A new approach to the design of a sequence with the highest affinity for a molecular surface |
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Authors: | Reva, B.A. Finkelstein, A.V. |
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Affiliation: | Institute of Mathematical Problems of Biology (Research Computer Center) 142292, Pushchino, Moscow region, Russia 1Institute of Protein Research, Russian Academy of Sciences 142292. Pushchino, Moscow region, Russia |
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Abstract: | We describe an algorithm to design the primary structures forpeptides which must have the strongest binding to a given molecularsurface. This problem cannot be solved by a direct combinatorialsorting, because of an enormous number of possible primary andspatial structures. The approach to solve this problem is todescribe a state of each residue by two variables: (i) aminoacid type and (ii) 3-D coordinate, and to minimize binding energyover all these variables simultaneously. For short chains whichhave no long-range interactions within themselves, this minimizationcan be done easily and efficiently by dynamic programming. Wealso discuss the problem of how to estimate specificity of bindingand how to deduce a sequence with maximal specificity for agiven surface. We show that this sequence can be deduced bythe same algorithm after some modification of energetic parameters. |
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Keywords: | drug design/ dynamic programming/ specificity of binding/ surface binding |
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