[BioC] How to perform annotation using refseq IDs and GO ?

James W. MacDonald jmacdon at med.umich.edu
Thu Feb 28 15:46:40 CET 2008

Hi Stanley,

Ng Stanley wrote:
> Hi,
> Given a list of refseq IDs obtained from a microarray, what packages and
> steps are needed to perform analysis using the Gene Ontology ?

I am assuming here that you are not talking about an Affy array? If you 
are, the easiest thing to do would be to use GOstats and the 
corresponding annotation package for that chip.

If we are not talking about an Affy chip, ideally one would still be 
able to use GOstats and one of the org.Xx.eg.db packages, but I don't 
know if any functionality for such an approach exists at this time.

You could also use topGO using one of the org.Xx.eg.db packages 
(assuming that the species you are using is one of the six for which an 
org.Xx.eg.db package exists).

You might also consider a GSEA approach using the Category package.

As Georg Otto mentioned, you might also consider annotating your data 
using biomaRt, but this approach will not work for GOstats. It will work 
for topGO, and might work for Category, although I am not 100% sure 
about that one.

All of these packages have vignettes that you can read to help you get 



> If this question has been tackled before, will be grateful if resource to
> the solution be pointed.
> Thanks
> Stanley
> 	[[alternative HTML version deleted]]
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James W. MacDonald, M.S.
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109

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