کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
523943 | 868533 | 2011 | 18 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Parallelization of Nullspace Algorithm for the computation of metabolic pathways Parallelization of Nullspace Algorithm for the computation of metabolic pathways](/preview/png/523943.png)
Elementary mode analysis is a useful metabolic pathway analysis tool in understanding and analyzing cellular metabolism, since elementary modes can represent metabolic pathways with unique and minimal sets of enzyme-catalyzed reactions of a metabolic network under steady state conditions. However, computation of the elementary modes of a genome-scale metabolic network with 100–1000 reactions is very expensive and sometimes not feasible with the commonly used serial Nullspace Algorithm. In this work, we develop a distributed memory parallelization of the Nullspace Algorithm to handle efficiently the computation of the elementary modes of a large metabolic network. We give an implementation in C++ language with the support of MPI library functions for the parallel communication. Our proposed algorithm is accompanied with an analysis of the complexity and identification of major bottlenecks during computation of all possible pathways of a large metabolic network. The algorithm includes methods to achieve load balancing among the compute-nodes and specific communication patterns to reduce the communication overhead and improve efficiency.
► Scalable parallel computation of elementary flux modes in metabolic networks.
► Proposal and implementation of distributed memory parallel Nullspace Algorithm.
► Parallelization heuristic that attains good load balancing and scalability.
► Evaluation on E. coli and S. cerevisiae metabolic networks.
Journal: Parallel Computing - Volume 37, Issues 6–7, June–July 2011, Pages 261–278