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Mutational and Evolutionary Analysis of Interleukin-2 Gene in Pakistani Goat Breeds

Mutational and Evolutionary Analysis of Interleukin-2 Gene in Pakistani Goat Breeds

Tanveer Hussain1, Abdul Wajid1, Jabbar Khan2, Asif Nadeem1, Misbah Hussain1, Qurat ul-Ain1 and Masroor Babar1*

1Department of Molecular Biology, Virtual University of Pakistan, Lahore, Punjab, Pakistan
2Institute of Biological Sciences, Gomal University, Dera Ismail Khan, Pakistan
* Corresponding author:


Interleukin 2 (IL-2) is produced by activated T cells and play important role in immune response against antigen. It acts in both autocrine and paracrine manner. It can stimulate B cells and various other phagocytic cells like monocytes, lymphokine-activated killer cells and natural killer cells. Acting in autocrine fashion, IL-2 protein plays a crucial role in proliferation of T cells. IL-2 triggers the release of pro and anti- inflammatory cytokines by activating several pathways. In present study, exon 1 of IL-2 gene of four local Pakistani breeds (Dera Din Panah, Beetal, Nachi and Kamori) was amplified by using reported ovine IL-2 primers. Amplified products of 4 breeds of goat were bidirectionally sequenced to decipher polymorphisms. Only a single substitution (T→A) was found in non-coding region of IL-2 gene. Comparison of IL-2 gene sequence of all four breeds with other goat breeds showed high similarity in sequence. Phylogenetic analysis of our local breeds with other mammals showed that IL-2 was highly variable. This high substitution rate could be due to changed selective pressure. These rapid changes may also lead to the changes in the functions of immune system.

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Pakistan Journal of Zoology


Pakistan J. Zool., Vol. 56, Iss. 4, pp. 1501-2000


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