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Directional shape complementarity at the protein-DNA interface.J Mol Recognit, Vol. 16, No. 4. (g 2003), pp. 213-222.
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AbstractNature utilizes various styles of architecture for DNA-binding proteins to recognize diverse DNA sequences, a process facilitated by a complementary surface between protein and DNA. However, the extent and ways this 'shape complementarity' occurs at the protein-DNA interface have yet to be characterized. Here, by analyzing a set of diverse protein-DNA complexes of known three-dimensional structures, we investigated whether the normal vectors of a protein surface at the interface exhibited any relationship with DNA conformation. Generally, the normal vectors of a DNA-contacting protein surface distinctly preferred certain angles, enabling them to align with certain axes characterizing the conformation of DNA. Thus, a new geometric property of DNA-binding protein is demonstrated, i.e. the "shape complementarity" of protein-DNA recognition clearly bears the property of "directionality".
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