Genome-wide inference reveals that feedback regulations constrain promoter-dependent transcriptional burst kinetics

S Luo, Z Wang, Z Zhang, T Zhou… - Nucleic Acids …, 2023 - academic.oup.com
Gene expression in mammalian cells is highly variable and episodic, resulting in a series of
discontinuous bursts of mRNAs. A challenge is to understand how static promoter …

Modeling protein concentrations in cycling cells using stochastic hybrid systems

Z Vahdat, Z Xu, A Singh - IFAC-PapersOnLine, 2021 - Elsevier
We analyze a class of time-triggered stochastic hybrid systems where the state-space
evolves as per a linear time-invariant dynamical system. This continuous-time evolution is …

Enhancement of gene expression noise from transcription factor binding to genomic decoy sites

S Dey, M Soltani, A Singh - Scientific reports, 2020 - nature.com
The genome contains several high-affinity non-functional binding sites for transcription
factors (TFs) creating a hidden and unexplored layer of gene regulation. We investigate the …

Efficient analysis of stochastic gene dynamics in the non-adiabatic regime using piecewise deterministic Markov processes

YT Lin, NE Buchler - Journal of The Royal Society …, 2018 - royalsocietypublishing.org
Single-cell experiments show that gene expression is stochastic and bursty, a feature that
can emerge from slow switching between promoter states with different activities. In addition …

Amplification of noisy gene expression by protein burden: An analytical approach

I Zabaikina, Z Zhang, C Nieto, P Bokes… - 2023 American …, 2023 - ieeexplore.ieee.org
The overexpression of many proteins can often have a detrimental impact on cellular growth.
This expression-growth coupling leads to positive feedback-any increase of intracellular …

Stochastic gene expression in proliferating cells: Differing noise intensity in single-cell and population perspectives

Z Zhang, I Zabaikina, C Nieto, Z Vahdat, P Bokes… - …, 2024 - pmc.ncbi.nlm.nih.gov
Random fluctuations (noise) in gene expression can be studied from two complementary
perspectives: following expression in a single cell over time or comparing expression …

Quantifying noise modulation from coupling of stochastic expression to cellular growth: An analytical approach

I Zabaikina, Z Zhang, C Nieto, P Bokes, A Singh - bioRxiv, 2022 - biorxiv.org
The overexpression of many proteins can often have a detrimental impact on cellular growth.
This expression-growth coupling leads to positive feedback-any increase of intracellular …

Information processing in unregulated and autoregulated gene expression

Z Vahdat, K Nienałtowski, Z Farooq… - 2020 European …, 2020 - ieeexplore.ieee.org
How living cells can reliably process biochemical cues in the presence of molecular noise is
not fully understood. Here we investigate the fidelity of information transfer in the expression …

High cooperativity in negative feedback can amplify noisy gene expression

P Bokes, YT Lin, A Singh - Bulletin of Mathematical Biology, 2018 - Springer
Burst-like synthesis of protein is a significant source of cell-to-cell variability in protein levels.
Negative feedback is a common example of a regulatory mechanism by which such …

Comparative analysis of noise-attenuation mechanisms in gene expression: From single cells to cell populations

Z Zhang, C Nieto, A Singh - bioRxiv, 2023 - biorxiv.org
Negative feedback regulation is a well-known motif for suppressing deleterious fluctuations
in gene product levels. We systematically compare two scenarios where negative feedback …