Evidence map›Paper›PMID 20824102›Full record

ArticlemBio2010

Economical evolution: microbes reduce the synthetic cost of extracellular proteins.

Daniel R Smith, Matthew R Chapman

Open access · goldAbstract read
In one paragraph

Article in mBio, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed
3.8field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

69 citing papers in PubMed, 111 citations in OpenAlex.

  1. AnResearch square · 2026
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  2. Review
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  4. Article
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  6. Cell Geometry Limits Bacterial Metabolic Efficiency.bioRxiv : the preprint server for biology · 2025
    Article
  7. Bioenergetics and the Evolution of Cellular Traits.Annual review of biophysics · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. The impact of PrsA over-expression on theFrontiers in microbiology · 2022
    Article
  18. Article
  19. Article
  20. The ecology of heterogeneity: soil bacterial communities and C dynamics.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020
    Article

9 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 1 country.

Daniel R SmithDepartment of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA.
Matthew R Chapman
Michigan State University · USUniversity of Michigan–Ann Arbor · US

Funding

Assembly of Curli Fibers by Escherichia coliR01AI073847 · NIAID · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI CHAPMAN, MATTHEW RICHARD · 2007 to 2011
$1.8M
Curli Fiber Assembly and FunctionR56AI073847 · NIAID · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI CHAPMAN, MATTHEW RICHARD · 2013 to 2013
$352k
NIAID NIH HHS R01 AI073847NIAID NIH HHS R56 AI073847
6 · The paper itself

Abstract

Protein evolution is not simply a race toward improved function. Because organisms compete for limited resources, fitness is also affected by the relative economy of an organism's proteome. Indeed, many abundant proteins contain relatively high percentages of amino acids that are metabolically less taxing for the cell to make, thus reducing cellular cost. However, not all abundant proteins are economical, and many economical proteins are not particularly abundant. Here we examined protein composition and found that the relative synthetic cost of amino acids constrains the composition of microbial extracellular proteins. In Escherichia coli, extracellular proteins contain, on average, fewer energetically expensive amino acids independent of their abundance, length, function, or structure. Economic pressures have strategically shaped the amino acid composition of multicomponent surface appendages, such as flagella, curli, and type I pili, and extracellular enzymes, including type III effector proteins and secreted serine proteases. Furthermore, in silico analysis of Pseudomonas syringae, Mycobacterium tuberculosis, Saccharomyces cerevisiae, and over 25 other microbes spanning a wide range of GC content revealed a broad bias toward more economical amino acids in extracellular proteins. The synthesis of any protein, especially those rich in expensive aromatic amino acids, represents a significant investment. Because extracellular proteins are lost to the environment and not recycled like other cellular proteins, they present a greater burden on the cell, as their amino acids cannot be reutilized during translation. We hypothesize that evolution has optimized extracellular proteins to reduce their synthetic burden on the cell.

Indexed as

Biological EvolutionEnergy MetabolismAdenosine TriphosphateBacteriaBacterial ProteinsEscherichia coliEscherichia coli ProteinsExtracellular SpaceProtein TransportAdenosine TriphosphateBacterial ProteinsEscherichia coli Proteins

Identifiers

PMID20824102
PMCPMC2932507
OpenAlexW2154852184

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.