Hi,

I'm trying to do pathway analysis for DE porcine genes generated using DESeq2. 

(A) I used package "clusterprofiler" to convert gene symbols to enterzids using the following code:

gg = bitr(m1, fromType="SYMBOL", toType="ENTREZID", OrgDb="org.Ss.eg.db")

geneSS <- as.vector(gg$ENTREZID)

(B) Then I implemented 'enrichPathway' function to obtain enriched pathways. The following is the code I used, but it failed to generate the enriched pathways. 

rpa <- enrichPathway(gene=geneSS, pvalueCutoff=0.05, readable=T, organism="pig")

head(as.data.frame(rpa))

[1] ID          Description GeneRatio   BgRatio     pvalue      p.adjust   

[7] qvalue      Count      

<0 rows> (or 0-length row.names)

I was able to get a list of KEGG pathways using "erichKEGG". But, I couldn't do the same with ReactomePA. Can anyone help solve this? Thanks in advance.