Jul 27 – 31, 2020
Virtual event
Europe/Berlin timezone

A Hamiltonian Monte Carlo Bayesian Inference Approach Using Deep Learning for Modeling Metabolism

Jul 29, 2020, 7:30 PM
1h
Poster Posters 2

Speaker

Christina Schenk (Basque Center for Applied Mathematics)

Description

Metabolism plays a key role in a multitude of different biological processes ranging from food production and biofuel production to human health. Predicting the metabolism of a living organism, however, can be a challenging task. Genome-scale models (GEMs) can provide this predictive power by accounting for all metabolic reactions in an organism's genome. So far, GEMs have been used to model metabolism through optimization approaches, but this approach shows limitations. We propose a new approach based on a combination of Markov Chain Monte Carlo and Bayesian inference that provides all metabolic states compatible with the available experimental data. We discuss efficient sampling techniques which can leverage high performance computing to efficiently handle the associated computational burden. These techniques are based on Hamiltonian Monte Carlo methods that leverage artificial neural networks for efficient gradient calculation. The corresponding numerical results for case studies related to predictive modeling of metabolism are presented and analyzed. This technique represents a first step towards modeling microbial communities in the future.

Primary author

Christina Schenk (Basque Center for Applied Mathematics)

Co-authors

Elena Akhmatskaya (Basque Center for Applied Mathematics) Hector Garcia Martin (Lawrence Berkeley National Laboratory) Tyler Backman (Lawrence Berkeley National Laboratory) Tijana Radivojevic (Lawrence Berkeley National Laboratory)

Presentation materials