Submitted to: International Journal of Plant Genomics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/18/2008
Publication Date: 9/15/2008
Citation: Kuykendall, L.D., Shao, J.Y., Trimmer, K.A. 2008. Coel is a LTR retrotransopson-like element, in Beta vulgaris L., and contains a Tnp2-domain transposase gene. International Journal of Plant Genomics. Available: http://dx.doi.org/10.1155/2008/360874. Interpretive Summary: Diseases caused by pathogenic microorganisms currently reduce both profitability and sustainability of sugar beet production in North America and on other continents. DNA sequence analyses were performed on a part of the sugar beet’s hereditary material termed “chromosomal DNA,” specifically controlling disease resistance. Results showed that a disease resistance-controlling region contains a number of genes, less than 25% of which are critically important plant genes called “core.” Some of the “extra” DNA found in this region could fine tune the expression of core genes and a new DNA element called Coe1, discovered to have a combination of traits heretofore unheard of, will be of interest and usefulness to plant genomics researchers working to improve the efficiency and profitability of crop production.
Technical Abstract: We describe herein the discovery of Coe1, a LTR retrotransposon-like element in Beta vulgaris, that carries a Tnp2-type transposase gene, Tbv1, and is flanked by the 8-mer sequence motif CACTATAA in or near inverted repeats. The Tbv1 transposase gene within Coe1 consists of eight exons, and the predicted the Tnp2-domain transposase gene product produced BLAST alignments with En/Spm type transposons. In addition to the Tnp2-domain transposase, Coe1 has two other ORFs: one evidently a retroviral-like gene and the other appears to be an Rvt2-domain integrase pseudogene.