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- W2000782604 abstract "HAT3.1 is a member of the PHD-finger homeodomain protein family. The HAT3.1 homeodomain is highly divergent in sequence even at positions that are almost invariable among homeodomains. In this work, we have applied the random oligonucleotide selection technique to investigate if the HAT3.1 homeodomain is able to recognize specific DNA sequences. Analysis of the selected molecules followed by hydroxyl radical footprinting experiments and yeast one-hybrid assays indicated that HAT3.1 shows a preference for the sequence T(A/G)(A/C)ACCA, different from those bound by other homeodomains. Binding was dependent on homeodomain residues located at positions 47, 50, 51, and 54, the same positions that usually participate in DNA binding in most homeodomains. The study of the interaction of mutants at these positions with DNA carrying nucleotide changes at specific sites suggested that H51 and K50 most likely interact with nucleotides 2 to 4 and 5 to 6, respectively, while W54 would establish contacts with position 4. The presence of H51 and W54 represents an innovation among homeodomain structures. The fact that the HAT3.1 homeodomain is able to interact with specific DNA sequences is evidence of the inherent plasticity of the homeodomain as a DNA binding unit." @default.
- W2000782604 created "2016-06-24" @default.
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- W2000782604 date "2007-05-26" @default.
- W2000782604 modified "2023-10-17" @default.
- W2000782604 title "Interaction of the PHD-Finger Homeodomain Protein HAT3.1 from <i>Arabidopsis thaliana</i> with DNA. Specific DNA Binding by a Homeodomain with Histidine at Position 51" @default.
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- W2000782604 doi "https://doi.org/10.1021/bi602657e" @default.
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