MPIPairwiseStatSig: Parallel pairwise statistical significance estimation of local sequence alignment

Ankit Agrawal*, Sanchit Misra, Daniel Honbo, Alok Nidhi Choudhary

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

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 languageEnglish (US)
Title of host publicationHPDC 2010 - Proceedings of the 19th ACM International Symposium on High Performance Distributed Computing
Pages470-476
Number of pages7
DOIs
StatePublished - Dec 16 2010
Event19th ACM International Symposium on High Performance Distributed Computing, HPDC 2010 - Chicago, IL, United States
Duration: Jun 21 2010Jun 25 2010

Other

Other19th ACM International Symposium on High Performance Distributed Computing, HPDC 2010
Country/TerritoryUnited States
CityChicago, IL
Period6/21/106/25/10

Keywords

  • Experimentation

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Software

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