Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

Cells are intrinsically noisy biochemical reactors: low reactant numbers can lead to significant statistical fluctuations in molecule numbers and reaction rates. Here we use an analytic model to investigate the emergent noise properties of genetic systems. We find for a single gene that noise is essentially determined at the translational level, and that the mean and variance of protein concentration can be independently controlled. The noise strength immediately following single gene induction is almost twice the final steady-state value. We find that fluctuations in the concentrations of a regulatory protein can propagate through a genetic cascade; translational noise control could explain the inefficient translation rates observed for genes encoding such regulatory proteins. For an autoregulatory protein, we demonstrate that negative feedback efficiently decreases system noise. The model can be used to predict the noise characteristics of networks of arbitrary connectivity. The general procedure is further illustrated for an autocatalytic protein and a bistable genetic switch. The analysis of intrinsic noise reveals biological roles of gene network structures and can lead to a deeper understanding of their evolutionary origin.

Bibliography

Thattai, M., & van Oudenaarden, A. (2001). Intrinsic noise in gene regulatory networks. Proceedings of the National Academy of Sciences, 98(15), 8614–8619.

Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 10:34 a.m.)
Deposited 3 years, 4 months ago (April 12, 2022, 11:53 p.m.)
Indexed 3 days, 3 hours ago (Sept. 3, 2025, 6:30 a.m.)
Issued 24 years, 2 months ago (July 3, 2001)
Published 24 years, 2 months ago (July 3, 2001)
Published Online 24 years, 2 months ago (July 3, 2001)
Published Print 24 years, 1 month ago (July 17, 2001)
Funders 0

None

@article{Thattai_2001, title={Intrinsic noise in gene regulatory networks}, volume={98}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.151588598}, DOI={10.1073/pnas.151588598}, number={15}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Thattai, Mukund and van Oudenaarden, Alexander}, year={2001}, month=jul, pages={8614–8619} }