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Rate, accuracy and cost of ribosomes in bacterial cells
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology. (Ehrenberg)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology. (Ehrenberg)
2006 (English)In: Biochimie, ISSN 0300-9084, E-ISSN 1638-6183, Vol. 88, no 8, 951-961 p.Article in journal (Refereed) Published
Abstract [en]

Recent biochemical data on the rate of peptidyl-transfer and missense error levels associated with the E. coli ribosome in conjunction with direct measurements of diffusion constants for proteins in the E. coli cell have been used to discuss protein synthesis in the living E. coli cell in the perspective of a previously developed maximal fitness theory. With these improved experimental parameters, i.e. k(cat) similar to 50 s(-1) for protein elongation and k(cat)/K-M similar to 4 mu M-1 s(-1) for cognate ternary complex binding to the ribosomal A site, theory predicts the experimentally observed variations in protein elongation rate, ribosome and ternary complex concentrations with varying quality of the growth medium. The theoretically predicted average missense error level is close the error levels estimated in vitro for special isoacceptor combinations, i.e. error levels about I per million. The future prospect of extensive integration of biochemistry, cell physiology and population genetics is discussed in the light of the maximal fitness theory and other, similar, theoretical approaches.

Place, publisher, year, edition, pages
2006. Vol. 88, no 8, 951-961 p.
Keyword [en]
missense errors, accuracy of translation, rate of protein elongation, metabolic cost, growth regulation, ribosome, ternary complex
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-18896DOI: 10.1016/j.biochi.2006.04.019ISI: 000240794800004PubMedID: 16890342OAI: oai:DiVA.org:uu-18896DiVA: diva2:46668
Available from: 2006-11-23 Created: 2006-11-23 Last updated: 2017-12-08Bibliographically approved

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Lovmar, MartinEhrenberg, Måns

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