theorem that reactions conserving mass and kinetic rate laws are sufficient conditions for the existence of a non-equilibrium steady state. The new study demonstrates how to mathematically model the exchange of molecules between any cell and its environment. The results of this DOE Scientific Discovery through Advanced Computing (SciDAC) research by Fleming and Thiele of the University of Iceland are foundational for future efforts to computationally model non-equilibrium steady states as part of  whole cell microbial models.

Reference: Fleming, R. M. T., and I. Thiele. 2012. “Mass Conserved Elementary Kinetics Is Sufficient for the Existence of a Non-Equilibrium Steady State Concentration,” Journal of Theoretical Biology 314, 173–81. DOI: 10.1016/j.jtbi.2012.08.021. (Reference link)

Contact: Christine Chalk, SC-21.1, (301) 903-5152, Susan Gregurick, SC-23.2, (301) 903-7672
Topic Areas:

  • Research Area: Microbes and Communities
  • Research Area: Sustainable Biofuels and Bioproducts
  • Research Area: Computational Biology, Bioinformatics, Modeling
  • Cross-Cutting: Scientific Computing and SciDAC

Division: SC-33.2 Biological Systems Science Division, BER

 

BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Mar 23, 2021
Molecular Connections from Plants to Fungi to Ants
Lipids transfer energy and serve as an inter-kingdom communication tool in leaf-cutter ants&rsqu [more...]

Mar 19, 2021
Microbes Use Ancient Metabolism to Cycle Phosphorus
Microbial cycling of phosphorus through reduction-oxidation reactions is older and more widespre [more...]

Feb 22, 2021
Warming Soil Means Stronger Microbe Networks
Soil warming leads to more complex, larger, and more connected networks of microbes in those soi [more...]

Jan 27, 2021
Labeling the Thale Cress Metabolites
New data pipeline identifies metabolites following heavy isotope labeling.

Analysis [more...]

Aug 31, 2020
Novel Bacterial Clade Reveals Origin of Form I Rubisco
Objectives

  • All plant biomass is sourced from the carbon-fixing enzyme Rub [more...]

List all highlights (possible long download time)