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Intricate Genetic Programs Controlling Dormancy in Mycobacterium tuberculosis

Journal Article · · Cell Reports
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Inst. for Systems Biology, Seattle, WA (United States); OSTI
  2. Inst. for Systems Biology, Seattle, WA (United States)
  3. Inst. for Systems Biology, Seattle, WA (United States); Univ. of Washington, Seattle, WA (United States). Molecular and Cellular Biology Program; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Mycobacterium tuberculosis (MTB) displays the remarkable ability to transition in and out of dormancy, a hallmark of the pathogen’s capacity to evade the immune system and exploit susceptible individuals. Uncovering the gene regulatory programs that underlie the phenotypic shifts in MTB during disease latency and reactivation has posed a challenge. We develop an experimental system to precisely control dissolved oxygen levels in MTB cultures in order to capture the transcriptional events that unfold as MTB transitions into and out of hypoxia-induced dormancy. Using a comprehensive genome-wide transcription factor binding map and insights from network topology analysis, we identify regulatory circuits that deterministically drive sequential transitions across six transcriptionally and functionally distinct states encompassing more than three-fifths of the MTB genome. The architecture of the genetic programs explains the transcriptional dynamics underlying synchronous entry of cells into a dormant state that is primed to infect the host upon encountering favorable conditions.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Institute of Allergy and Infectious Diseases (NIAID); National Science Foundation (NSF); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1816119
Journal Information:
Cell Reports, Journal Name: Cell Reports Journal Issue: 4 Vol. 31; ISSN 2211-1247
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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