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X-WR-CALDESC:Events for Biomedical Mathematics Group
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TZID:Asia/Seoul
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TZOFFSETFROM:+0900
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DTSTART:20210101T000000
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DTSTART;TZID=Asia/Seoul:20220204T130000
DTEND;TZID=Asia/Seoul:20220204T140000
DTSTAMP:20260427T053424
CREATED:20220126T170000Z
LAST-MODIFIED:20220125T115800Z
UID:5397-1643979600-1643983200@www.ibs.re.kr
SUMMARY:Mechanisms for the generation of robust circadian oscillations through ultrasensitivity and differential binding affinity
DESCRIPTION:We will discuss about “Mechanisms for the generation of robust circadian oscillations through ultrasensitivity and differential binding affinity”\, Behera\, Junco\, and Vaikuntanathan\, The Journal of Physical Chemistry B\, 2021 \nBiochemical circadian rhythm oscillations play an important role in many signaling mechanisms. In this work\, we explore some of the biophysical mechanisms responsible for sustaining robust oscillations by constructing a minimal but analytically tractable model of the circadian oscillations in the KaiABC protein system found in the cyanobacteria S. elongatus. In particular\, our minimal model explicitly accounts for two experimentally characterized biophysical features of the KaiABC protein system\, namely\, a differential binding affinity and an ultrasensitive response. Our analytical work shows how these mechanisms might be crucial for promoting robust oscillations even in suboptimal nutrient conditions. Our analytical and numerical work also identifies mechanisms by which biological clocks can stably maintain a constant time period under a variety of nutrient conditions. Finally\, our work also explores the thermodynamic costs associated with the generation of robust sustained oscillations and shows that the net rate of entropy production alone might not be a good figure of merit to asses the quality of oscillations. \n 
URL:https://www.ibs.re.kr/bimag/event/2022-02-04/
LOCATION:B378 Seminar room\, IBS\, 55 Expo-ro Yuseong-gu\, Daejeon\, 34126\, Korea\, Republic of
CATEGORIES:Journal Club
ORGANIZER;CN="Jae Kyoung Kim":MAILTO:jaekkim@kaist.ac.kr
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