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- W2147277839 abstract "It becomes more and more important to search for similar structures from molecular 3-D structure databases in the structural biology of the post genomic era. Two molecules are said to be similar if the RMSD (root mean square deviation) of the two molecules is less than or equal to some given constant bound. In this paper, we consider an important, fundamental problem of finding all the similar substructures from 3-D structure databases of chain molecules (such as proteins), with consideration of indels (i.e., insertions and deletions). The problem has been believed to be very difficult, but its computational difficulty has not been well known. In this paper, we first show that the same problem in arbitrary dimension is NP-hard. Moreover, we also propose a new algorithm that dramatically improves the average-case time complexity for the problem, in case the number of indels k is bounded by some constant. Our algorithm solves the above problem in average O(N) time, while the time complexity of the best known algorithm was O(Nmk+1), for a query of size m and a database of size N." @default.
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- W2147277839 date "2009-01-01" @default.
- W2147277839 modified "2023-10-01" @default.
- W2147277839 title "Linear-Time Protein 3-D Structure Searching with Insertions and Deletions" @default.
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- W2147277839 doi "https://doi.org/10.1007/978-3-642-04241-6_26" @default.
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