Journal
GENES & DEVELOPMENT
Volume 23, Issue 22, Pages 2604-2609Publisher
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.1823609
Keywords
GAL10; chromatin; gene loops; transcriptional memory
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Funding
- NIH [GM39484, GM68887]
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DNA loops that juxtapose the promoter and terminator regions of RNA polymerase II-transcribed genes have been identified in yeast and mammalian cells. Loop formation is transcription-dependent and requires components of the pre-mRNA 3'-end processing machinery. Here we report that looping at the yeast GAL10 gene persists following a cycle of transcriptional activation and repression. Moreover, GAL10 and a GAL1p-SEN1 reporter undergo rapid reactivation kinetics following a cycle of activation and repression-a phenomenon defined as transcriptional memory''-and this effect correlates with the persistence of looping. We propose that gene loops facilitate transcriptional memory in yeast.
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