title: Fast optimal genome tiling with applications to microarray design and homology search.
abstract: In this paper, we consider several variations of the following basic tiling problem: given a sequence of real numbers with two size-bound parameters, we want to find a set of tiles of maximum total weight such that each tiles satisfies the size bounds. A solution to this problem is important to a number of computational biology applications such as selecting genomic DNA fragments for PCR-based amplicon microarrays and performing homology searches with long sequence queries. Our goal is to design efficient algorithms with linear or near-linear time and space in the normal range of parameter values for these problems. For this purpose, we first discuss the solution to a basic online interval maximum problem via a sliding-window approach and show how to use this solution in a nontrivial manner for many of the tiling problems introduced. We also discuss NP-hardness results and approximation algorithms for generalizing our basic tiling problem to higher dimensions. Finally, computational results from applying our tiling algorithms to genomic sequences of five model eukaryotes are reported.
authors.affiliation: Department of Computer Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Piotr
authors.initials: P
authors.lastname: Berman
authors.forename: Paul
authors.initials: P
authors.lastname: Bertone
authors.forename: Bhaskar
authors.initials: B
authors.lastname: Dasgupta
authors.forename: Mark
authors.initials: M
authors.lastname: Gerstein
authors.forename: Ming-Yang
authors.initials: MY
authors.lastname: Kao
authors.forename: Michael
authors.initials: M
authors.lastname: Snyder
mesh_terms: D000465:Algorithms; D019295:Computational Biology; D004247:DNA / Q000235:genetics; D023281:Genomics / Q000706:statistics & numerical data*; D008433:Mathematics; D008957:Models, Genetic; D020411:Oligonucleotide Array Sequence Analysis / Q000706:statistics & numerical data*; D016415:Sequence Alignment / Q000706:statistics & numerical data*
chemical_list: D004247:DNA