BioPerl Ketan Mane SLIS, IU. BioPerl Perl and now BioPerl -- Why ??? Availability Advantages for Bioinformatics.

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Presentation transcript:

BioPerl Ketan Mane SLIS, IU

BioPerl Perl and now BioPerl -- Why ??? Availability Advantages for Bioinformatics

BioPerl Perl – Scripting language –Powerful text parser –Includes set of regular expression & matching tools –Good string manipulation tool –Portable to web using CGI scripts

BioPerl BioPerl = Bio + Perl –Mainly object-oriented approach –Bioinformatics specific perl-modules available Sequence Manipulation Compatibility towards different database & formats Parse results from molecular biology programs

BioPerl Main url source: – –Includes information on: Projects. Tutorials. …. Tons of other related information –Bioperl releases are also mirrored by the Comprehensive Perl Archive Network (CPAN)....

BioPerl Directory Structure BioPerl Bio/ BioPerl modules Examples/ Includes simple helpful scripts Doc/ "How To" files and the FAQ as XML Scripts/ BioPerl reusable scripts Contributed/ Contributed scripts not necessarily integrated into BioPerl t/ Perl built-in tests data/ Data files used for the tests

BioPerl Sequence Manipulation –Module  Bio::SeqIO –Input = Sequence, File-format (eg: FASTA) –Sample program for file format conversion: use Bio::SeqIO; $in = Bio::SeqIO->new(-file => "inputfilename", -format => 'Fasta'); $out = Bio::SeqIO->new(-file => ">outputfilename", -format => 'EMBL'); while ( my $seq = $in->next_seq() ) { $out->write_seq($seq); }

BioPerl Sequence Manipulation: To acquire basic sequence statistics – –molecular weights –residue –codon frequencies Modules -SeqStats -SeqWord

BioPerl Database Access: –Supports sequence data retrieval from different databases: Genbank, RefSeq, Swissprot, EMBL etc.. –Sample program $gb = new Bio::DB::GenBank(); $seq1 = $gb->get_Seq_by_id('MUSIGHBA1'); $seq2 = $gb->get_Seq_by_acc('AF303112');

BioPerl Sequence Similarity Operations: –Availability of Sequence Alignment Programs Local alignment program: Smith Waterman Module : Bio::Tools::pSW Sample Code: $factory = new Bio::Tools::pSW( '-matrix' => 'BLOSUM62', '-gap' => 12, '-ext' => 2);

BioPerl Parse information from mol. biology programs –Eg: Blast –Remote execution of BLAST programs with RemoteBlast.pm bioperl module –From blast report, the parse able information includes hit count, best local sequence and their scores and other … –SearchIO.pm – robust module, so preferred over Search.pm

BioPerl Thanks !!!