2019/03/17 by Kabir Husain, Husain, Kabir, Weerapat Pittayakanchit +7
Biochemistry, Genetics and Molecular Biology · #Biological Physics (physics.bio-ph) #FOS: Biological sciences #FOS: Physical sciences #Fungal and yeast genetics research #Gene Regulatory Network Analysis #Microbial Metabolic Engineering and Bioproduction #Molecular Networks (q-bio.MN)
paper · pdf · doi:10.48550/arxiv.1903.07103
openalex publication_date 2019/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Living organisms need to be sensitive to a changing environment while also ignoring uninformative environmental fluctuations. Here, we show that the circadian clock in Synechococcus elongatus can naturally tune its environmental sensitivity, through a clock-metabolism coupling quantified in recent experiments. The metabolic coupling can detect mismatch between clock predictions and the day-night light cycle, and temporarily raise the clock's sensitivity to light changes and thus entrain faster. We also analyze analogous behavior in recent experiments on switching between slow and fast osmotic stress response pathways in yeast. In both cases, cells can raise their sensitivity to new external information in epochs of frequent challenging stress, much like a Kalman filter with adaptive gain in signal processing. Our work suggests a new class of experiments that probe the history-dependence of environmental sensitivity in biophysical sensing mechanisms.