Publications by Claudia Sala | EPFL Graph Search

Related publications (41)

FasR Regulates Fatty Acid Biosynthesis and Is Essential for Virulence of Mycobacterium tuberculosis

Mycobacterium tuberculosis, the etiologic agent of human tuberculosis, is the world's leading cause of death from an infectious disease. One of the main features of this pathogen is the complex and dynamic lipid composition of the cell envelope, which adap ...

Frontiers Media SA2020

Rv3852 (H-NS) of Mycobacterium tuberculosis Is Not Involved in Nucleoid Compaction and Virulence Regulation

Stewart Cole, Claudia Sala, Andrej Benjak, Anthony Vocat, Gaëlle Séraphine Kolly, Andréanne Lupien, Nina Theres Odermatt

A handful of nucleoid-associated proteins (NAPs) regulate the vast majority of genes in a bacterial cell. H-NS, the histone-like nucleoid-structuring protein, is one of these NAPs and protects Escherichia coli from foreign gene expression. Though lacking a ...

American Society for Microbiology2017

A Simple Model for Testing Drugs against Non-replicating Mycobacterium tuberculosis

Stewart Cole, Neeraj Dhar, Claudia Sala, Ruben Hartkoorn, Ming Zhang

Non-replicating or dormant cells of Mycobacterium tuberculosis constitute a challenge to tuberculosis (TB) therapy because of their tolerance or phenotypic resistance to most drugs. Here, we propose a simple model for testing drugs against non-growing cell ...

2010

High-resolution detection of DNA binding sites of the global transcriptional regulator GlxR in Corynebacterium glutamicum

Stewart Cole, Claudia Sala, Swapna Uplekar

The transcriptional regulator GlxR has been characterized as a global hub within the gene-regulatory network of Corynebacterium glutamicum. Chromatin immunoprecipitation with a specific anti-GlxR antibody and subsequent high-throughput sequencing (ChIP-seq ...

Soc General Microbiology2013

EspL is essential for virulence and stabilizes EspE, EspF and EspH levels in Mycobacterium tuberculosis

Sofia Ulrika Magnusdotter Von Schultz, Stewart Cole, Claudia Sala, Andrej Benjak, Nina Theres Odermatt, Paloma Julia Soler Arnedo

The ESX-1, type VII, secretion system represents the major virulence determinant of Mycobacterium tuberculosis, one of the most successful intracellular pathogens. Here, by combining genetic and high-throughput approaches, we show that EspL, a protein of 1 ...

PUBLIC LIBRARY SCIENCE2018

Assessing essentiality of transketolase in Mycobacterium tuberculosis using an inducible protein degradation system

Stewart Cole, Claudia Sala, Anthony Vocat, Gaëlle Séraphine Kolly

Improved genetic tools are required to identify new drug targets in Mycobacterium tuberculosis. To this aim, genetic approaches, targeting either transcription and/or protein degradation, have been developed to appraise gene essentiality and to test the im ...

Wiley-Blackwell2014

Transcription facilitated genome-wide recruitment of topoisomerase I and DNA gyrase

Stewart Cole, Claudia Sala, Wareed Ahmed

Movement of the transcription machinery along a template alters DNA topology resulting in the accumulation of supercoils in DNA. The positive supercoils generated ahead of transcribing RNA polymerase (RNAP) and the negative supercoils accumulating behind i ...

Public Library Science2017

Streptomycin-Starved Mycobacterium tuberculosis 18b, a Drug Discovery Tool for Latent Tuberculosis

Stewart Cole, Claudia Sala, Neeraj Dhar, Ruben Hartkoorn, Ming Zhang

Mycobacterium tuberculosis 18b, a streptomycin (STR)-dependent mutant that enters a viable but nonreplicating state in the absence of STR, has been developed as a simple model for drug testing against dormant bacilli. Here, we further evaluated the STR-sta ...

Amer Soc Microbiology2012

The Inosine Monophosphate Dehydrogenase, GuaB2, Is a Vulnerable New Bactericidal Drug Target for Tuberculosis

Stewart Cole, John McKinney, Claudia Sala, Neeraj Dhar, Anthony Vocat, Ruben Hartkoorn, Andréanne Lupien, Raphael Christopher Sommer

VCC234718, a molecule with growth inhibitory activity against Mycobacterium tuberculosis (Mtb), was identified by phenotypic screening of a 15344-compound library. Sequencing of a VCC234718-resistant mutant identified a Y487C substitution in the inosine mo ...

Amer Chemical Soc2017

Multicenter analysis of sputum microbiota in tuberculosis patients

Stewart Cole, Claudia Sala, Andrej Benjak, Marion Leleu, Philippe Busso, Jacques Rougemont

The impact of tuberculosis and of anti-tuberculosis therapy on composition and modification of human lung microbiota has been the object of several investigations. However, no clear outcome has been presented so far and the relationship betweenM.tuberculos ...

2020

Development of a repressible mycobacterial promoter system based on two transcriptional repressors

Stewart Cole, Neeraj Dhar, Claudia Sala

Tightly regulated gene expression systems represent invaluable tools for studying gene function and for the validation of drug targets in bacteria. While several regulated bacterial promoters have been characterized, few of them have been successfully used ...

Oxford University Press2010

Transcriptional regulation of lipid homeostasis in mycobacteria

Stewart Cole, Claudia Sala

Mycolic acids are major components of the cell envelope of mycobacteria, such as Mycobacterium tuberculosis, and play an important role in its architecture, impermeability and interaction with the environment. Synthesis of mycolic acids is carried out by t ...

2010

Genome-Wide Definition of the SigF Regulon in Mycobacterium tuberculosis

Stewart Cole, Jacques Rougemont, Claudia Sala, Ruben Hartkoorn, Philippe Busso, Swapna Uplekar

In Mycobacterium tuberculosis the alternative sigma factor SigF controls the expression of a particular subset of genes by altering RNA polymerase specificity. Here, we utilize two genome-wide approaches to identify SigF-binding sites: chromatin immunoprec ...

American Society for Microbiology2012

Promoter mutagenesis for fine-tuning expression of essential genes in Mycobacterium tuberculosis

Stewart Cole, Claudia Sala, Gaëlle Séraphine Kolly

A range of regulated gene expression systems has been developed for mycobacteria in the last few years to facilitate the study of essential genes, validate novel drug targets and evaluate their vulnerability. Among these, the TetR/Pip-OFF repressible promo ...

Wiley2018

Polarly Localized EccE(1) Is Required for ESX-1 Function and Stabilization of ESX-1 Membrane Proteins in Mycobacterium tuberculosis

Stewart Cole, Claudia Sala, Ming Zhang, Jérémie Piton, Paloma Julia Soler Arnedo

Mycobacterium tuberculosis is a slow-growing intracellular bacterium with the ability to induce host cell death and persist indefinitely in the human body. This pathogen uses the specialized ESX-1 secretion system to secrete virulence factors and potent im ...

American Society for Microbiology2020

The PhoP-Dependent ncRNA Mcr7 Modulates the TAT Secretion System in Mycobacterium tuberculosis

Stewart Cole, Jacques Rougemont, Claudia Sala, Andrej Benjak, Swapna Uplekar

The PhoPR two-component system is essential for virulence in Mycobacterium tuberculosis where it controls expression of approximately 2% of the genes, including those for the ESX-1 secretion apparatus, a major virulence determinant. Mutations in phoP lead ...

Public Library of Science2014

Mycobacterium ulcerans Mouse Model Refinement for Pre-Clinical Profiling of Vaccine Candidates

Claudia Sala

Buruli Ulcer is a neglected tropical disease leading to extensive disabilities and morbidity in West Africa. In this paper we sought to characterize various strains of Mycobacterium ulcerans (M. ulcerans) with different origins and laboratory passage recor ...

Public Library of Science2016

Virulence Regulator EspR of Mycobacterium tuberculosis Is a Nucleoid-Associated Protein

Stewart Cole, Jacques Rougemont, Claudia Sala, Florence Pojer, Ruben Hartkoorn, Swapna Uplekar, Benjamin Blasco

The principal virulence determinant of Mycobacterium tuberculosis (Mtb), the ESX-1 protein secretion system, is positively controlled at the transcriptional level by EspR. Depletion of EspR reportedly affects a small number of genes, both positively or neg ...

Public Library of Science2012

The katG mRNA of Mycobacterium tuberculosis and Mycobacterium smegmatis is processed at its 5 ' end and is stabilized by both a polypurine sequence and translation initiation

Claudia Sala

Background: In Mycobacterium tuberculosis and in Mycobacterium smegmatis the furA-katG loci, encoding the FurA regulatory protein and the KatG catalase-peroxidase, are highly conserved. In M. tuberculosis furA-katG constitute a single operon, whereas in M. ...

BioMed Central2008

Tuberculosis drugs: new candidates and how to find more

Claudia Sala, Ruben Hartkoorn

The recent years have witnessed significant progress in the development of new drug candidates for the treatment of TB. While many of these are now in clinical trials, continued research is needed in order to sustain the drug discovery pipeline and meet th ...

2011