Abstract
The transient expression of the luciferase reporter gene was used to detect the tissue-specific enhancer activity of the solitary extraviral long terminal repeat (LTR) of the human endogenous retrovirus K (HERV-K). The LTR was previously mapped to the 19q13.2 locus. It contains a number of potential regulatory elements including TATA box, binding sites for some nuclear factors, and a polyadenylation signal. However, an analysis of the genomic sequences close to the LTR did not reveal any known genes or the expressed sequences (EST), whose functioning could be regulated by this LTR. The enhancer activity can be preserved in the solitary LTR due to its involvement in the long-range control of genome functioning or by the absence of functional disruptive mutations within the human-specific LTR, because it is of a relatively young evolutionary age.
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Domansky, A.N., Akopov, S.B., Lebedev, Y.B. et al. Enhancer Activity of Solitary Long Terminal Repeat of Human Endogenous Retrovirus K. Russian Journal of Bioorganic Chemistry 28, 308–311 (2002). https://doi.org/10.1023/A:1019543808495
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DOI: https://doi.org/10.1023/A:1019543808495