## Abstract

Sequence comparison is considered as a cornerstone application in bioinformatics, which forms the basis of many other applications. In particular, pairwise sequence alignment is a fundamental step in numerous sequence comparison based applications, where the typical purpose of pairwise sequence alignment step is homology detection, i.e., identifying related sequences. Estimation of statistical significance of a pairwise sequence alignment is crucial in homology detection. A recent development in the field is the use of pairwise statistical significance as an alternative to database statistical significance. Although pairwise statistical significance has been shown to be potentially superior than database statistical significance for homology detection (evaluated in terms of retrieval accuracy), currently it is much time consuming since it involves generating an empirical score distribution by aligning one sequence of the sequence-pair with N random shuffles of the other sequence. In this paper, we present a parallel algorithm for pairwise statistical significance estimation, called MPIPairwiseStatSig, implemented in C using MPI. Distributing the most compute-intensive portions of the pairwise statistical significance estimation procedure across multiple processors has been shown to result in near-linear speed-ups for the application.

Original language | English (US) |
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Title of host publication | HPDC 2010 - Proceedings of the 19th ACM International Symposium on High Performance Distributed Computing |

Pages | 470-476 |

Number of pages | 7 |

DOIs | |

State | Published - Dec 16 2010 |

Event | 19th ACM International Symposium on High Performance Distributed Computing, HPDC 2010 - Chicago, IL, United States Duration: Jun 21 2010 → Jun 25 2010 |

### Other

Other | 19th ACM International Symposium on High Performance Distributed Computing, HPDC 2010 |
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Country/Territory | United States |

City | Chicago, IL |

Period | 6/21/10 → 6/25/10 |

## Keywords

- Experimentation

## ASJC Scopus subject areas

- Computational Theory and Mathematics
- Computer Science Applications
- Software