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Development of New Vector Systems as Genetic Tools Applicable to Mycobacteria

Mycobacteria에 적용 가능한 genetic tool로서의 새로운 vector system 개발

  • Received : 2013.01.23
  • Accepted : 2013.02.15
  • Published : 2013.02.28

Abstract

The genus Mycobacterium includes crucial animal and human pathogens such as Mycobacterium tuberculosis, Mycobacterium leprae, and Mycobacterium bovis. Although it is important to understand the genetic basis for their virulence and persistence in host, genetic analysis in mycobacteria was hampered by a lack of sufficient genetic tools. Therefore, many functional vectors as molecular genetic tools have been designed for understanding mycobacterial biology, and the application of these tools to mycobacteria has accelerated the study of mechanisms involved in virulence and gene expression. To overcome the pre-existing problems in genetic manipulation of mycobacteria, this paper reports new vector systems as effective genetic tools in Mycobacterium smegmatis. Three vectors were developed; pKOTs is a suicide vector for mutagenesis containing a temperature-sensitive replication origin (TSRO) and the sacB gene encoding levansucrase as a counterselectable marker. pMV306lacZ is an integrative lacZ transcriptional fusion vector that can be inserted into chromosomal DNA by site-specific recombination. pTnMod-OKmTs is a minitransposon vector harboring the TSRO that can be used in random mutagenesis. It was demonstrated in this study that these vectors effectively worked in M. smegmatis. The vector systems reported here are expected to successfully applicable to future research of mycobacterial molecular genetics.

Keywords

Integration vector;minitransposon;mutagenesis;mycobacteria;temperature-sensitive replication origin

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  2. under Respiration-Inhibitory Conditions vol.200, pp.14, 2018, https://doi.org/10.1128/JB.00152-18

Acknowledgement

Supported by : 부산대학교