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Fractal Geometry Study of DNA Binding Proteins

✍ Scribed by Jun Xu; Yang Chao; Runsheng Chen


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
492 KB
Volume
171
Category
Article
ISSN
0022-5193

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✦ Synopsis


The main aim of this paper is to search for three-dimensional structure homology between DNAbinding proteins. The run of a protein's main chain is depicted by a sequence, which is constituted by the fractal indices, where each index describes how twisted or extended a partial protein segment is. Two proteins are compared by constructing a dot matrix between two such sequences, and the matrix is searched for dot-concentrated rectangles which is an indication of tertiary homology. This new method is applied to DNA-binding proteins which are selected from Brookhaven Protein Data Bank, among which most contain a helix-turn-helix motif. The dot-matrix shows that there is tertiary homology between two motifs. Other interesting results are also presented in this paper.


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