[Bioperl-l] About Bio::DB::GenBank!

[Jonathan Manning]

I just encountered the same error. It looks like both Bio::DB::GenBank 
and Bio::DB::GenPept search the protein database. So, Bio::DB::GenBank 
is not returning anything when you query for an accession.

To verify this, change:
my $gb = new Bio::DB::GenBank;
to:
my $gb = new Bio::DB::GenBank(-format => 'fasta',
				-verbose => 1);

For me, this prints:
url is 
http://www.ncbi.nih.gov/entrez/eutils/efetch.fcgi?rettype=fasta&db=protein&id=AC068609&tool=bioperl&retmode=text&usehistory=n

Sure enough, visiting this gives me a blank page. However, if I 
substitute 'db=nucleotide' for 'db=protein' in that url, it works.

This bug seems to exist in 1.2 and 1.2.1, but I think is fixed in 1.2.2. 
(at least in the CVS head I checked...)

Either upgrade to 1.2.2 or edit Bio/DB/GenBank.pm and change 'protein' 
to 'nucleotide' in the BEGIN block.

~Jonathan


yaofx wrote:

> Hello,
> 
> I have installed Perl 5.6.1 for WIN32, and Bioperl  version 1.2.1.
> The following is the script ,which can retrieve data from GenBank by 
> sequences' gi,
> but can not get the results by accession number.
> I  replace "get_Stream_by_id"  with ""get_Stream_by_acc", also failed.
> 
> The error message is :
> 
> ------------- EXCEPTION  -------------
> MSG: WebDBSeqI Error - check query sequences!
> 
> STACK Bio::DB::WebDBSeqI::get_seq_stream 
> c:/Perl/site/lib/Bio/DB/WebDBSeqI.pm:46
> 4
> STACK Bio::DB::WebDBSeqI::get_Stream_by_id 
> c:/Perl/site/lib/Bio/DB/WebDBSeqI.pm:
> 259
> STACK toplevel web_gi2seq_vi.pl:50
> 
> --------------------------------------
> 
> BTW, I don't change any code about Bioperl package.
> What's matter with it? and how will i do next?
> 
> Thanks in advance for any kind of help
> 
> Fengxia
> 
> 
> #!/usr/bin/perl
> 
> $idlist = $ARGV[0];
> 
> if (@ARGV != 1){
>    print "USAGE: perl web_id2seq.pl <ID list file>\n";
>    exit(1);
> }
> 
> $faoutfile = $idlist."_fa.txt";
> (unlink $faoutfile) if (-e $faoutfile);
> 
> open (INPUT,$idlist);
> 
> while ($line = <INPUT>){
>    chomp ($line);
>    $line =~ s/\r//;
>    push (@querylist,$line);
> }
> $list = join ",", at querylist;
> close INPUT;
> 
> use Bio::SeqIO;
> use Bio::DB::GenBank;
> my $gb = new Bio::DB::GenBank;
> 
> my $seqout = new Bio::SeqIO(-file => ">$faoutfile", -format => 'fasta');
> my $seqio = $gb->get_Stream_by_id([$list]);
> 
> while($seq = $seqio->next_seq ) {
>        $seqout->write_seq($seq);
> }
> 
> 
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-- 
Jonathan Manning <jmanning at genome.wi.mit.edu>
Whitehead Institute Center for Genome Research
Finishing Process Analyst / Data Analyst