Development of a New Generation of Vectors for Gene Expression, Gene Replacement, and Protein-Protein Interaction Studies in Mycobacteria

Parikh, Amit and Kumar, Devanand and Chawla, Yogesh and Kurthkoti, Krishna and Khan, Shazia and Varshney, Umesh and Nandicoori, Vinay K (2013) Development of a New Generation of Vectors for Gene Expression, Gene Replacement, and Protein-Protein Interaction Studies in Mycobacteria. In: APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 79 (5). pp. 1718-1729.

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Abstract

Escherichia coli-mycobacterium shuttle vectors are important tools for gene expression and gene replacement in mycobacteria. However, most of the currently available vectors are limited in their use because of the lack of extended multiple cloning sites (MCSs) and convenience of appending an epitope tag(s) to the cloned open reading frames (ORFs). Here we report a new series of vectors that allow for the constitutive and regulatable expression of proteins, appended with peptide tag sequences at their N and C termini, respectively. The applicability of these vectors is demonstrated by the constitutive and induced expression of the Mycobacterium tuberculosis pknK gene, coding for protein kinase K, a serine-threonine protein kinase. Furthermore, a suicide plasmid with expanded MCS for creating gene replacements, a plasmid for chromosomal integrations at the commonly used L5 attB site, and a hypoxia-responsive vector, for expression of a gene(s) under hypoxic conditions that mimic latency, have also been created. Additionally, we have created a vector for the coexpression of two proteins controlled by two independent promoters, with each protein being in fusion with a different tag. The shuttle vectors developed in the present study are excellent tools for the analysis of gene function in mycobacteria and are a valuable addition to the existing repertoire of vectors for mycobacterial research.

Item Type:	Journal Article
Publication:	APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Publisher:	AMER SOC MICROBIOLOGY
Additional Information:	Copyright for this article belongs to AMER SOC MICROBIOLOGY, WASHINGTON
Department/Centre:	Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited:	22 Mar 2013 07:27
Last Modified:	22 Mar 2013 07:27
URI:	http://eprints.iisc.ac.in/id/eprint/46156

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