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Stability puzzles in phage lambda
2002 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, ISSN 1063-651X, E-ISSN 1095-3787, Vol. 65, no 5Article in journal (Refereed) Published
Abstract [en]

In the absence of RecA-mediated cleavage of the repressor, the X prophage is exceptionally stable. We. develop a stochastic model that predicts the stability of such epigenetic states from affinities of the molecular components. We find that the stability, in particular, depends on the maximum possible cI protein production. and on the number of translated cro proteins per transcribed mRNA. We apply the model to the behavior of recently published mutants of O-R and find, in particular, that a mutant that overexpress cro behaves in a different way than what was predicted, thus suggesting that the current view of the O-R switch is incomplete. The approach described here should be generally applicable to the stability of expressed states.

Place, publisher, year, edition, pages
2002. Vol. 65, no 5
Keyword [en]
escherichia-coli, bacteriophage-lambda, gene-regulation, transcription initiation, translation initiation, operator binding, cro repressor, prm promoter, dna, switch
Identifiers
URN: urn:nbn:se:kth:diva-21672DOI: 10.1103/PhysRevE.65.051914ISI: 000176552300091OAI: oai:DiVA.org:kth-21672DiVA: diva2:340370
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Aurell, Erik
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