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Raw or trimmed data set as input?

Open Silverfoxcome opened this issue 5 years ago • 3 comments

Hi! Sometime ago I ran NOVOPlasty using the whole raw dataset because I didn't have enough space to generate datasets with adapters trimmed. Now I have it, so I was wondering if I should ran again NOVOPlasty with the adapters removed like you say in the intructions:

DO NOT filter or quality trim the reads!!! Use the raw whole genome dataset (Only adapters should be removed)!

Thank you in advance for your help!

Silverfoxcome avatar Jun 25 '19 14:06 Silverfoxcome

Hi, usually not trimming causes no problem but if evey read has still adapters at the end its best to trim them. Is it assembly with 8 options? And am on holiday do couldn't look at those. With the 8 options you should first look at the orientation of the inverted repeat, so you can exclude some already https://github.com/ndierckx/NOVOPlasty/issues/79

ndierckx avatar Jun 25 '19 16:06 ndierckx

Hi! thanks for the quick answer!

I was mistaken and my sequences are already trimmed (the fastqc report shows no adapters or overrepresented sequences).

Please, can you tell me what tools could I use to look at the orientation of the inverted repeats? I'm pretty new to the field of bioinformatics.

I was using Mauve and I got this for the NOVOPlasty run when the output were 8 assemblies: https://cdn1.imggmi.com/uploads/2019/6/26/f14fd20744e00b98db50ae2e578089eb-full.jpg

and this when I changed the max_memory parameter to 20 instead of 15 (and I used the latest version of NOVOPlasty (3.3): https://cdn1.imggmi.com/uploads/2019/6/26/5bbd52d4b1d9d4582b568b6c1e1ee2c8-full.jpg

Silverfoxcome avatar Jun 25 '19 21:06 Silverfoxcome

Hi, just got back from holiday. Didn't you check the previous topic I added in the last comment? https://github.com/ndierckx/NOVOPlasty/issues/79

ndierckx avatar Jul 09 '19 17:07 ndierckx