Laboratory evolution of synthetic electron transport system variants reveals a larger metabolic respiratory system and its plasticity

Amitesh Anand*, Arjun Patel, Ke Chen, Connor A. Olson, Patrick V. Phaneuf, Cameron Lamoureux, Ying Hefner, Richard Szubin, Adam M. Feist, Bernhard O. Palsson*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

38 Downloads (Pure)

Abstract

The bacterial respiratory electron transport system (ETS) is branched to allow condition-specific modulation of energy metabolism. There is a detailed understanding of the structural and biochemical features of respiratory enzymes; however, a holistic examination of the system and its plasticity is lacking. Here we generate four strains of Escherichia coli harboring unbranched ETS that pump 1, 2, 3, or 4 proton(s) per electron and characterized them using a combination of synergistic methods (adaptive laboratory evolution, multi-omic analyses, and computation of proteome allocation). We report that: (a) all four ETS variants evolve to a similar optimized growth rate, and (b) the laboratory evolutions generate specific rewiring of major energy-generating pathways, coupled to the ETS, to optimize ATP production capability. We thus define an Aero-Type System (ATS), which is a generalization of the aerobic bioenergetics and is a metabolic systems biology description of respiration and its inherent plasticity.

Original languageEnglish
Article number3682
JournalNature Communications
Volume13
ISSN2041-1723
DOIs
Publication statusPublished - 2022

Fingerprint

Dive into the research topics of 'Laboratory evolution of synthetic electron transport system variants reveals a larger metabolic respiratory system and its plasticity'. Together they form a unique fingerprint.

Cite this