Stochastic gene expression as a many-body problem

M Sasai, PG Wolynes - Proceedings of the National …, 2003 - National Acad Sciences
Gene expression has a stochastic component because of the single-molecule nature of the
gene and the small number of copies of individual DNA-binding proteins in the cell. We show …

Generation of dynamic three-dimensional genome structure through phase separation of chromatin

S Fujishiro, M Sasai - … of the National Academy of Sciences, 2022 - National Acad Sciences
Three-dimensional genome structure and dynamics play critical roles in regulating DNA
functions. Flexible chromatin structure and movements suggested that the genome is …

Organization of fast and slow chromatin revealed by single-nucleosome dynamics

…, T Nozaki, K Maeshima, M Sasai - Proceedings of the …, 2019 - National Acad Sciences
Understanding chromatin organization and dynamics is important, since they crucially affect
DNA functions. In this study, we investigate chromatin dynamics by statistically analyzing …

Condensed but liquid-like domain organization of active chromatin regions in living human cells

…, M Nakagawa, Y Suzuki, Y Okada, M Sasai… - Science …, 2023 - science.org
In eukaryotes, higher-order chromatin organization is spatiotemporally regulated as domains,
for various cellular functions. However, their physical nature in living cells remains unclear …

Unidirectional Brownian motion observed in an in silico single molecule experiment of an actomyosin motor

M Takano, TP Terada, M Sasai - Proceedings of the …, 2010 - National Acad Sciences
The actomyosin molecular motor, the motor composed of myosin II and actin filament, is
responsible for muscle contraction, converting chemical energy into mechanical work. Although …

Growth and collapse of structural patterns in the hydrogen bond network in liquid water

E Shiratani, M Sasai - The Journal of chemical physics, 1996 - pubs.aip.org
Intermittent and chaotic motions of the hydrogen bond network are studied with the molecular
dynamics (MD) simulation. By analyzing the fluctuation in the radial distribution function, it …

Molecular scale precursor of the liquid–liquid phase transition of water

E Shiratani, M Sasai - The Journal of chemical physics, 1998 - pubs.aip.org
Spatiotemporal fluctuations of the local structure in liquid water are studied with the
molecular-dynamics simulation. At temperatures around and above the melting point, each molecule …

[HTML][HTML] Liquid-like behavior of chromatin

K Maeshima, S Ide, K Hibino, M Sasai - Current opinion in genetics & …, 2016 - Elsevier
Eukaryotic chromatin is a negatively charged long polymer composed of genomic DNA,
histones, and various proteins. The charged property causes the chromatin structure to be …

Single nucleosome imaging reveals loose genome chromatin networks via active RNA polymerase II

…, H Kimura, M Shribak, MT Kanemaki, M Sasai… - Journal of Cell …, 2019 - rupress.org
Although chromatin organization and dynamics play a critical role in gene transcription, how
they interplay remains unclear. To approach this issue, we investigated genome-wide …

[PDF][PDF] Self-consistent proteomic field theory of stochastic gene switches

AM Walczak, M Sasai, PG Wolynes - Biophysical journal, 2005 - cell.com
We present a self-consistent field approximation approach to the problem of the genetic
switch composed of two mutually repressing/activating genes. The protein and DNA state …