Impact of Limited Solvent Capacity on Metabolism
Author Information
Author(s): Vazquez Alexei, de Menezes Marcio A., Barabási Albert-László, Oltvai Zoltan N.
Primary Institution: The Simons Center for Systems Biology, Institute for Advanced Study, Princeton, New Jersey, United States of America
Hypothesis
The limited solvent capacity of a cell constrains metabolic processes such as glycolysis.
Conclusion
The study shows that the limited solvent capacity is a significant constraint on the metabolic rate and enzyme activities in S. cerevisiae.
Supporting Evidence
- The predicted maximum glycolytic rate aligns closely with in vivo measurements.
- Optimal enzyme activities and metabolite concentrations were found to match experimental values.
- The study extends previous findings on E. coli to S. cerevisiae, confirming the relevance of solvent capacity constraints.
Takeaway
Cells are crowded with molecules, which limits how many enzymes can fit inside, affecting how fast they can work. This study looks at how this crowding impacts yeast's sugar processing.
Methodology
The study uses a computational model to analyze the glycolysis pathway in S. cerevisiae, focusing on enzyme activities and metabolite concentrations under limited solvent capacity.
Limitations
The model may not account for all biological variations and constraints present in vivo.
Digital Object Identifier (DOI)
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