Journal
PLOS BIOLOGY
Volume 19, Issue 10, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pbio.3001402
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Funding
- Volkswagenstiftung (in the Life? program)
- Deutsche Forschungsgemeinschaft [CRC 1310, EXC 2048/1, 390686111]
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The study developed a model using machine and deep learning methods to predict KM values for natural enzyme-substrate combinations, providing genome-scale KM predictions that can help relate metabolite concentrations to cellular physiology.
The Michaelis constant K-M describes the affinity of an enzyme for a specific substrate and is a central parameter in studies of enzyme kinetics and cellular physiology. As measurements of K-M are often difficult and time-consuming, experimental estimates exist for only a minority of enzyme-substrate combinations even in model organisms. Here, we build and train an organism-independent model that successfully predicts K-M values for natural enzyme-substrate combinations using machine and deep learning methods. Predictions are based on a task-specific molecular fingerprint of the substrate, generated using a graph neural network, and on a deep numerical representation of the enzyme's amino acid sequence. We provide genome-scale K-M predictions for 47 model organisms, which can be used to approximately relate metabolite concentrations to cellular physiology and to aid in the parameterization of kinetic models of cellular metabolism.
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