Abstract
A certain nucleotide sequence in the promoter region of Vicia faba rRNA genes that specifically binds to a nuclear protein fraction has been identified by using a gel retardation assay and DNase I footprinting technique. The binding site of this protein fraction is located about 60 bp upstream from the initiation site of the pre-rRNA transcript. This location does not correspond with previously reported results on maize rRNA genes. However, both of the binding sites share a bi-partite consensus sequence, TAT-G(N)xCAGG. Methylation interference experiments show that two G residues in TATG and the complementary strand of CAGG are important for specific DNA-protein interaction. Furthermore, competition analyses using point-mutated synthetic DNAs show that two G residues in CAGG are essential for this interaction. Similar sequences are found in promoter regions of other plant and animal rRNA genes. We suggest that these sequences may be a cis-control element commonly involved in rRNA transcription.
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Nakajima, T., Suzuki, A., Tanifuji, S. et al. Characterization of nucleotide sequences that interact with a nuclear protein fraction in rRNA gene of Vicia faba . Plant Mol Biol 20, 939–949 (1992). https://doi.org/10.1007/BF00027164
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DOI: https://doi.org/10.1007/BF00027164