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United States Department of Agriculture

Agricultural Research Service

Title: Coel is a LTR retrotransopson-like element, in Beta vulgaris L., and contains a Tnp2-domain transposase gene

item Kuykendall, Larry
item Shao, Jonathan
item Trimmer, Kenneth

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:

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.

Last Modified: 07/21/2017
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