Abstract
Mycobacterial species is known for inhabiting various niches ranging from soil to harsh intracellular environment of animal hosts and their survival through constant changes. For survival and persistence, these organisms must quickly adapt by bringing shift in their metabolism. Metabolic shifts are brought by sensing the environmental cues usually by membrane localized sensor molecules. These signals are transmitted to regulators of various metabolic pathways leading to post-translational modifications of regulators ultimately resulting in altered metabolic state of the cell. Multiple regulatory mechanisms have been unearthed so far that play crucial role in adapting to these situations, and among them, the signal-dependent transcriptional regulators mediated responses are integral for the microbes to perceive environmental signals and generate appropriate adaptive responses. LysR-type transcriptional regulators (LTTRs) form the largest family of transcriptional regulators, which are present in all kingdoms of life. Their numbers vary among bacterial genera and even in different mycobacterial species. To understand the evolutionary aspect of pathogenicity based on LTTRs, we performed phylogenetic analysis of LTTRs encoded by several mycobacterial species representing non-pathogenic (NP), opportunistic (OP), and totally pathogenic (TP) mycobacteria. Our results showed that LTTRs of TP clustered separately from LTTRs of NP and OP mycobacteria. In addition, LTTRs frequency per Mb of genome was reduced in TP when compared with NP and OP. Further, the protein–protein interactions and degree-based network analysis showed concomitant increased interactions per LTTRs with increase in pathogenicity. These results suggested the increase in regulon of LTTRs during evolution of TP mycobacteria.
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Data availability
The sequnce data used in the study is availble on public database domain like NCBI.
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Data curation: ET, NS, CCK; formal analysis: ET, NS, CCK, VG; investigation: ET, NS, CCK; Methodology: ET, NS, CCK; validation: ET, NS, CCK; writing—original draft: ET, NS, CCK; Writing—review & editing: ET, NS, CCK, VG, TB, RS, RKSe, YS; supervision: RS, RKS, YS; conceptualization: YS; funding acquisition: YS; project administration: YS; resources: YS.
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Tyagi, E., Singhvi, N., Keshavam, C.C. et al. Phylogenetic analysis and interactomics study unveil gene co-optive evolution of LysR-type transcription regulators across non-pathogenic, opportunistic, and pathogenic mycobacteria. 3 Biotech 13, 168 (2023). https://doi.org/10.1007/s13205-023-03583-2
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DOI: https://doi.org/10.1007/s13205-023-03583-2