Peroxiredoxins (Prxs) are a newly defined family of antioxidant proteins that have been implicated, via their antioxidant activity, in a number of cellular functions, including cell proliferation and differentiation, protection of other proteins from oxidative damage, and intracellular signaling. We isolated genomic DNA sequences of the type II Prx ( Prx II ) gene from the mouse and analyzed their molecular genetic characteristics. In the mouse, the Prx II is found to form a small multigene family with three members. One of them, the Prx II-1 gene, is actively transcribed in a variety of adult tissues as well as in the developing embryos to produce a 1.1-kb mRNA. The Prx II-1 gene consists of six exons and five introns, and the whole transcription unit occupies about 4.5 kb in the mouse genome. The other two genes, Prx II-2 and Prx II-3 , are encoded by single exons, and show 97.5 and 87% of nucleotide sequence homology with the Prx II-1 gene, respectively. Structural features of these genes and the results of RT-PCR analysis on RNAs from various tissue sources indicate that the Prx II-2 and Prx II-3 genes could be pseudogenes derived from the Prx II-1 gene by a mechanism involving retrotransposition. These results strongly suggest that only the Prx II-1 gene might be relevant for studying the function of the Prx II gene in the murine system.
Gene – Elsevier
Published: Aug 17, 1998
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