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Mol Biol Int. 2014;2014:937308. doi: 10.1155/2014/937308. Epub 2014 Mar 24.

Primer Based Approach for PCR Amplification of High GC Content Gene: Mycobacterium Gene as a Model.

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1
Department of Biotechnology, Panjab University, Sector 14, Chandigarh 160014, India.

Abstract

The genome of Mycobacterium is rich in GC content and poses problem in amplification of some genes, especially those rich in the GC content in terminal regions, by standard/routine PCR procedures. Attempts have been made to amplify three GC rich genes of Mycobacterium sp. (Rv0519c and Rv0774c from M. tuberculosis and ML0314c from M. leprae). Out of these three genes, Rv0774c gene was amplified with normal primers under standard PCR conditions, while no amplification was observed in case of Rv0519c and ML0314c genes. In the present investigation a modified primer based approach was successfully used for amplification of GC rich sequence of Rv0519c through codon optimization without changing the native amino acid sequence. The strategy was successfully confirmed by redesigning the standard primers with similar modifications followed by amplification of ML0314c gene.

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