Cited by 440Evolution and Genetic DynamicsBacterial Genetics and BiotechnologyMicrobial Metabolic Engineering and Bioproduction

Parallel changes in gene expression after 20,000 generations of evolution in Escherichia coli

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Cooper, Tim F., Rozen, Daniel E., Lenski, Richard E.·2003·Proceedings of the National Academy of Sciences

Abstract

Twelve populations of Escherichia coli , derived from a common ancestor, evolved in a glucose-limited medium for 20,000 generations. Here we use DNA expression arrays to examine whether gene-expression profiles in two populations evolved in parallel, which would indicate adaptation, and to gain insight into the mechanisms underlying their adaptation. We compared the expression profile of the ancestor to that of clones sampled from both populations after 20,000 generations. The expression of 59 genes had changed significantly in both populations. Remarkably, all 59 were changed in the same direction relative to the ancestor. Many of these genes were members of the cAMP-cAMP receptor protein (CRP) and guanosine tetraphosphate (ppGpp) regulons. Sequencing of several genes controlling the effectors of these regulons found a nonsynonymous mutation in spoT in one population. Moving this mutation into the ancestral background showed that it increased fitness and produced many of the expression changes manifest after 20,000 generations. The same mutation had no effect on fitness when introduced into the other evolved population, indicating that a mutation of similar effect was present already. Our study demonstrates the utility of expression arrays for addressing evolutionary issues including the quantitative measurement of parallel evolution in independent lineages and the identification of beneficial mutations.

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  • Other biotechnological processes, such as recombinant protein production and metabolite co-production in microbial cells, are coupled to microbial growth.

    “Other biotechnological processes, such as recombinant protein production and metabolite co-production in microbial cells, are coupled to microbial growth [56].”

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  1. [29]Tusher, V. G., Tibshirani, R. & Chu, G. (2001) Proc. Natl. Acad. Sci. USA 98, 5116-5121.
  2. [33]Lenski, R. E., Winkworth, C. L. & Riley, M. A. (2003) J. Mol. Evol. , in press.
  3. [34]McNabb, R. M. (1996) in Escherichia coli and Salmonella: Cellular and Molecular Biology , ed. Neidhardt, F. C. (Am. Soc. Microbiol., Washington, DC), pp. 123-145.

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Authors
Cooper, T. F., Rozen, D. E., & Lenski, R. E.
Affiliations
Michigan State University (US)
Venue
Proceedings of the National Academy of Sciences
Published
2003-01-21
Volume
100
Issue
3
Pages
1072-1077
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2116791869
Cited by
440
References
43
Citations by year
2026: 8 · 2025: 8 · 2024: 7 · 2023: 15 · 2022: 10 · 2021: 14 · 2020: 10 · 2019: 23 · 2018: 14 · 2017: 15 · 2016: 11 · 2015: 27 · 2014: 19 · 2013: 29 · 2012: 25
FWCI
13.92
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
Keywords
parallel evolution, gene expression evolution, Escherichia coli, beneficial mutations, transcriptional regulation
MeSH terms
Carrier Proteins, Cyclic AMP Receptor Protein, Escherichia coli, Biological Evolution, Guanosine, Mutation, Pyrophosphatases, Time Factors, Evolution, Molecular, Oligonucleotide Array Sequence Analysis

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