Regulation and overexpression studies of YidC in Mycobacterium tuberculosis

The preprotein translocase, YidC is an envelope protein which controls respiratory metabolism in Mycobacterium tuberculosis . Previously, we have established that depletion of yidC is deleterious for both extra- and intracellular proliferation of M . tuberculosis ; however, it remains unclear how Yi...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2018-11, Vol.8 (1), p.17114-12, Article 17114
Main Authors: Thakur, Preeti, Choudhary, Eira, Pareek, Madhu, Agarwal, Nisheeth
Format: Article
Language:English
Subjects:
101/28
38
38/61
38/77
631/326
631/326/421
82/80
Cell surface
Growth conditions
Humanities and Social Sciences
multidisciplinary
Mycobacterium tuberculosis
Preprotein translocase
Protein turnover
Proteins
Science
Science (multidisciplinary)
Transcription
Translocase
Tuberculosis
Viral envelope proteins
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The preprotein translocase, YidC is an envelope protein which controls respiratory metabolism in Mycobacterium tuberculosis . Previously, we have established that depletion of yidC is deleterious for both extra- and intracellular proliferation of M . tuberculosis ; however, it remains unclear how YidC expression is regulated under different growth conditions and whether its altered expression impact mycobacterial physiology. Herein, we show that yidC is expressed as an operon with upstream genes. Interestingly, expression analysis under various stress conditions reveals a distinct paradox in the profile of the yidC mRNA transcripts and the YidC protein. While YidC protein level is moderately elevated upon bacterial exposure to cell surface stresses, the corresponding mRNA transcript levels are significantly repressed under these conditions. In contrast, overexpression of M . tuberculosis yidC under a strong anhydrotetracycline-inducible promoter results in significant induction of YidC protein. Additionally, we also observe that overexpression of M . tuberculosis yidC , and not of its counterpart from fast-growing M . smegmatis , results in altered in vitro growth of bacteria, compromised integrity of bacterial cell envelope and differential expression of a small set of genes including those which are regulated under detergent stress. Overall findings of our study suggest that YidC proteins of slow- and fast-growing mycobacteria are functionally distinct despite exhibiting a great deal of identity.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-35475-4