Characterization of temperate phage Che12 and construction of a new tool for diagnosis of tuberculosis

Kumar, Vanaja and Loganathan, Prabakaran and Sivaramkrishnan, Gomathi and Kriakov, J and Dusthackeer, Azger and Subramanyam, Balaji and Chan, J and Jacobs, W R and Rama, Narayanan Paranji (2008) Characterization of temperate phage Che12 and construction of a new tool for diagnosis of tuberculosis. Tuberculosis, 88 (6). pp. 616-623. ISSN Print:1472-9792; Online: 1873-281X

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A temperate phage, Che12, able to infect Mycobacterium tuberculosis, was isolated from soil samples taken from tuberculosis sanatorium area in Chennai, India. The plaque morphology of this phage showed varying grades of turbidity on lawns of M. tuberculosis. The temperate nature of Che12 was established by super infection immunity. Phage integration into the host genomic DNA was confirmed by Southern hybridization using Che12 DNA as a probe. PCR amplification and sequencing of a part of the integrated phage genome in a M. tuberculosis lysogen also confirmed the temperate nature of Che12. The morphology of the phage particles was observed by electron microscopy, revealing similarities to other mycobacteriophages like L5, D29 and TM4. A luciferase reporter phage, phAETRC16, was constructed by cloning firefly luciferase gene into Che12. Infection of viable M. tuberculosis cells by phAETRC16 resulted in expression of luciferase leading to sustained light output. Che12, a true temperate phage infecting M. tuberculosis, is thus ideally suited for developing a diagnostic tool facilitating rapid diagnosis of M. tuberculosis.

Item Type: Article
Uncontrolled Keywords: M. tuberculosis; Temperate; Luciferase reporter phage
Subjects: Tuberculosis > Laboratory Research > Bacteriological
Divisions: Basic Science Research > Bacteriology
Depositing User: Dr. Rathinasabapati R
Date Deposited: 31 Jul 2017 10:18
Last Modified: 25 Mar 2021 05:10

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