Question: Long read alignment for MEGAN6
gravatar for MAPK
8 days ago by
United States
MAPK1.2k wrote:

I am trying to use MEGAN6. I have assembled transcriptome data that I want to align with nr database. What options do I have for long read alignments (beside LAST) that I can then import to MEGAN6?

ADD COMMENTlink modified 8 days ago by buchfink80 • written 8 days ago by MAPK1.2k
gravatar for buchfink
8 days ago by
buchfink80 wrote:

You can use DIAMOND ( for long read alignment. It now also supports frameshift alignments. Use the options -F 15 --range-culling.

ADD COMMENTlink written 8 days ago by buchfink80

Thanks buchnfink. Assuming you are the author of diamond, let me ask you a few questions- I used Last to align assembled reads with uniprot database. I then used 'sort-maf-last' script and then blast2rma script to get rma6 file (size=470mb). When I view that output rma6 on Megan, it only shows two nodes. What could be reason for that? So, does DIAMOND also support long read alignment? Based on this web, I thought I can not use DIAMOND for LR.

ADD REPLYlink modified 8 days ago • written 8 days ago by MAPK1.2k

Regarding your first question, I can't help you with that, please ask at the MEGAN community website (

DIAMOND does support long read alignment now, it has recently been implemented.

ADD REPLYlink written 5 days ago by buchfink80
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