The Mitotic Exit Network integrates temporal and spatial signals by distributing regulation across multiple components
Name
elife-41139-v2.pdf
Description
Published version
Size
5.42 MB
Format
Adobe PDF
Checksum (MD5)
be8338507e8b45a93e9e5998ec6d2442
Author(s)
Zhou, Xiaoxue
Amon, Angelika B
Campbell, Ian Winsten.
Date Issued
January 2019
Journal
eLife
Publisher
eLife Sciences Publications, Ltd
Citation
Campbell, Ian Winsten, Xiaoxue Zhou and Angelika Amon. “The Mitotic Exit Network integrates temporal and spatial signals by distributing regulation across multiple components.” , vol. 8, 2019, e41139 © 2019 The Author(s)
Version
Final published version
Abstract
GTPase signal transduction pathways control cellular decision making by integrating multiple cellular events into a single signal. The Mitotic Exit Network (MEN), a Ras-like GTPase signaling pathway, integrates spatial and temporal cues to ensure that cytokinesis only occurs after the genome has partitioned between mother and daughter cells during anaphase. Here we show that signal integration does not occur at a single step of the pathway. Rather, sequential components of the pathway are controlled in series by different signals. The spatial signal, nuclear position, regulates the MEN GTPase Tem1. The temporal signal, commencement of anaphase, is mediated by mitotic cyclin-dependent kinase (CDK) phosphorylation of the GTPase's downstream kinases. We propose that integrating multiple signals through sequential steps in the GTPase pathway represents a generalizable principle in GTPase signaling and explains why intracellular signal transmission is a multi-step process. Serial signal integration rather than signal amplification makes multi-step signal transduction necessary.
MIT Department
Massachusetts Institute of Technology. Department of Biology
Koch Institute for Integrative Cancer Research at MIT
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.7554/ELIFE.41139
