Fast index based algorithms and software for matching position specific scoring matrices
نویسندگان
چکیده
منابع مشابه
Fast Search Algorithms for Position Specific Scoring Matrices
Fast search algorithms for finding good instances of patterns given as position specific scoring matrices are developed, and some empirical results on their performance on DNA sequences are reported. The algorithms basically generalize the Aho–Corasick, filtration, and superalphabet techniques of string matching to the scoring matrix search. As compared to the naive search, our algorithms can b...
متن کاملPoSSuMsearch: Fast and Sensitive Matching of Position Specific Scoring Matrices using Enhanced Suffix Arrays
In biological sequence analysis, position specific scoring matrices (PSSMs) are widely used to represent sequence motifs. In this paper, we present a new nonheuristic algorithm, called ESAsearch, to efficiently find matches of such matrices in large databases. Our approach preprocesses the search space, e.g. a complete genome or a set of protein sequences, and builds an enhanced suffix array wh...
متن کاملProtein secondary structure prediction based on position-specific scoring matrices.
A two-stage neural network has been used to predict protein secondary structure based on the position specific scoring matrices generated by PSI-BLAST. Despite the simplicity and convenience of the approach used, the results are found to be superior to those produced by other methods, including the popular PHD method according to our own benchmarking results and the results from the recent Crit...
متن کاملUsing substitution probabilities to improve position-specific scoring matrices
Each column of amino acids in a multiple alignment of protein sequences can be represented as a vector of 20 amino acid counts. For alignment and searching applications, the count vector is an imperfect representation of a position, because the observed sequences are an incomplete sample of the full set of related sequences. One general solution to this problem is to model unobserved sequences ...
متن کاملLarge Scale Matching for Position Weight Matrices
This paper addresses the problem of multiple pattern matching for motifs encoded by Position Weight Matrices. We first present an algorithm that uses a multi-index table to preprocess the set of motifs, allowing a dramatically decrease of computation time. We then show how to take benefit from simlar motifs to prevent useless computations.
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ژورنال
عنوان ژورنال: BMC Bioinformatics
سال: 2006
ISSN: 1471-2105
DOI: 10.1186/1471-2105-7-389