GO Enrichment for non model orlganisms

Question

[ira]

I have bunch of gene ids from Streptomyces clavuligerus

BB341_01025
BB341_01200
BB341_01285
BB341_01420
BB341_01425
BB341_02985

I am using blastn to retrieve protein sequences. Is there some way to get GO enrichment for the genes without using blast2go which is a proprietary software.

Thanks

[Martombo]

You can use Blast2GO for this kind of analysis. Also, I believe similar questions have been asked before here on biostars, make sure to check that.