Abstract
Eukaryotic gene expression is dependent on short protein-binding DNA sequence motifs promoting the assembly of multiprotein transcription complexes. Human retroposons of the Alu family are known to contain some high-affinity binding sites for transcription factors, which may serve as signals in regulation of expression of RNA-polymerase II-transcribed genes. In this computer study we have compared the density of ten consensus transcription factor binding sites in a set of human mature mRNA, human promotors and Alu repeats. Our results indicate that Alu retroposons and promotor sequences have significantly higher mean density of these sites compared to RNAs. It is suggested that the majority of Alu repeats do have the potential for regulating gene expression via modulation of RNA polymerase II-dependent transcription.
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