Catalog of Sm and Lsm genes in 6 eukaryotes from super-groups of Excavates, Chromoalveolates, and Amoebozoa.

Genes were annotated by their homology to the eukaryotes from animals, fungi and plants (see Text S1).
Genes were labeled as regular (Sm/Lsm) if they were identified as such in the NCBI database. Genes were labeled as possible (Sm/Lsm) if they were not annotated as such in the database entries, but annotation could be transferred from known genes used as a query in the PSI-BLAST search. In most cases the search yielded homologs with reliable P-value (<10−15). However in some cases of eukaryotes (Dictyostelium discoideum, Plasmodium falciparum, Trypanosoma brucei, Entamoeba histolytica, Guillardia theta, Giardia lamblia, and Encephalitozoon cuniculi) the homologs were quite remote, however after a second iteration of PSI-BLAST the P-values were in the range of 10−4–10−12. Such cases of annotation transfer should be used with caution. Some genes are absent as indicated by an empty entry.