Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • mcbaindesu
    Junior Member
    • May 2013
    • 2

    #1

    One result per line for blastp?

    Hi all,

    I am trying to annotate a long list of orfs by blasting the translated aa sequences against a local uniprot_sprot database. I am using the blast+ version of blastp.

    I want at least one line per query sequence with output format 6. In some cases it is not possible to get a single result line per query (sometimes you get multiple HSPs returned even when using -max_target_seqs 1). But I have found solutions to that problem. (You need to remove extra lines using sort -u, there is a thread about it here: http://seqanswers.com/forums/archive...p/t-27735.html)

    The problem is that if there is no significant hit, no result is returned for that particular query sequence, so the output file is missing some lines. Is there a way to force blastp to give me a result per line?? 'No significant similarity' in the sseqid column would be suitable for example.

    (Basically I am trying to make it as easy as possible to add annotation columns to my tab-delimited file of ORFs)
  • rhinoceros
    Senior Member
    • Apr 2013
    • 372

    #2
    I'm not sure, but maybe -outfmt 7 (tabular with comment lines) reports also non-hits..
    savetherhino.org

    Comment

    • mcbaindesu
      Junior Member
      • May 2013
      • 2

      #3
      Thanks for the reply, I think you are correct, -outfmt 7 will probably give a result with comment lines for queries without hits.

      It would still need post-processing to incorporate it into my database and I think the -outfmt6 files will be easier for a novice like me to process.

      Basically either way I need to learn the basic unix text processing tools! (it will be better for me in the long run to do that rather than keep on using vlookup in excel! )

      Here are some realted threads:
      Discussion of next-gen sequencing related bioinformatics: resources, algorithms, open source efforts, etc

      Discussion of next-gen sequencing related bioinformatics: resources, algorithms, open source efforts, etc

      Comment

      Latest Articles

      Collapse

      • SEQadmin2
        Multiomic Liquid Biopsy: What DNA/RNA Panels Reveal That DNA Alone Can’t
        by SEQadmin2



        Tumors contain complex mixtures of cell populations that evolve in response to treatment and host-specific factors. Tissue biopsies provide only static snapshots of a tumor’s state. But what if we could follow that evolution over time using a minimally invasive technique?

        Liquid biopsies can detect tumor-derived material circulating in the bloodstream, providing a way to study treatment response, detect emerging resistance, and discover new biomarkers. Circulating
        ...
        10-14-2026, 09:55 AM
      • SEQadmin2
        New Genomics Technologies Take Aim at Long-Standing Limits
        by SEQadmin2


        Researchers using sequencing and genomics tools often have to make trade-offs. They can choose between speed or scale, short reads or long-range information, or targeted panels or a view of the whole transcriptome. New technologies that have been released this year are built to address those tough choices.

        We asked six companies the same four questions to learn about their latest products. The new technologies bring a lot to the table, including rethinking sequencing
        ...
        09-28-2026, 10:25 AM

      ad_right_rmr

      Collapse

      News

      Collapse

      Topics Statistics Last Post
      Started by SEQadmin2, 10-15-2026, 10:52 AM
      0 responses
      16 views
      0 reactions
      Last Post SEQadmin2  
      Started by SEQadmin2, 10-14-2026, 05:39 AM
      0 responses
      21 views
      0 reactions
      Last Post SEQadmin2  
      Started by SEQadmin2, 10-13-2026, 09:56 AM
      0 responses
      21 views
      0 reactions
      Last Post SEQadmin2  
      Started by SEQadmin2, 10-09-2026, 11:14 AM
      0 responses
      27 views
      0 reactions
      Last Post SEQadmin2  
      Working...