Seqanswers Leaderboard Ad

Collapse

Announcement

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

  • BAM -> FASTQ why can I not produce the same result?

    Dear all, I've been trying to test if I can produce the same fusion call starting from BAM instead of FASQ. My STAR command is as such.

    HTML Code:
    STAR --genomeDir /index/hg38.p5/ \
    --readFilesIn T1_1.fq.gz T1_2.fq.gz \
    --readFilesCommand zcat --outFileNamePrefix T1 --outSAMtype BAM SortedByCoordinate --quantMode GeneCounts --sjdbGTFfile /index/hg38.gtf
    This is how the resulting BAM file looks like.

    HTML Code:
    samtools flagstat T1Aligned.sortedByCoord.out.bam
    
    121206267 + 0 in total (QC-passed reads + QC-failed reads)
    11756519 + 0 secondary
    0 + 0 supplementary
    0 + 0 duplicates
    121206267 + 0 mapped (100.00% : N/A)
    109449748 + 0 paired in sequencing
    54766664 + 0 read1
    54683084 + 0 read2
    109354332 + 0 properly paired (99.91% : N/A)
    109354332 + 0 with itself and mate mapped
    95416 + 0 singletons (0.09% : N/A)
    0 + 0 with mate mapped to a different chr
    0 + 0 with mate mapped to a different chr (mapQ>=5)
    However, I have tried a number of tools including the following.
    HTML Code:
    1. samtools sort -n --threads 4 ./T1Aligned.sortedByCoord.out.bam|samtools fastq -1 T1_R1_.fq -2 T1_R2_.fq -0 test.fq -
    I tried converting back to uBAM and doing it again.

    HTML Code:
    /picard-tools-2.2.4/picard.jar RevertSam I=T1Aligned.sortedByCoord.out.bam O=T1.ubam QUIET=true VALIDATION_STRINGENCY=SILENT
    
    /picard-tools-2.2.4/picard.jar SamToFastq INPUT=T1.ubam FASTQ=T1_R1_.fq SECOND_END_FASTQ=T2_R2_.fq VALIDATION_STRINGENCY=SILENT
    I also tried out this tutorial herehttps://gist.github.com/darencard/72...64ca512a04a6dd, but failed because of some read mismatch.

    I also tried bedtools bamtofastq but nothing works. When I input fastq vs what I can derive from BAM-> Fastq I'm not getting the same fusion output as I did previously. Anybody with suggestions? Thanks!

  • #2
    Cross-posted on Biostars

    Comment

    Latest Articles

    Collapse

    • seqadmin
      Recent Innovations in Spatial Biology
      by seqadmin


      Spatial biology is an exciting field that encompasses a wide range of techniques and technologies aimed at mapping the organization and interactions of various biomolecules in their native environments. As this area of research progresses, new tools and methodologies are being introduced, accompanied by efforts to establish benchmarking standards and drive technological innovation.

      3D Genomics
      While spatial biology often involves studying proteins and RNAs in their...
      Yesterday, 07:30 PM
    • seqadmin
      Advancing Precision Medicine for Rare Diseases in Children
      by seqadmin




      Many organizations study rare diseases, but few have a mission as impactful as Rady Children’s Institute for Genomic Medicine (RCIGM). “We are all about changing outcomes for children,” explained Dr. Stephen Kingsmore, President and CEO of the group. The institute’s initial goal was to provide rapid diagnoses for critically ill children and shorten their diagnostic odyssey, a term used to describe the long and arduous process it takes patients to obtain an accurate...
      12-16-2024, 07:57 AM

    ad_right_rmr

    Collapse

    News

    Collapse

    Topics Statistics Last Post
    Started by seqadmin, 12-30-2024, 01:35 PM
    0 responses
    21 views
    0 likes
    Last Post seqadmin  
    Started by seqadmin, 12-17-2024, 10:28 AM
    0 responses
    41 views
    0 likes
    Last Post seqadmin  
    Started by seqadmin, 12-13-2024, 08:24 AM
    0 responses
    55 views
    0 likes
    Last Post seqadmin  
    Started by seqadmin, 12-12-2024, 07:41 AM
    0 responses
    40 views
    0 likes
    Last Post seqadmin  
    Working...
    X