IMR Press / FBE / Volume 2 / Issue 4 / DOI: 10.2741/E193

Frontiers in Bioscience-Elite (FBE) is published by IMR Press from Volume 13 Issue 2 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with Frontiers in Bioscience.

Evolution of peroxisome proliferator-activated receptor gamma alternative splicing
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1 Department of Microbiology, School of Life Sciences, Fudan University, Shanghai 200433, People’s Republic of China
2 Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, People’s Republic of China
3 State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200433, People’s Republic of China
4 Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center at Shanghai, Shanghai 201203, People’s Republic of China
Front. Biosci. (Elite Ed) 2010, 2(4), 1334–1343;
Published: 1 June 2010

Peroxisome proliferator-activated receptor gamma (PPAR gamma) plays an important role in the control of energy balance and lipid and glucose homeostasis. Different transcript variants were investigated not only in human but also in other vertebrates. To look into the evolutionary changes of these variants, we analyzed the genomic sequences of PPAR gamma genes from several vertebrate species, as well as their mRNA and EST data. Several potential alternative splicing exons at the 5'-end of the PPAR gamma gene were identified. The 5'-end of the PPAR gamma gene is discovered to be evolutionarily active and recruits new exons via different strategies. Moreover, it is shown that the only coding alternative exon (exon B) processes much higher Ka/Ks compared with its constitutive counterparts. In addition, its Ka/Ks is greater than 1 in the rat, mouse, and rabbit, indicating adaptive evolution and possible energy storage related gain-of-function for the exon.

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