Seqanswers Leaderboard Ad

Collapse

Announcement

Collapse
No announcement yet.
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • PacBio CCS read denovo assambly failed

    Hello!
    I'm beginning to the field of bioinformatics (I'm 1st year student in bioinformatics and systems biology program) and I got uncorrected PacBio sequences from Xylaria sp. consist of 64 files are bax.h5, CCS reads, filtered_subreads and filtered_subreads_longest which I assembled by using celera assembler and I found error in overlap based trimming step (runCA -p xylaria-trim -d xylaria-trim -s xylaria-trim.spec xylaria-untrimmed.frg; I created Spec file followed by sample in this link http://wgs-assembler.sourceforge.net...ds,_with_CA8.2). So, the errors shown as follows


    ERROR: Failed with signal HUP (1)
    ================================================================================

    runCA failed.

    ----------------------------------------
    Stack trace:

    at wgs-8.3rc1/Linux-amd64/bin/runCA line 1649
    main::caFailure('gatekeeper failed', '/storage/home/phongphak.kho/xylaria-trim/xylaria-trim.gkpStor...') called at wgs-8.3rc1/Linux-amd64/bin/runCA line 1978
    main:reoverlap('/storage/home/phongphak.kho/pacbio/xylaria-untrimmed.frg') called at wgs-8.3rc1/Linux-amd64/bin/runCA line 6551

    ----------------------------------------
    Last few lines of the relevant log file (/storage/home/phongphak.kho/xylaria-trim/xylaria-trim.gkpStore.err):


    Starting file '/storage/home/phongphak.kho/pacbio/xylaria-untrimmed.frg'.

    Processing SINGLE-ENDED SANGER QV encoding reads from:
    '/storage/home/phongphak.kho/pacbio/Pacbio.RunÚyH¥n·æ±-þ0}-©ÚºÎò¹¬ç¬.ccs.fastq.zip'
    FASTQ quality name line too long in read 'ºíûqY¼*ئ& m¾w˲.:~¨©½u^ÇT
    vÖ5Ý0÷$ò¬ªíoÓ<L
    ¥WþÁ°ú^©uZÚÉ«æ>
    g T7¶í0uù½Ì
    2Ü7rÛ²


    PS. forFRG file, I used CCS reads, filtered_subreads and filtered_subreads_longest to created

  • #2
    Looks like an issue with the fastq file, any insight into why all the special characters are in the file name? Also I don't think CA will work from a 'zip' format fastq file.
    Recreate the frg file, checking that the fastq is in normal unix text format.

    Out of interest why are you including the CCS reads in the assembly? The filtered_subreads.fasta file is all you need for denovo assembly:
    http://wgs-assembler.sourceforge.net...o_RS_sequences

    Comment

    Latest Articles

    Collapse

    • seqadmin
      Current Approaches to Protein Sequencing
      by seqadmin


      Proteins are often described as the workhorses of the cell, and identifying their sequences is key to understanding their role in biological processes and disease. Currently, the most common technique used to determine protein sequences is mass spectrometry. While still a valuable tool, mass spectrometry faces several limitations and requires a highly experienced scientist familiar with the equipment to operate it. Additionally, other proteomic methods, like affinity assays, are constrained...
      04-04-2024, 04:25 PM
    • seqadmin
      Strategies for Sequencing Challenging Samples
      by seqadmin


      Despite advancements in sequencing platforms and related sample preparation technologies, certain sample types continue to present significant challenges that can compromise sequencing results. Pedro Echave, Senior Manager of the Global Business Segment at Revvity, explained that the success of a sequencing experiment ultimately depends on the amount and integrity of the nucleic acid template (RNA or DNA) obtained from a sample. “The better the quality of the nucleic acid isolated...
      03-22-2024, 06:39 AM

    ad_right_rmr

    Collapse

    News

    Collapse

    Topics Statistics Last Post
    Started by seqadmin, 04-11-2024, 12:08 PM
    0 responses
    22 views
    0 likes
    Last Post seqadmin  
    Started by seqadmin, 04-10-2024, 10:19 PM
    0 responses
    24 views
    0 likes
    Last Post seqadmin  
    Started by seqadmin, 04-10-2024, 09:21 AM
    0 responses
    20 views
    0 likes
    Last Post seqadmin  
    Started by seqadmin, 04-04-2024, 09:00 AM
    0 responses
    52 views
    0 likes
    Last Post seqadmin  
    Working...
    X