Question: rna seq read cleaning
gravatar for rahul.sg98
10 weeks ago by
rahul.sg980 wrote:

Please suggest me a tool for removing bacterial contamination from RNA seq reads before assembly.

rna-seq alignment • 145 views
ADD COMMENTlink modified 9 weeks ago by luca.marisaldi30 • written 10 weeks ago by rahul.sg980
gravatar for Mo Heydarian
10 weeks ago by
Mo Heydarian690
United States
Mo Heydarian690 wrote:

Hello, Can you provide some more information on what data you would like to remove bacterial reads from and what your desired outcome is? This will help in answering your question.

Look forward to hearing from you again!

Thanks for using Galaxy!

Cheers, Mo Heydarian

ADD COMMENTlink written 10 weeks ago by Mo Heydarian690

Hi, Thank you very much for your kind response. Actually, I have downloaded pair end RNA seq reads for assembly. reads were cleaned by trimmomatics: - adapter cleaning,q20, max read length 30bp. Assembled by Trinity with Group pairs distance- 500 bp,path reinforcement:- 50bp,min legth-200bp, assembled sequences were used for cap3 :- overlap 40bp, 90% identity. Then used for cegma and busco. But my completeness score for both cegma and busco is not coming more than 78% after repeated optimisation. Some people suggested me bacterial read cleaning, but don't know what tool to use and whether will it be available on the galaxy.

ADD REPLYlink written 10 weeks ago by rahul.sg980
gravatar for luca.marisaldi
9 weeks ago by
luca.marisaldi30 wrote:


Did you check the quality of the reads before and after Trimmomatic cleaning/filtering ?

FastQC is an excellent option and as far as I know you can have a first check towards this kind of (supposed?) contamination by checking the section "Overrepresented sequences". Eventually you can quickly blast these sequences in order to get some clues.

Maybe this can be of some help,


ADD COMMENTlink written 9 weeks ago by luca.marisaldi30
Please log in to add an answer.


Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
Powered by Biostar version 16.09
Traffic: 90 users visited in the last hour