Model of the Ubiquitin-Proteasome System and Aging
Author Information
Author(s): Carole J Proctor, Maria Tsirigotis, Douglas A Gray
Primary Institution: Newcastle University
Hypothesis
The study aims to determine the primary event in the decline of proteolytic capacity with age and whether accumulating aggregates inhibit proteolysis.
Conclusion
The developed model of the ubiquitin-proteasome system shows that it can predict the effects of different experimental procedures and highlights the need for incorporating ubiquitin turnover in future models.
Supporting Evidence
- The model output shows good agreement with experimental data under various conditions.
- Important aspects to be included in subsequent models are details of ubiquitin turnover and models of autophagy.
- The model can predict the effects of proteasome inhibition and shutting down E1 activity.
Takeaway
This study created a computer model to understand how proteins are broken down in cells and how this process changes as we age.
Methodology
The model was developed using the Systems Biology Mark-up Language (SBML) and validated against experimental data from cultured cells.
Limitations
The model currently assumes a constant pool of ubiquitin and does not include details of ubiquitin turnover.
Digital Object Identifier (DOI)
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