Cited by 84Tuberculosis Research and EpidemiologyBacterial Genetics and BiotechnologyMycobacterium research and diagnosis

Intercellular communication and conjugation are mediated by ESX secretion systems in mycobacteria

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Gray, Todd A., Clark, Ryan R., Boucher, Nathalie, Lapierre, Pascal, Smith, Carol, Derbyshire, Keith M.·2016·Science

Abstract

Conseting mycobacteria: Mycobacteria encompass several slow-growing pathogens, including organisms that cause leprosy and tuberculosis. Mycobacteria use a component of their ESX (or Type VII) secretion system for a distinctive form of genetic exchange called distributive conjugal DNA transfer. Gray et al. investigated a quicker-growing model species, Mycobacterium smegmatis. They found that the secretory apparatus, ESX-4, is essential for DNA transfer into the recipient but is not required for donor cells to pass along their DNA. The ESX-1 secretory apparatus was required in the recipient for ESX-4 induction, but it did not appear to provide the physical channel for DNA. Rather, ESX-1 may secrete cell-surface “mating factor” receptors. More research will be needed to understand the details of this intriguing means of DNA exchange in mycobacteria. Science , this issue p. 347

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  • RNA-seq analysis demonstrated that donor and recipient cells have specific transcriptional responses to direct contact with the opposite mating type.

    “RNA-seq analysis demonstrated that donor and recipient cells have specific transcriptional responses to direct contact with the opposite mating type.”

    From Mycobacterium smegmatis: The Vanguard of Mycobacterial Research (2023) · cites this paper as [58]

    The RNA-profiling passage (indexed under Abstract; page unavailable) describes strain-specific analysis of donor and recipient cells in coculture. The contact-separation passage shows that direct cell-cell contact is required for the recipient’s esx4 transcriptional response, but it does not establish that donor transcriptional responses require direct contact. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Contact-dependent activation of ESX-4 in the recipient is regulated by ESX-1 activity in the donor, providing the first direct evidence for mycobacterial cell-cell communication.

    “This contact-dependent activation of ESX-4 in the recipient is regulated by ESX-1 activity in the donor providing the first direct evidence for mycobacterial cell-cell communication (58).”
  • The ESX-4 secretion system is transcriptionally activated in the recipient on donor contact and is essential for DCT.

    “Notably, the ESX-4 secretion system is transcriptionally activated in the recipient on donor contact and is essential for DCT (58).”
  • The ESX-4 system of M. smegmatis is also involved in this DCT procedure.

    “This procedure apparently also involves the ESX-4 system of M. smegmatis (53).”

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Authors
Gray, T. A., Clark, R. R., Boucher, N., Lapierre, P., Smith, C., & Derbyshire, K. M.
Affiliations
New York State Department of Health (US)
Corresponding author
  • Gray, Todd A.
  • Derbyshire, Keith M.
Venue
Science
Published
2016-10-21
Volume
354
Issue
6310
Pages
347-350
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2535274628
Cited by
84
References
22
Citations by year
2026: 2 · 2025: 10 · 2024: 10 · 2023: 6 · 2022: 8 · 2021: 10 · 2020: 7 · 2019: 12 · 2018: 10 · 2017: 8 · 2016: 1
FWCI
9.54
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Allergy and Infectious Diseases (R01AI097191, R21AI07258)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Epidemiology › Mycobacterium research and diagnosis
Keywords
ESX secretion system, ESX-1, intercellular communication, bacterial conjugation, Mycobacterium smegmatis, gene expression regulation, co-culture
MeSH terms
Type VII Secretion Systems, Bacterial Proteins, Conjugation, Genetic, Mutation, Transcription, Genetic, Gene Expression Regulation, Bacterial, Mycobacterium smegmatis

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