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Identification of a Chimeric Transcript formed by Intergenic Splicing of UbiE2 and Yghl1-4 in Mouse

Author Affiliations

  • 1Laboratory of Molecular Physiology, Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Ehime, JAPAN

Int. Res. J. Biological Sci., Volume 3, Issue (3), Pages 52-59, March,10 (2014)

Abstract

We identified a chimeric transcript UbiE2-Yghl1-4, formed by an intergenic splicing event between UbiE2 and Yghl1-4 present in tandem position on the mouse chromosome 15F1 at a distance of ~3kb. The UbiE2 is S-adenosylmethionine-dependent methyltransferase domain containing protein encoding gene, also known as mettl7a2. The Yghl1-4 is a member of YGH1/HIG1 gene family in mouse with YGHL/HIG1 exon 3 domain. The chimeric transcript is formed with exon 1 of UbiE2 fused to exons 2-4 of Yghl1-4 using the canonical splice sites from both genes. The UbiE2-Yghl1-4 is not a product of in vitro artifacts and our results showed independent expression of the parent and the chimeric transcripts. The expression of UbiE2, Yghl1-4 and UbiE2-Yghl1-4 were found exclusive to kidney only. Further, tissue localization by Non-Radioactive In Situ Hybridization (NRISH) indicated restricted expression in the epithelium of proximal tubules and adrenal cortex. The UbiE2-Yghl1-4 gene formation was found only in mouse and not in human. The characteristics of the UbiE2-Yghl1-4 chimeric transcript being specific to mouse genome and containing both the methyl transferase domain and the YGHL/HIG1 exon 3 domain appears to have functional implications in mouse and especially in the kidney, rather than merely generating genetic diversity.

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