Cited by 185Tuberculosis Research and EpidemiologyBacterial Genetics and BiotechnologyMycobacterium research and diagnosis

Essential Role of the ESX-5 Secretion System in Outer Membrane Permeability of Pathogenic Mycobacteria

Open access
Ates, Louis S., Ummels, Roy, Commandeur, Susanna, van der Weerd, Robert, Sparrius, Marion, Weerdenburg, Eveline, Alber, Marina, Kalscheuer, Rainer +8 more·2015·PLOS Genetics

Abstract

Mycobacteria possess different type VII secretion (T7S) systems to secrete proteins across their unusual cell envelope. One of these systems, ESX-5, is only present in slow-growing mycobacteria and responsible for the secretion of multiple substrates. However, the role of ESX-5 substrates in growth and/or virulence is largely unknown. In this study, we show that esx-5 is essential for growth of both Mycobacterium marinum and Mycobacterium bovis. Remarkably, this essentiality can be rescued by increasing the permeability of the outer membrane, either by altering its lipid composition or by the introduction of the heterologous porin MspA. Mutagenesis of the first nucleotide-binding domain of the membrane ATPase EccC5 prevented both ESX-5-dependent secretion and bacterial growth, but did not affect ESX-5 complex assembly. This suggests that the rescuing effect is not due to pores formed by the ESX-5 membrane complex, but caused by ESX-5 activity. Subsequent proteomic analysis to identify crucial ESX-5 substrates confirmed that all detectable PE and PPE proteins in the cell surface and cell envelope fractions were routed through ESX-5. Additionally, saturated transposon-directed insertion-site sequencing (TraDIS) was applied to both wild-type M. marinum cells and cells expressing mspA to identify genes that are not essential anymore in the presence of MspA. This analysis confirmed the importance of esx-5, but we could not identify essential ESX-5 substrates, indicating that multiple of these substrates are together responsible for the essentiality. Finally, examination of phenotypes on defined carbon sources revealed that an esx-5 mutant is strongly impaired in the uptake and utilization of hydrophobic carbon sources. Based on these data, we propose a model in which the ESX-5 system is responsible for the transport of cell envelope proteins that are required for nutrient uptake. These proteins might in this way compensate for the lack of MspA-like porins in slow-growing mycobacteria.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1371/journal.pgen.1005190

Cites

79 of 79 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 80 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Ates, L. S., Ummels, R., Commandeur, S., van der Weerd, R., Sparrius, M., Weerdenburg, E., Alber, M., Kalscheuer, R., Piersma, S. R., Abdallah, A. M., Abd El Ghany, M., Abdel-Haleem, A. M., Pain, A., Jiménez, C. R., Bitter, W., & Houben, E. N. G.
Affiliations
  • Amsterdam UMC Location Vrije Universiteit Amsterdam (NL)
  • Heinrich Heine University Düsseldorf (DE)
  • King Abdullah University of Science and Technology (SA)
  • Vrije Universiteit Amsterdam (NL)
Corresponding author
Houben, Edith N.G.
Venue
PLOS Genetics
Published
2015-05-04
Volume
11
Issue
5
Pages
e1005190
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W1508212288
Cited by
185
References
80
Citations by year
2026: 14 · 2025: 19 · 2024: 15 · 2023: 10 · 2022: 21 · 2021: 18 · 2020: 18 · 2019: 18 · 2018: 15 · 2017: 11 · 2016: 19 · 2015: 7
FWCI
13.47
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion)
  • VU Research Portal (publishedVersion, other-oa)
  • Pure Amsterdam UMC (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
  • King Abdullah University of Science and Technology Repository (King Abdullah University of Science and Technology) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
  • Jürgen Manchot Stiftung
  • European Federation of Pharmaceutical Industries and Associations (FP7/20072013)
  • European Commission (115337, 2007–2013, FP7 2007-2013, FP7/2007)
  • Innovative Medicines Initiative (FP7/2007‐2013, 115337)
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
type VII secretion system, Mycobacterium marinum, Mycobacterium bovis, outer membrane permeability, slow-growing mycobacteria, transposon insertion site sequencing
MeSH terms
Type VII Secretion Systems, Ampicillin, Bacterial Proteins, Cell Membrane Permeability, Chromatography, Liquid, DNA Transposable Elements, DNA, Bacterial, Mutation, Mycobacterium bovis, Mycobacterium tuberculosis, Gene Expression Regulation, Bacterial, Sequence Analysis, DNA, Mycobacterium marinum, Drug Resistance, Bacterial, Tandem Mass Spectrometry

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review