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Tool(S) For Post-Velvet Microbial Sequence Assembly/Alignment

Hi,

I have a set of NGS sequences for Staph aureus which I've assembled using Velvet. The assembly is incomplete, and I now need to use comparison to reference sequences to make some sense of what I've generated. What tools prove particularly good for this? I'm pretty much a beginner at this so I look forward to all suggestions

thanks

m

velvet assembly
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updated by Nick Loman • Nick Loman • written by Mat • Mat

2 answers

As well as Mummer, I would definitely suggest checking out Mauve which is both a whole-genome aligner (can do multiple genomes) as well as a great alignment viewer.

http://asap.ahabs.wisc.edu/mauve/

• 3 views • link
written by Nick Loman • Nick Loman

thanks Nick; I picked up on Velvet use from your blog comments back in 2009; thanks for that - very useful. M

• 0 views • link
written by Mat • Mat

The best option for me is to use MUMmer. The inlcuded tools mapview and mummerplot will give you pretty good visualisation of your data.

With mummerplot:

alt text

Consequently, with a bit of extra computing work you can also use the output of MUMmer into CIRCOS to have a nice circular representation, like this one below. Believe me, biologists love this kind of representation !

alt text

Believe me, biologists love this kind of representation !

• 2 views • link
written by Pasta • Pasta

nice! thank you, I'll take a look. m

• 0 views • link
written by Mat • Mat

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