Mycobacterium smegmatis

The genus Mycobacterium contains several slow-growing human pathogens, including Mycobacterium tuberculosis, Mycobacterium leprae, and Mycobacterium avium.

A series of structome analyses, that is, quantitative and three-dimensional structural analysis of a whole cell at the electron microscopic level, have already been achieved individually in Exophiala dermatitidis, Saccharomyces cerevisiae, Mycobacterium tuberculosis , Myojin spiral bacteria, and Escherichia coli. In these analyses, sample cells were processed through cryo-fixation and rapid freeze-substitution, resulting in the exquisite preservation of ultrastructures on the serial ultrathin sections examined by transmission electron microscopy. In this paper, structome analysis of non pathogenic Mycolicibacterium smegmatis , basonym Mycobacterium smegmatis , was performed. Seven M. Cell profiles were measured, including cell length, diameter of cell and cytoplasm, surface area of outer membrane and plasma membrane, volume of whole cell, periplasm, and cytoplasm, and total ribosome number and density per 0.

Mycobacterium smegmatis

Mycobacterium smegmatis is an acid-fast bacterial species in the phylum Actinomycetota and the genus Mycobacterium. It is 3. It was first reported in November by Lustgarten, who found a bacillus with the staining appearance of tubercle bacilli in syphilitic chancres. Subsequent to this, Alvarez and Tavel found organisms similar to that described by Lustgarten also in normal genital secretions smegma. This organism was later named M. Some species of the genus Mycobacterium have recently been renamed to Mycolicibacterium , so that M. Essentially, the bacteria form a single-layered sheet and are able to move slowly together without the use of any extracellular structures, like flagella or pili. For example, this sliding ability is correlated with the presence of glycopeptidolipids GLPs on the outermost part of the cell wall. GLPs are amphiphilic molecules that could potentially decrease surface interactions or create a conditioning film that allows movement. Although the exact role of GLPs in sliding is not known, without them M.

Compared with E.

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The soil bacterium Mycobacterium smegmatis is able to scavenge the trace concentrations of H 2 present in the atmosphere, but the physiological function and importance of this activity is not understood. In this study, we explored the effect of deleting Hyd2 on cellular physiology by comparing the viability, energetics, transcriptomes, and metabolomes of wild-type vs. Hyd1 compensated for loss of Hyd2 when cells were grown in a high H 2 atmosphere. Analysis of cellular parameters showed that Hyd2 was not necessary to generate the membrane potential, maintain intracellular pH homeostasis, or sustain redox balance. We propose that atmospheric H 2 oxidation has two major roles in mycobacterial cells: to generate reductant during mixotrophic growth and to sustain the respiratory chain during dormancy. This is an open-access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Data Availability: The authors confirm that all data underlying the findings are fully available without restriction. All relevant data are within the paper and its Supporting Information files. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Mycobacterium smegmatis

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Discovery of new anti-tuberculosis TB drugs is a time-consuming process due to the slow-growing nature of Mycobacterium tuberculosis Mtb. A requirement of biosafety level 3 BSL-3 facility for performing research associated with Mtb is another limitation for the development of TB drug discovery. In our screening of BSL-1 Mycobacterium spp. This is a preview of subscription content, access via your institution. Lauzardo M, Peloquin CA. Tuberculosis therapy for and beyond.

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In , researchers reported extracting from M. Structome of Saccharomyces cerevisiae determined by freeze-substitution and serial ultrathin-sectioning electron microscopy. Upon comparing with M. Oren, A. Three-dimensional cell properties of seven M. Multivalent antimicrobial polymer nanoparticles target mycobacteria and Gram-negative bacteria by distinct mechanisms. Strains of M. Article Talk. Verma, A. Structome of Exophiala yeast cells determined by freeze-substitution and serial ultrathin sectioning electron microscopy. One-dimensional data of 7 M. In cell diameter, seven cells showed similar values to each other. These data were compared with those of M.

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This is the first report on the surface area of the M. Characterization of MLc of Mycobacterium leprae and deciphering its role in the immune response in leprosy patients. In seven M. Kai Terabase Inc. Although the Snm secretion system is a key in determining M. Cell profiles were measured, including cell length, diameter of cell and cytoplasm, surface area of outer membrane and plasma membrane, volume of whole cell, periplasm, and cytoplasm, and total ribosome number and density per 0. The evidence supports our data that the cytoplasmic ribosome density of M. On the contrary, cell diameter measured in CryoTEM examination ranged from 0. These data were compared with those of M. Genome Announcements. Furthermore, average whole cell diameter of M. The discovery of plasmids , phages , and mobile genetic elements has enabled the construction of dedicated gene-inactivation and gene reporter systems. Biomacromolecules 19, —