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Strategy of transcription regulation in the budding yeast.
PLoS One. 2007 Feb 28; 2(2):e250.Plos

Abstract

Cells must adjust their gene expression in order to compete in a constantly changing environment. Two alternative strategies could in principle ensure optimal coordination of gene expression with physiological requirements. First, characters of the internal physiological state, such as growth rate, metabolite levels, or energy availability, could be feedback to tune gene expression. Second, internal needs could be inferred from the external environment, using evolutionary-tuned signaling pathways. Coordination of ribosomal biogenesis with the requirement for protein synthesis is of particular importance, since cells devote a large fraction of their biosynthetic capacity for ribosomal biogenesis. To define the relative contribution of internal vs. external sensing to the regulation of ribosomal biogenesis gene expression in yeast, we subjected S. cerevisiae cells to conditions which decoupled the actual vs. environmentally-expected growth rate. Gene expression followed the environmental signal according to the expected, but not the actual, growth rate. Simultaneous monitoring of gene expression and growth rate in continuous cultures further confirmed that ribosome biogenesis genes responded rapidly to changes in the environments but were oblivious to longer-term changes in growth rate. Our results suggest that the capacity to anticipate and prepare for environmentally-mediated changes in cell growth presented a major selection force during yeast evolution.

Authors+Show Affiliations

Department of Molecular Genetics and Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17327914

Citation

Levy, Sagi, et al. "Strategy of Transcription Regulation in the Budding Yeast." PloS One, vol. 2, no. 2, 2007, pp. e250.
Levy S, Ihmels J, Carmi M, et al. Strategy of transcription regulation in the budding yeast. PLoS One. 2007;2(2):e250.
Levy, S., Ihmels, J., Carmi, M., Weinberger, A., Friedlander, G., & Barkai, N. (2007). Strategy of transcription regulation in the budding yeast. PloS One, 2(2), e250.
Levy S, et al. Strategy of Transcription Regulation in the Budding Yeast. PLoS One. 2007 Feb 28;2(2):e250. PubMed PMID: 17327914.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Strategy of transcription regulation in the budding yeast. AU - Levy,Sagi, AU - Ihmels,Jan, AU - Carmi,Miri, AU - Weinberger,Adina, AU - Friedlander,Gilgi, AU - Barkai,Naama, Y1 - 2007/02/28/ PY - 2007/01/05/received PY - 2007/01/30/accepted PY - 2007/3/1/pubmed PY - 2007/3/1/medline PY - 2007/3/1/entrez SP - e250 EP - e250 JF - PloS one JO - PLoS One VL - 2 IS - 2 N2 - Cells must adjust their gene expression in order to compete in a constantly changing environment. Two alternative strategies could in principle ensure optimal coordination of gene expression with physiological requirements. First, characters of the internal physiological state, such as growth rate, metabolite levels, or energy availability, could be feedback to tune gene expression. Second, internal needs could be inferred from the external environment, using evolutionary-tuned signaling pathways. Coordination of ribosomal biogenesis with the requirement for protein synthesis is of particular importance, since cells devote a large fraction of their biosynthetic capacity for ribosomal biogenesis. To define the relative contribution of internal vs. external sensing to the regulation of ribosomal biogenesis gene expression in yeast, we subjected S. cerevisiae cells to conditions which decoupled the actual vs. environmentally-expected growth rate. Gene expression followed the environmental signal according to the expected, but not the actual, growth rate. Simultaneous monitoring of gene expression and growth rate in continuous cultures further confirmed that ribosome biogenesis genes responded rapidly to changes in the environments but were oblivious to longer-term changes in growth rate. Our results suggest that the capacity to anticipate and prepare for environmentally-mediated changes in cell growth presented a major selection force during yeast evolution. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/17327914/Strategy_of_transcription_regulation_in_the_budding_yeast_ DB - PRIME DP - Unbound Medicine ER -