Amentoflavone and 4' monomethoxy amentoflavone were previously isolated from Garcinia livingstonei leaves. These compounds had good activities (MIC 6 and 8 μg/ml) against some nosocomial bacteria. In this study, the activity of these purified compounds were tested against fast-growing non-pathogenic Mycobacterium smegmatis. Amentoflavone was the most active compound, with an MIC of 0.60 ± 0.70 ...

Nisin is a bacteriocin produced by many strains of Lactococcus lactis. This study examined the effect of nisin on Mycobacterium smegmatis, a non-pathogenic species of Mycobacterium. Nisin had a minimum inhibitory concentration of 8.0 micrograms ml-1 and a minimum inhibitory dose of 7.5 micrograms ml-1 against Myco. smegmatis. Treatment with 25.0 micrograms ml-1 nisin caused partial inhibition o...

The ponA gene of Mycobacterium smegmatis encodes a 95-kDa penicillin binding protein, PBP1, that is similar to PBP1s of Mycobacterium tuberculosis and Mycobacterium leprae. Transposon disruption of ponA in M. smegmatis resulted in a PBP1-deficient mutant that was sensitive to beta-lactam antibiotics, was more permeable to glycine, and grew slowly in liquid culture.

Citation: Dang G, Cui Y, Wang L, Li T, Cui Z, Song N, Chen L, Pang H and Liu S (2018) Extracellular Sphingomyelinase Rv0888 of Mycobacterium tuberculosis Contributes to Pathological Lung Injury of Mycobacterium smegmatis in Mice via Inducing Formation of Neutrophil Extracellular Traps. Front. Immunol. 9:677. doi: 10.3389/fimmu.2018.00677 extracellular sphingomyelinase rv0888 of Mycobacterium tu...

The isolation of elements driving high-level expression of foreign genes in mycobacteria would significantly aid characterization of mycobacterial antigens and recombinant vaccine development. Mycobacterium smegmatis is a widely employed host for recombinant mycobacterial gene expression. This report describes the identification of strong promoter elements of M. smegmatis. Fluorescence-activate...

The extracytoplasmic function (ECF) sigma factors constitute a diverse group of alternative sigma factors that have been demonstrated to regulate gene expression in response to environmental conditions in several bacterial species. Genes encoding an ECF sigma factor of Mycobacterium tuberculosis, Mycobacterium avium, and Mycobacterium smegmatis, designated sigE, were cloned and analyzed. Southe...

Nine unidentified marine sponges from Bunaken Island waters in Manado Indonesia were observed on anti-tuberculosis (TB) against non-pathogenic Mycobacterium smegmatis NBRC 3207 and it was found that the ethanol crude extracts ODS fractions of these inhibited growth bacteria M. smegmatis. Sponge SP.323 is most inhibiting showed Intermediate (I) activity with inhibition zones 9, 11, 8 mm/disk at ...

The dataset presented here describes a microarray experiment to identify the AmtR regulon of Mycobacterium smegmatis comparing the transcription profile of a M. smegmatis amtR mutant to M. smegmatis wild-type. The raw and processed microarray data are available in the ArrayExpress database under Accession Number E-MTAB-4857 and interpretation of this data is found in the research article "Struc...

Human peripheral blood monocytes are permissive for the growth of Mycobacterium tuberculosis, but the fate of nonpathogenic Mycobacterium smegmatis in these cells is not known. Since M. smegmatis may be used as a host with which to express and screen for M. tuberculosis genes needed for survival in monocytes, we determined whether human peripheral blood monocytes could restrict the growth of My...

The pathogenicity of mycobacterial infections depends on virulence factors that mediate survival inside host macrophages. These virulence factors are generally believed to be specific for pathogenic species and absent or mutated in non-pathogenic strains. The serine/threonine protein kinase G (PknG) mediates survival of mycobacteria within macrophages by blocking lysosomal delivery. Here we des...