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research article

Rational strain design with minimal phenotype perturbation

Narayanan, Bharath  
•
Weilandt, Daniel R.  
•
Masid, Maria
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January 24, 2024
Nature Communications

Devising genetic interventions for desired cellular phenotypes remains challenging regarding time and resources. Kinetic models can accelerate this task by simulating metabolic responses to genetic perturbations. However, exhaustive design evaluations with kinetic models are computationally impractical, especially when targeting multiple enzymes. Here, we introduce a framework for efficiently scouting the design space while respecting cellular physiological requirements. The framework employs mixed-integer linear programming and nonlinear simulations with large-scale nonlinear kinetic models to devise genetic interventions while accounting for the network effects of these perturbations. Importantly, it ensures the engineered strain's robustness by maintaining its phenotype close to that of the reference strain. The framework, applied to improve the anthranilate production in E. coli, devises designs for experimental implementation, including eight previously experimentally validated targets. We expect this framework to play a crucial role in future design-build-test-learn cycles, significantly expediting the strain design compared to exhaustive design enumeration.|No consensus exists on the computationally tractable use of dynamic models for strain design. To tackle this, the authors report a framework, nonlinear-dynamic-model-assisted rational metabolic engineering design, for efficiently designing robust, artificially engineered cellular organisms.

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Type
research article
DOI
10.1038/s41467-024-44831-0
Web of Science ID

WOS:001150728500026

Author(s)
Narayanan, Bharath  
Weilandt, Daniel R.  
Masid, Maria
Miskovic, Ljubisa  
Hatzimanikatis, Vassily  
Date Issued

2024-01-24

Publisher

Nature Portfolio

Published in
Nature Communications
Volume

15

Issue

1

Start page

723

Subjects

Metabolic-Control Analysis

•

Adenylate Energy-Charge

•

Kinetic-Models

•

Escherichia-Coli

•

Parameter-Estimation

•

Uncertainty

•

Identification

•

Networks

•

Fluxes

•

Arog

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCSB  
FunderGrant Number

European Union

814408

Swiss National Science Foundation Synergia

CRSII5_198543

Swedish Research Council Vetenskapsradet grant

2016-06160

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Available on Infoscience
February 23, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/205399
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