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Path-seq identifies an essential mycolate remodeling program for mycobacterial host adaptation

Journal Article · · Molecular Systems Biology
 [1];  [2];  [3];  [4];  [5];  [4];  [3];  [4];  [2];  [3];  [2];  [6]
  1. Inst. for Systems Biology, Seattle, WA (United States); DOE/OSTI
  2. Univ. of Birmingham (United Kingdom)
  3. Seattle Children's Research Inst., Seattle, WA (United States)
  4. Inst. for Systems Biology, Seattle, WA (United States)
  5. IInst. for Systems Biology, Seattle, WA (United States)
  6. Inst. for Systems Biology, Seattle, WA (United States); Univ. of Washington, Seattle, WA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
The success of Mycobacterium tuberculosis (MTB) stems from its ability to remain hidden from the immune system within macrophages. Here, we report a new technology (Path-seq) to sequence miniscule amounts of MTB transcripts within up to million-fold excess host RNA. Using Path-seq and regulatory network analyses, we have discovered a novel transcriptional program for in vivo mycobacterial cell wall remodeling when the pathogen infects alveolar macrophages in mice. We have discovered that MadR transcriptionally modulates two mycolic acid desaturases desA1/desA2 to initially promote cell wall remodeling upon in vitro macrophage infection and, subsequently, reduces mycolate biosynthesis upon entering dormancy. We demonstrate that disrupting MadR program is lethal to diverse mycobacteria making this evolutionarily conserved regulator a prime antitubercular target for both early and late stages of infection
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
Biotechnology and Biological Sciences Research Council (BBSRC); National Institute of Allergy and Infectious Diseases (NIAID); National Institutes of Health (NIH); National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1627939
Journal Information:
Molecular Systems Biology, Journal Name: Molecular Systems Biology Journal Issue: 3 Vol. 15; ISSN 1744-4292
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Dual RNA-Seq of Mtb-Infected Macrophages In Vivo Reveals Ontologically Distinct Host-Pathogen Interactions journal January 2020
Hybridization-based capture of pathogen mRNA enables paired host-pathogen transcriptional analysis journal December 2019
The mycobacterial cell envelope — a moving target journal November 2019
The sensor kinase MtrB of Mycobacterium tuberculosis regulates hypoxic survival and establishment of infection journal October 2019
Alveolar macrophages generate a noncanonical NRF2-driven transcriptional response to Mycobacterium tuberculosis in vivo journal July 2019

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