Misuse of the Michaelis–Menten rate law for protein interaction networks and its remedy

JK Kim, JJ Tyson - PLoS Computational Biology, 2020 - journals.plos.org
For over a century, the Michaelis–Menten (MM) rate law has been used to describe the rates
of enzyme-catalyzed reactions and gene expression. Despite the ubiquity of the MM rate …

The concept of coupling in the mammalian circadian clock network

V Pilorz, M Astiz, KO Heinen, O Rawashdeh… - Journal of molecular …, 2020 - Elsevier
The circadian clock network regulates daily rhythms in mammalian physiology and behavior
to optimally adapt the organism to the 24-h day/night cycle. A central pacemaker, the …

The choroid plexus is an important circadian clock component

J Myung, C Schmal, S Hong, Y Tsukizawa… - Nature …, 2018 - nature.com
Mammalian circadian clocks have a hierarchical organization, governed by the
suprachiasmatic nucleus (SCN) in the hypothalamus. The brain itself contains multiple loci …

Long-range temporal coordination of gene expression in synthetic microbial consortia

JK Kim, Y Chen, AJ Hirning, RN Alnahhas… - Nature chemical …, 2019 - nature.com
Synthetic microbial consortia have an advantage over isogenic synthetic microbes because
they can apportion biochemical and regulatory tasks among the strains. However, it is …

Protein sequestration versus Hill‐type repression in circadian clock models

JK Kim - IET systems biology, 2016 - Wiley Online Library
Circadian (∼ 24 h) clocks are self‐sustained endogenous oscillators with which organisms
keep track of daily and seasonal time. Circadian clocks frequently rely on interlocked …

Spatially coordinated collective phosphorylation filters spatiotemporal noises for precise circadian timekeeping

SJ Chae, DW Kim, S Lee, JK Kim - Iscience, 2023 - cell.com
The circadian (∼ 24h) clock is based on a negative-feedback loop centered around the
PERIOD protein (PER), translated in the cytoplasm and then enters the nucleus to repress its …

Combined multiple transcriptional repression mechanisms generate ultrasensitivity and oscillations

EM Jeong, YM Song, JK Kim - Interface Focus, 2022 - royalsocietypublishing.org
Transcriptional repression can occur via various mechanisms, such as blocking,
sequestration and displacement. For instance, the repressors can hold the activators to …

The validity of quasi-steady-state approximations in discrete stochastic simulations

JK Kim, K Josić, MR Bennett - Biophysical journal, 2014 - cell.com
In biochemical networks, reactions often occur on disparate timescales and can be
characterized as either fast or slow. The quasi-steady-state approximation (QSSA) utilizes …

Stability of wake-sleep cycles requires robust degradation of the PERIOD protein

M D'Alessandro, S Beesley, JK Kim, Z Jones, R Chen… - Current Biology, 2017 - cell.com
Robustness in biology is the stability of phenotype under diverse genetic and/or
environmental perturbations. The circadian clock has remarkable stability of period and …

Wake-sleep cycles are severely disrupted by diseases affecting cytoplasmic homeostasis

S Beesley, DW Kim, M D'Alessandro… - Proceedings of the …, 2020 - National Acad Sciences
The circadian clock is based on a transcriptional feedback loop with an essential time delay
before feedback inhibition. Previous work has shown that PERIOD (PER) proteins generate …