Applied Microbiology and Biotechnology

, Volume 102, Issue 16, pp 7123–7133 | Cite as

Mycobacterium tuberculosis toxin Rv2872 is an RNase involved in vancomycin stress response and biofilm development

  • Xiaoyu Wang
  • Xiaokang Zhao
  • Hao Wang
  • Xue Huang
  • Xiangke Duan
  • Yinzhong Gu
  • Nzungize Lambert
  • Ke Zhang
  • Zhenhao Kou
  • Jianping Xie
Applied microbial and cell physiology


Bacterial toxin–antitoxin (TA) systems are emerging important regulators of multiple cellular physiological events and candidates for novel antibiotic targets. To explore the role of Mycobacterium tuberculosis function, unknown toxin gene Rv2872 was heterologously expressed in Mycobacterium smegmatis (MS_Rv2872). Upon induction, MS_Rv2872 phenotype differed significantly from the control, such as increased vancomycin resistance, retarded growth, cell wall, and biofilm structure. This phenotype change might result from the RNase activity of Rv2872 as purified Rv2872 toxin protein can cleave the products of several key genes involved in abovementioned phenotypes. In summary, toxin Rv2872 was firstly reported to be a endonuclease involved in antibiotic stress responses, cell wall structure, and biofilm development.


Toxin–antitoxin (TA) Antimicrobial resistance Biofilm RNase 



We thank Professor Huang Hairong of Beijing Thoracic Hospital for providing the M. tuberculosis H37Rv genomic DNA and Professor Li Hongtao at School of Life Sciences, Southwest University, for the Western blot experiment support. This work was supported by National Natural Science Foundation (81371851, 81071316, 81271882, 81301394, 81172806, 81471563), National key R & D plan (2016YFC0502304), the Fundamental Research Funds for the Central Universities (XDJK2017D101, XDJK2017D100, XDJK2017D099) and Chongqing Municipal Education Science foundation (2015-JC-020).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any other authors.

Supplementary material

253_2018_9132_MOESM1_ESM.pdf (4.3 mb)
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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life SciencesSouthwest UniversityChongqingChina

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