Issue No. 05 - Sept.-Oct. (2012 vol. 9)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TCBB.2012.87
Tatsuya Akutsu , Inst. for Chem. Res., Kyoto Univ., Kyoto, Japan
Sven Kosub , Dept. of Comput. & Inf. Sci., Univ. of Konstanz, Konstanz, Germany
Avraham A. Melkman , Dept. of Comput. Sci., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Takeyuki Tamura , Inst. for Chem. Res., Kyoto Univ., Kyoto, Japan
In this paper, we study the problem of finding a periodic attractor of a Boolean network (BN), which arises in computational systems biology and is known to be NP-hard. Since a general case is quite hard to solve, we consider special but biologically important subclasses of BNs. For finding an attractor of period 2 of a BN consisting of n OR functions of positive literals, we present a polynomial time algorithm. For finding an attractor of period 2 of a BN consisting of n AND/OR functions of literals, we present an O(1.985n) time algorithm. For finding an attractor of a fixed period of a BN consisting of n nested canalyzing functions and having constant treewidth w, we present an O(n2p(w+1)poly(n)) time algorithm.
polynomials, biology computing, Boolean functions, genetic algorithms, time algorithm, periodic attractor, Boolean network, computational systems biology, positive literals, polynomial time algorithm, AND-OR functions, nested canalyzing functions, constant treewidth, Boolean functions, Computational systems biology, Polynomials, treewidth., Boolean network, periodic attractor, SAT, nested canalyzing function