Published online 17 December 2004
Nucleic Acids Research, Vol. 32 No. 22 © Oxford University Press 2004; all rights reserved
Articles |
Efficient computation of optimal oligoRNA binding
Physics Department, Williams College, Williamstown, MA 01267, USA
* To whom correspondence should be addressed. Tel: +1 413 597 3520; Fax: +1 413 597 4116; Email: aalberts{at}williams.edu
Received August 11, 2004; Revised October 2, 2004; Accepted November 30, 2004
We present an algorithm that calculates the optimal binding conformation and free energy of two RNA molecules, one or both oligomeric. This algorithm has applications to modeling DNA microarrays, RNA splice-site recognitions and other antisense problems. Although other recent algorithms perform the same calculation in time proportional to the sum of the lengths cubed,
((N1 + N2)3), our oligomer binding algorithm, called BINDIGO, scales as the product of the sequence lengths,
(N1·N2). The algorithm performs well in practice with the aid of a heuristic for large asymmetric loops. To demonstrate its speed and utility, we use BINDIGO to investigate the binding proclivities of U1 snRNA to mRNA donor splice sites.
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