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Imaging Spatial Reorganization of a MAPK Signaling Pathway Using the Tobacco Transient Expression System
Published on: March 20, 2016
Program-specific distribution of a transcription factor dependent on partner transcription factor and MAPK signaling
Julia Zeitlinger1, Itamar Simon, Christopher T Harbison
1Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA. zeitlinger@wi.mit.edu
Abstract:
Specialized gene expression programs are induced by signaling pathways that act on transcription factors. Whether these transcription factors can function in multiple developmental programs through a global switch in promoter selection is not known. We have used genome-wide location analysis to show that the yeast Ste12 transcription factor, which regulates mating and filamentous growth, is bound to distinct program-specific target genes dependent on the developmental condition. This condition-dependent distribution of Ste12 requires concurrent binding of the transcription factor Tec1 during filamentation and is differentially regulated by the MAP kinases Fus3 and Kss1. Program-specific distribution across the genome may be a general mechanism by which transcription factors regulate distinct gene expression programs in response to signaling.
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