Project description:Mycobacterium dioxanotrophicus PH-06 can degrade 1,4-dioxane (dioxane), which is a groundwater contaminant of emerging concern. In order to find the genes involved in dioxane degradation. RNA sequencing was first used to investigate gene expression levels of PH-06 during growth on two different carbon sources (dioxane and glucose). The sequencing shows that a monooxygenase gene cluster was upregulated when treated with dioxane relative to glucose.
Project description:This study performed transcriptome sequencing of two newly identified Mycobacterium species, Mycobacterium camsae and Mycobacterium pumcae, under standard culture conditions to establish baseline gene expression profiles. RNA was extracted from cells grown to mid-log phase in standard medium and sequenced using Illumina paired-end technology. The data provide a foundational resource for future functional studies of these novel strains.
Project description:We present the data obtained from high-resolution ribosome profiling analysis of Mycobacterium tuberculosis grown under standard conditions (log phase) and cells subjected to oxidative stress (50 µM cumene hydroperoxide) and pH stress (pH 4.5). Our data shows pervasive ribosome pausing in the M. tb translatome. A large number of genes show very high pause immediately downstream to the translation start site. Moreover, serines and alanines in the E site of the ribosome exhibit highest pause scores.
Project description:Mycobacterium tuberculosis (Mtb) survives host defenses by adapting to the environmental conditions during infection. A critical survival strategy involves pH homeostasis, mediated by complex signalling systems that regulate metabolic reprogramming and stress responses. While the lysine acetyltransferase Rv0998 is known to support Mtb hypoxia adaptation and metabolic flexibility, its role in acid stress remains unexplored. Here, we investigate how Rv0998 enables acid tolerance by analysing the transcriptomic profiles of the strains under physiological pH (pH 6.8) and acidic pH that mimics phagosomal environment (pH 5.7).
Project description:The success of Mycobacterium tuberculosis (Mtb) is largely due to its ability to withstand numerous stresses imposed by host immunity. Here, we present a data-driven model that captures these adaptive mechanisms and reveals the dynamic interplay of host-derived stresses and genome-encoded regulatory programs in Mtb. The model captures the genome-wide distribution of cis-acting gene regulatory elements and the conditional influences of transcription factors at those elements to elicit environment-specific responses. Analysis of transcriptional responses that may be essential for Mtb’s survival in acidic conditions identified regulatory control by the MtrAB two-component signal system. This data is a comparison of transcriptional differences (RNA-seq) between low pH (pH 5.6) and neutral pH (pH7) of Mtb
Project description:Comparing the transcriptomic responses between the Mycobacterium avium subspecies paratuberculosis (MAP) leuD mutant with the parent strain K-10 under different environmental stresses: nutrition, temperature, anaerobic conditions, high- and low- pH conditions.
Project description:<p><em>Mycobacterium tuberculosis</em> (Mtb) survives host defences by adapting to host conditions, including acid stress, during infection. A critical survival strategy involves pH homeostasis, mediated by complex signalling systems that regulate metabolic reprogramming and stress responses. While the lysine acetyltransferase Rv0998 is known to support Mtb hypoxia adaptation and metabolic flexibility, its role in acid stress remains unexplored. Here, we investigate the consequences of<em> rv0998</em> deletion in 7H9 with glucose as the major carbon source. RNA-seq analysis showed that loss of Rv0998 broadly altered the transcriptional response to acidic pH, including changes in the DosR regulon and <em>pfkB</em>/<em>rv2029c</em>. Stable isotope tracing with [U-13C6]-glucose further showed reduced fractional 13C labelling across central carbon metabolites in the <em>rv0998</em> mutant, with the largest decrease at acidic pH observed in upper glycolytic and connected hexose-phosphate intermediates. Growth and glucose-labelling phenotypes of <em>dosR</em> and <em>pfkB</em> mutants provided focused examples of stress-responsive and carbon-metabolic processes associated with the broader Rv0998 response. These findings indicate that Rv0998 contributes to coordinated transcriptional and metabolic adaptation of Mtb to acidic pH and provide a basis for dissecting how stress-responsive regulatory programmes are coupled to carbon metabolism during acid adaptation.</p>
Project description:The purpose of this study was to determine (i) the interplay between Mycobacterium tuberculosis response to acidic pH and cholesterol, two signals experienced concurrently by the bacterium during host colonization, and (ii) the role of the transcription factor Mce3R in regulation of this response.
Project description:We sought to identify which genes were dysregulated in hypoxic Mycobacterium tuberculosis upon treatment with C10. We cultured Mycobacterium tuberculosis in an air-tight vessel for 2 weeks in the presence of either DMSO or 50 μM C10, and used RNA-sequencing to compare transcriptional profiles.