---------- Forwarded message ----------
From: Jennifer Jackson
Hello,
The tools TopHat/Cufflinks will map and assemble transcripts from sequencing reads. This mapping give each component (short read, transcript, gene boundary) genomic coordinates with respect to the target reference genome.
Annotation is also mapped to the reference genome by genomic coordinates. This can be derived from different sources, a look at a genome browser project that focuses on annotation will help you to understand the concept. Good choices can be found under the Galaxy tool group "Get Data".
One way to merge the two (assign "annotation" to a "sequence/transcript/gene"), is to identify overlapping coordinate regions on the reference genome between the two. Please see the tools in the group "Operate on Genomic Intervals" and the associated wiki for help/choices http://wiki.g2.bx.psu.edu/Learn/Interval%20Operations. Galaxy is a good resource for this type of analysis.
Another way to obtain annotation is to run annotation algorithms directly on the sequence data itself. This is a large and varied analysis space. The public main Galaxy server has some tools for this type of analysis and more are offered if you decided to run a local/cloud instance with repositories from the Tool Shed.
http://getgalaxy.org
http://wiki.g2.bx.psu.edu/Tool%20Shed
For annotation, it is best to know what you are looking for, perform some searches both within the web tools you prefer and with a search tool such as Galaxy, use that research to determine the best platform to use the tool, then sort out the technical details. For general technical 'how-to-use' help with Galaxy, plus some basic scientific operations, these are good places to get oriented/started:
http://wiki.g2.bx.psu.edu/Learn
https://main.g2.bx.psu.edu/u/james/p/exercises
Best,
Jen
Galaxy team
On 4/3/12 7:30 AM, hsharm wrote:
>
> Dear galaxy users,
> This might be a very basic question to most of you. But I was hopimg I
> could get better understanding of this concept by asking you all.
> How exactly can we accomplish annotation of our reads? The combination
> of Tophat and cufflinks does annotate genes right? . I am a bit confused
> regarding this topic. Any help will be much appreciated.
> Thanks.
___________________________________________________________
The Galaxy User list should be used for the discussion of
Galaxy analysis and other features on the public server
at usegalaxy.org. Please keep all replies on the list by
using "reply all" in your mail client. For discussion of
local Galaxy instances and the Galaxy source code, please
use the Galaxy Development list:
http://lists.bx.psu.edu/listinfo/galaxy-dev
To manage your subscriptions to this and other Galaxy lists,
please use the interface at:
http://lists.bx.psu.edu/
No comments:
Post a Comment