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Multidrug-resistant  is a global threat particularly in developing countries like Pakistan. In this study, we identified 2  strains, mnpk and swlpk, by 16S RNA genes, sequenced their draft genome, and compared the 2 genomes with reference strain H37Rv and gene expression analysis of selected virulent genes. Phylogenetic analysis of  strains, mnpk and swlpk, using 16S RNA genes revealed that the strains are closely related with reference strain H37Rv. The draft genome sequence of mnpk and swlpk contains 4305 and 4295 protein-coding genes, respectively, having 99.9% with high collinearity when compared with H37Rv. Although some important drug-resistant genes such as , , and  were missing, genome mining also revealed key drug-resistant genes such as , , , , and  against first-line isoniazid and rifampicin drug. The strain mnpk and swlpk encodes 257 putative and 86 verified virulent genes including type 7 secretion system (T7SS) key genes. The variation in the expression profile of selected T7SS genes, particularly low expression level of , raised concern that the mechanism of virulence of mnpk and swlpk might be different from H37Rv strains as  is associated with ATPase  and  which showed high expression level. Briefly, this study shows that the strains mnpk and swlpk are linked with H37Rv having 99% similarity in genomes, but the absence of drug-resistant genes and variation in key genes' expression profile , , , and  provide a rationale for the future investigation of  mnpk and swlpk pathogenesis via RNA sequencing, single-nucleotide polymorphisms, as well as gene manipulation.

evolutionary bioinformatics online

Comparative Genome Analysis of 2 <i>Mycobacterium Tuberculosis</i> Strains from Pakistan: Insights Globally Into Drug Resistance, Virulence, and Niche Adaptation

Comparative Genome Analysis of 2 Mycobacterium Tuberculosis Strains from Pakistan: Insights Globally Into Drug Resistance, Virulence, and Niche Adaptation