Cited by 192Tuberculosis Research and EpidemiologyCellular transport and secretionBacterial Genetics and Biotechnology

Mycobacterium tuberculosis Type VII Secreted Effector EsxH Targets Host ESCRT to Impair Trafficking

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Mehra, Alka, Zahra, Aleena, Thompson, Victor, Sirisaengtaksin, Natalie, Wells, Ashley, Porto, Maura, Köster, Stefan, Penberthy, Kristen +7 more·2013·PLoS Pathogens

Abstract

Mycobacterium tuberculosis (Mtb) disrupts anti-microbial pathways of macrophages, cells that normally kill bacteria. Over 40 years ago, D'Arcy Hart showed that Mtb avoids delivery to lysosomes, but the molecular mechanisms that allow Mtb to elude lysosomal degradation are poorly understood. Specialized secretion systems are often used by bacterial pathogens to translocate effectors that target the host, and Mtb encodes type VII secretion systems (TSSSs) that enable mycobacteria to secrete proteins across their complex cell envelope; however, their cellular targets are unknown. Here, we describe a systematic strategy to identify bacterial virulence factors by looking for interactions between the Mtb secretome and host proteins using a high throughput, high stringency, yeast two-hybrid (Y2H) platform. Using this approach we identified an interaction between EsxH, which is secreted by the Esx-3 TSSS, and human hepatocyte growth factor-regulated tyrosine kinase substrate (Hgs/Hrs), a component of the endosomal sorting complex required for transport (ESCRT). ESCRT has a well-described role in directing proteins destined for lysosomal degradation into intraluminal vesicles (ILVs) of multivesicular bodies (MVBs), ensuring degradation of the sorted cargo upon MVB-lysosome fusion. Here, we show that ESCRT is required to deliver Mtb to the lysosome and to restrict intracellular bacterial growth. Further, EsxH, in complex with EsxG, disrupts ESCRT function and impairs phagosome maturation. Thus, we demonstrate a role for a TSSS and the host ESCRT machinery in one of the central features of tuberculosis pathogenesis.

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Authors
Mehra, A., Zahra, A., Thompson, V., Sirisaengtaksin, N., Wells, A., Porto, M., Köster, S., Penberthy, K., Kubota, Y., Dricot, A., Rogan, D., Vidal, M., Hill, D. E., Bean, A. J., & Philips, J. A.
Affiliations
  • New York University (US)
  • The University of Texas Health Science Center at Houston (US)
  • Harvard University (US)
  • The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Philips, Jennifer A.
Venue
PLoS Pathogens
Published
2013-10-31
Volume
9
Issue
10
Pages
e1003734
ISSN
  • 1553-7366 (ISSN-L)
  • 1553-7374
OpenAlex
W2171774303
Cited by
192
References
67
Citations by year
2026: 13 · 2025: 13 · 2024: 14 · 2023: 13 · 2022: 13 · 2021: 18 · 2020: 9 · 2019: 18 · 2018: 19 · 2017: 16 · 2016: 19 · 2015: 15 · 2014: 12
FWCI
11.14
Type
journal article
Language
en
Open access
Locations
  • PLoS Pathogens (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Doris Duke Charitable Foundation
  • Infectious Diseases Society of America
  • Memorial Sloan-Kettering Cancer Center
  • York University
  • University of Leicester
  • National Institutes of Health (HG001715)
  • School of Medicine, New York University
  • Weill Cornell Medical College
  • National Human Genome Research Institute (U01HG001715, HG004233, R01HG001715, U41HG001715, P50HG004233, HG001715)
  • National Institute of Allergy and Infectious Diseases (AI087682, R01AI087682)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
Keywords
Mycobacterium tuberculosis, type VII secretion system, ESCRT, Hrs, HgS, phagosome maturation, lysosomal degradation, multivesicular bodies, intraluminal vesicles, bacterial virulence factors, host-pathogen interaction, intracellular bacterial growth, yeast two-hybrid screen
MeSH terms
Animals, Bacterial Proteins, Cell Wall, Humans, Intracellular Membranes, Lysosomes, Membrane Fusion, Mycobacterium tuberculosis, Phosphoproteins, Endosomes, Tuberculosis, Mice, Endosomal Sorting Complexes Required for Transport, HEK293 Cells, Bacterial Secretion Systems

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