Principles of proteome allocation are revealed using proteomic data and genome-scale models
Abstract
Integrating omics data to refine or make context-specific models is an active field of constraint-based modeling. Proteomics now cover over 95% of the Escherichia coli proteome by mass. Genome-scale models of Metabolism and macromolecular Expression (ME) compute proteome allocation linked to metabolism and fitness. Using proteomics data, we formulated allocation constraints for key proteome sectors in the ME model. The resulting calibrated model effectively computed the “generalist” (wild-type) E. coli proteome and phenotype across diverse growth environments. Across 15 growth conditions, prediction errors for growth rate and metabolic fluxes were 69% and 14% lower, respectively. The sector-constrained ME model thus represents a generalist ME model reflecting both growth rate maximization and “hedging” against uncertain environments and stresses, as indicated by significant enrichment of these sectors for the general stress response sigma factor σS. Finally, the sector constraints represent a general formalism for integrating omics data from any experimental condition into constraint-based ME models. The constraints can be fine-grained (individual proteins) or coarse-grained (functionally-related protein groups) as demonstrated here. Furthermore, this flexible formalism provides an accessible approach for narrowing the gap between the complexity captured by omics data and governing principles of proteome allocation described by systems-level models.
- Authors:
-
- Univ. of California, San Diego, La Jolla, CA (United States)
- Stanford Univ., Stanford, CA (United States)
- Univ. of California, San Diego, La Jolla, CA (United States); The Technical Univ. of Denmark, Horsholm (Denmark)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1373286
- Grant/Contract Number:
- SC0008701
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; 60 APPLIED LIFE SCIENCES; biochemical networks; computer modelling
Citation Formats
Yang, Laurence, Yurkovich, James T., Lloyd, Colton J., Ebrahim, Ali, Saunders, Michael A., and Palsson, Bernhard O. Principles of proteome allocation are revealed using proteomic data and genome-scale models. United States: N. p., 2016.
Web. doi:10.1038/srep36734.
Yang, Laurence, Yurkovich, James T., Lloyd, Colton J., Ebrahim, Ali, Saunders, Michael A., & Palsson, Bernhard O. Principles of proteome allocation are revealed using proteomic data and genome-scale models. United States. https://doi.org/10.1038/srep36734
Yang, Laurence, Yurkovich, James T., Lloyd, Colton J., Ebrahim, Ali, Saunders, Michael A., and Palsson, Bernhard O. Fri .
"Principles of proteome allocation are revealed using proteomic data and genome-scale models". United States. https://doi.org/10.1038/srep36734. https://www.osti.gov/servlets/purl/1373286.
@article{osti_1373286,
title = {Principles of proteome allocation are revealed using proteomic data and genome-scale models},
author = {Yang, Laurence and Yurkovich, James T. and Lloyd, Colton J. and Ebrahim, Ali and Saunders, Michael A. and Palsson, Bernhard O.},
abstractNote = {Integrating omics data to refine or make context-specific models is an active field of constraint-based modeling. Proteomics now cover over 95% of the Escherichia coli proteome by mass. Genome-scale models of Metabolism and macromolecular Expression (ME) compute proteome allocation linked to metabolism and fitness. Using proteomics data, we formulated allocation constraints for key proteome sectors in the ME model. The resulting calibrated model effectively computed the “generalist” (wild-type) E. coli proteome and phenotype across diverse growth environments. Across 15 growth conditions, prediction errors for growth rate and metabolic fluxes were 69% and 14% lower, respectively. The sector-constrained ME model thus represents a generalist ME model reflecting both growth rate maximization and “hedging” against uncertain environments and stresses, as indicated by significant enrichment of these sectors for the general stress response sigma factor σS. Finally, the sector constraints represent a general formalism for integrating omics data from any experimental condition into constraint-based ME models. The constraints can be fine-grained (individual proteins) or coarse-grained (functionally-related protein groups) as demonstrated here. Furthermore, this flexible formalism provides an accessible approach for narrowing the gap between the complexity captured by omics data and governing principles of proteome allocation described by systems-level models.},
doi = {10.1038/srep36734},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {Fri Nov 18 00:00:00 EST 2016},
month = {Fri Nov 18 00:00:00 EST 2016}
}
Web of Science
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