Dynamical patterns of p53 states driven by PML

TL;DR

This paper models the PML-MDM2-p53 regulatory network to understand how PML influences p53 dynamics, revealing state transitions that correspond to different cellular conditions and biological functions.

Contribution

It integrates existing models to analyze PML's role in p53 regulation, uncovering phase transition-like behavior in cellular state dynamics.

Findings

PML induces transitions among p53 states.

Different stress conditions lead to distinct p53 dynamics.

p53 states correlate with cellular states.

Abstract

Recent studies suggest that PML (Promyelocytic Leukemia) suppresses p53 protein degradation by inhibiting MDM2 protein in the nucleus [1], and regulates a number of biological functions [2]. We modeled a PML-MDM2-p53 regulatory network by integrating p53-MDM2 autoregulatory model [3] and related PML pathways. We found that p53 dynamics switched at various dynamical states induced by PML which corresponds to different cellular states. Our results show clear transitions among the stabilized, damped and sustain states under different stress conditions induced by PML in the system. These states in p53 dynamics is the signature of existence of various cellular states and the phase transition like behaviour of these states involve various biological significance.