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Treefam To Asign Gene Families

I have got about 1000 de novo predicted genes and would like to assign them to families using the TreeFam Database. On http://www.treefam.org/ you can search the database by entering the protein sequence. Is there any way to upload a file with the sequences and retrieve the homologs and the gene family assigned for each of these?

Thanks in advance for any input,

Diana

gene database denovo

1 answer

You can actually download all the HMM profiles of treefam and use them to scan your proteins. You can either use HMMER or their own treefam_scan script. The latter has extensive documentation and is easier to use, I guess.

If you are not comfortable using command-line/unix, then you can try OrthoMCL. But unlike TreeFam, it is BLAST based.

yes, links in the scripts requires api's to be installed.

One more question. What cutoffs are usually set for asigning the family? Alignment length and e value. And also, how are the single copy orthologous families defined? Thank you for the help.

Diana

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