Understanding Protein Dynamics with L1-Regularized Reversible Hidden Markov Models

Robert McGibbon, Bharath Ramsundar, Mohammad Sultan, Gert Kiss, Vijay Pande
; Proceedings of the 31st International Conference on Machine Learning, PMLR 32(2):1197-1205, 2014.

Abstract

We present a machine learning framework for modeling protein dynamics. Our approach uses L1-regularized, reversible hidden Markov models to understand large protein datasets generated via molecular dynamics simulations. Our model is motivated by three design principles: (1) the requirement of massive scalability; (2) the need to adhere to relevant physical law; and (3) the necessity of providing accessible interpretations, critical for rational protein engineering and drug design. We present an EM algorithm for learning and introduce a model selection criteria based on the physical notion of relaxation timescales. We contrast our model with standard methods in biophysics and demonstrate improved robustness. We implement our algorithm on GPUs and apply the method to two large protein simulation datasets generated respectively on the NCSA Bluewaters supercomputer and the Folding@Home distributed computing network. Our analysis identifies the conformational dynamics of the ubiquitin protein responsible for signaling, and elucidates the stepwise activation mechanism of the c-Src kinase protein.

Cite this Paper


BibTeX
@InProceedings{pmlr-v32-mcgibbon14, title = {Understanding Protein Dynamics with L1-Regularized Reversible Hidden Markov Models}, author = {Robert McGibbon and Bharath Ramsundar and Mohammad Sultan and Gert Kiss and Vijay Pande}, booktitle = {Proceedings of the 31st International Conference on Machine Learning}, pages = {1197--1205}, year = {2014}, editor = {Eric P. Xing and Tony Jebara}, volume = {32}, number = {2}, series = {Proceedings of Machine Learning Research}, address = {Bejing, China}, month = {22--24 Jun}, publisher = {PMLR}, pdf = {http://proceedings.mlr.press/v32/mcgibbon14.pdf}, url = {http://proceedings.mlr.press/v32/mcgibbon14.html}, abstract = {We present a machine learning framework for modeling protein dynamics. Our approach uses L1-regularized, reversible hidden Markov models to understand large protein datasets generated via molecular dynamics simulations. Our model is motivated by three design principles: (1) the requirement of massive scalability; (2) the need to adhere to relevant physical law; and (3) the necessity of providing accessible interpretations, critical for rational protein engineering and drug design. We present an EM algorithm for learning and introduce a model selection criteria based on the physical notion of relaxation timescales. We contrast our model with standard methods in biophysics and demonstrate improved robustness. We implement our algorithm on GPUs and apply the method to two large protein simulation datasets generated respectively on the NCSA Bluewaters supercomputer and the Folding@Home distributed computing network. Our analysis identifies the conformational dynamics of the ubiquitin protein responsible for signaling, and elucidates the stepwise activation mechanism of the c-Src kinase protein.} }
Endnote
%0 Conference Paper %T Understanding Protein Dynamics with L1-Regularized Reversible Hidden Markov Models %A Robert McGibbon %A Bharath Ramsundar %A Mohammad Sultan %A Gert Kiss %A Vijay Pande %B Proceedings of the 31st International Conference on Machine Learning %C Proceedings of Machine Learning Research %D 2014 %E Eric P. Xing %E Tony Jebara %F pmlr-v32-mcgibbon14 %I PMLR %J Proceedings of Machine Learning Research %P 1197--1205 %U http://proceedings.mlr.press %V 32 %N 2 %W PMLR %X We present a machine learning framework for modeling protein dynamics. Our approach uses L1-regularized, reversible hidden Markov models to understand large protein datasets generated via molecular dynamics simulations. Our model is motivated by three design principles: (1) the requirement of massive scalability; (2) the need to adhere to relevant physical law; and (3) the necessity of providing accessible interpretations, critical for rational protein engineering and drug design. We present an EM algorithm for learning and introduce a model selection criteria based on the physical notion of relaxation timescales. We contrast our model with standard methods in biophysics and demonstrate improved robustness. We implement our algorithm on GPUs and apply the method to two large protein simulation datasets generated respectively on the NCSA Bluewaters supercomputer and the Folding@Home distributed computing network. Our analysis identifies the conformational dynamics of the ubiquitin protein responsible for signaling, and elucidates the stepwise activation mechanism of the c-Src kinase protein.
RIS
TY - CPAPER TI - Understanding Protein Dynamics with L1-Regularized Reversible Hidden Markov Models AU - Robert McGibbon AU - Bharath Ramsundar AU - Mohammad Sultan AU - Gert Kiss AU - Vijay Pande BT - Proceedings of the 31st International Conference on Machine Learning PY - 2014/01/27 DA - 2014/01/27 ED - Eric P. Xing ED - Tony Jebara ID - pmlr-v32-mcgibbon14 PB - PMLR SP - 1197 DP - PMLR EP - 1205 L1 - http://proceedings.mlr.press/v32/mcgibbon14.pdf UR - http://proceedings.mlr.press/v32/mcgibbon14.html AB - We present a machine learning framework for modeling protein dynamics. Our approach uses L1-regularized, reversible hidden Markov models to understand large protein datasets generated via molecular dynamics simulations. Our model is motivated by three design principles: (1) the requirement of massive scalability; (2) the need to adhere to relevant physical law; and (3) the necessity of providing accessible interpretations, critical for rational protein engineering and drug design. We present an EM algorithm for learning and introduce a model selection criteria based on the physical notion of relaxation timescales. We contrast our model with standard methods in biophysics and demonstrate improved robustness. We implement our algorithm on GPUs and apply the method to two large protein simulation datasets generated respectively on the NCSA Bluewaters supercomputer and the Folding@Home distributed computing network. Our analysis identifies the conformational dynamics of the ubiquitin protein responsible for signaling, and elucidates the stepwise activation mechanism of the c-Src kinase protein. ER -
APA
McGibbon, R., Ramsundar, B., Sultan, M., Kiss, G. & Pande, V.. (2014). Understanding Protein Dynamics with L1-Regularized Reversible Hidden Markov Models. Proceedings of the 31st International Conference on Machine Learning, in PMLR 32(2):1197-1205

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