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Articles

Dynamics of arginase gene evolution in metazoans

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Pages 407-418 | Received 26 Nov 2011, Accepted 27 Feb 2012, Published online: 12 Jun 2012
 

Abstract

In the present study, a comprehensive analysis of the arginase gene family in metazoans was performed. A total of 126 arginase genes have been identified in 44 species. Phylogenetic analyses indicate that arginase genes consist of four groups. Conservative and divergent gene structures are found among the groups. The syntenies also exist in distantly related genomes among multiple species. Adaptive evolution shows that, while purifying selection may have been the main force driving the evolution of the arginases, some of critical sites responsible for the functional divergence may have been under positive selection. Overall, the data obtained from our investigation contribute to a better understanding of the complexity of the arginase gene family and of the function and evolution of this family in metazoans.

Acknowledgements

This project is supported by grants from the National Science Foundation of China (No. 31100923) and Jiangsu University Senior Personnel Research Grants (10JDG027) to JC.

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