Cloning and expression of a mureinolytic enzyme from the mycobacteriophage TM4

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Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.



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FEMS Microbiology Letters


In this study, we describe the characterization, cloning, expression and purification of the lysin A gene of the mycobacteriophage TM4. The gene TM4-gp29 (gp29) is a 1644-bp gene that codes for a 58.6-kDa protein and contains peptidoglycan recognition protein, Zn-binding and amidase catalytic domains. The gene was cloned into Escherichia coli using the 'His-Tag' pQE60 vector. After affinity chromatography-mediated purification, the protein was concentrated and visualized using sodium dodecyl sulphate polyacrylamide gel electrophoresis. Evidence of peptidoglycan-degrading activity was observed initially by a chloroform assay and later by conventional zymogram analysis. © 2010 Federation of European Microbiological Societies.

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