---
name: "Bio::Search::HSP::BlastPullHSP"
section: "3pm"
platform: "linux"
package: "libbio-perl-perl"
version: "1.7.8-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Bio::Search::HSP::BlastPullHSP"
---

# Bio::Search::HSP::BlastPullHSP(3pm)

A parser and HSP object for BlastN hsps

## NAME

Bio::Search::HSP::BlastPullHSP - A parser and HSP object for BlastN hsps

## SYNOPSIS

```
    # generally we use Bio::SearchIO to build these objects
    use Bio::SearchIO;
    my $in = Bio::SearchIO->new(-format => 'hmmer_pull',
                                                           -file   => 'result.blast');
    while (my $result = $in->next_result) {
                while (my $hit = $result->next_hit) {
                        print $hit->name, "\n";
                        print $hit->score, "\n";
                        print $hit->significance, "\n";
                        while (my $hsp = $hit->next_hsp) {
                                # process HSPI objects
                        }
                }
    }
```

## DESCRIPTION

This object implements a parser for BlastN hsp output.

## FEEDBACK

### Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to the Bioperl mailing list.  Your participation is much appreciated.

```
  bioperl-l@bioperl.org                  - General discussion
  http://bioperl.org/wiki/Mailing_lists  - About the mailing lists
```

### Support

Please direct usage questions or support issues to the mailing list:

*bioperl-l@bioperl.org*

rather than to the module maintainer directly. Many experienced and  reponsive experts will be able look at the problem and quickly  address it. Please include a thorough description of the problem  with code and data examples if at all possible.

### Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their resolution. Bug reports can be submitted via the web:

```
  https://github.com/bioperl/bioperl-live/issues
```

## AUTHOR - Sendu Bala

Email bix@sendu.me.uk

## APPENDIX

The rest of the documentation details each of the object methods. Internal methods are usually preceded with a \_

### new

```
 Title   : new
 Usage   : my $obj = Bio::Search::HSP::BlastNHSP->new();
 Function: Builds a new Bio::Search::HSP::BlastNHSP object.
 Returns : Bio::Search::HSP::BlastNHSP
 Args    : -chunk  => [Bio::Root::IO, $start, $end] (required if no -parent)
           -parent => Bio::PullParserI object (required if no -chunk)
           where the array ref provided to -chunk contains an IO object
           for a filehandle to something representing the raw data of the
           hsp, and $start and $end define the tell() position within the
           filehandle that the hsp data starts and ends (optional; defaults
           to start and end of the entire thing described by the filehandle)
```

### query

```
 Title   : query
 Usage   : my $query = $hsp->query
 Function: Returns a SeqFeature representing the query in the HSP
 Returns : L<Bio::SeqFeature::Similarity>
 Args    : none
```

### hit

```
 Title   : hit
 Usage   : my $hit = $hsp->hit
 Function: Returns a SeqFeature representing the hit in the HSP
 Returns : L<Bio::SeqFeature::Similarity>
 Args    : [optional] new value to set
```

### gaps

```
 Title    : gaps
 Usage    : my $gaps = $hsp->gaps( ['query'|'hit'|'total'] );
 Function : Get the number of gap characters in the query, hit, or total alignment.
 Returns  : Integer, number of gap characters or 0 if none
 Args     : 'query' = num conserved / length of query seq (without gaps)
            'hit'   = num conserved / length of hit seq (without gaps)
            'total' = num conserved / length of alignment (with gaps)
            default = 'total'
```

### strand

```
 Title   : strand
 Usage   : $hsp->strand('query')
 Function: Retrieves the strand for the HSP component requested
 Returns : +1 or -1 (0 if unknown)
 Args    : 'hit' or 'subject' or 'sbjct' to retrieve the strand of the subject
           'query' to retrieve the query strand (default)
           'list' or 'array' to retrieve both query and hit together
```

### start

```
 Title   : start
 Usage   : $hsp->start('query')
 Function: Retrieves the start for the HSP component requested
 Returns : integer, or list of two integers (query start and subject start) in
           list context
 Args    : 'hit' or 'subject' or 'sbjct' to retrieve the start of the subject
           'query' to retrieve the query start (default)
```

### end

```
 Title   : end
 Usage   : $hsp->end('query')
 Function: Retrieves the end for the HSP component requested
 Returns : integer, or list of two integers (query end and subject end) in
           list context
 Args    : 'hit' or 'subject' or 'sbjct' to retrieve the end of the subject
           'query' to retrieve the query end (default)
```

### pvalue

```
 Title   : pvalue
 Usage   : my $pvalue = $hsp->pvalue();
 Function: Returns the P-value for this HSP
 Returns : undef (Hmmpfam reports do not have p-values)
 Args    : none
```