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Fast alignment and comparison of RNA structures

by: Tim Wiegels, Stefan Bienert, Andrew E. Torda
Bioinformatics, Vol. 29, No. 5. (1 March 2013), pp. 588-596, doi:10.1093/bioinformatics/btt006  Key: citeulike:12077602

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Abstract

Motivation: To recognize remote relationships between RNA molecules, one must be able to align structures without regard to sequence similarity. We have implemented a method, which is swift [O(n2)], sensitive and tolerant of large gaps and insertions. Molecules are broken into overlapping fragments, which are characterized by their memberships in a probabilistic classification based on local geometry and H-bonding descriptors. This leads to a probabilistic similarity measure that is used in a conventional dynamic programming method.Results: Examples are given of database searching, the detection of structural similarities, which would not be found using sequence based methods, and comparisons with a previously published approach.Availability and implementation: Source code (C and perl) and binaries for linux are freely available at www.zbh.uni-hamburg.de/fries.Contact: tim.wiegels@gmail.com


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