Abstract
A 16 bp site of protein binding has been identified in the promoter of the 780 gene of T-DNA. Specific DNA-protein interactions were demonstrated between a double-stranded oligonucleotide containing this element (5′-TTGAAAAATCAACGCT-3′) and a protein isolated from nuclear extracts of cauliflower inflorescences. Specific bases required for this binding activity (780 binding protein; 780BP) were defined by kinetic competition studies with mutated oligonucleotides, methylation interference assays and DNAse I footprinting. 780BP binding was not competed with up to 1000-fold excess of previously characterized plant regulatory elements such as as-1, the LRE, and the ocs, G-box, and AT-rich elements. In addition, 780BP was shown to bind sequences overlapping a mammalian hormone receptor element with greater affinity than the 780 element.
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Adams, E.C., Gurley, W.B. Nuclear protein 780BP from cauliflower binds an element in the 780 gene promoter of T-DNA. Plant Mol Biol 26, 377–392 (1994). https://doi.org/10.1007/BF00039547
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DOI: https://doi.org/10.1007/BF00039547