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Table 2 Highly represented protein functions in Tardigrades (COGs and KOGs).

From: Tardigrade workbench: comparing stress-related proteins, sequence-similar and functional protein clusters as well as RNA elements in tardigrades

Information from COG clusters1:
Information storage and processing
75 Translation elongation factor EF-1 (COG5256)
64 GTPases - translation elongation (COG0050)
58 Peptide chain release factor RF-3 (COG4108)
Cellular processes and signaling
31 Ubiquitin (COG5272)
25 Membrane GTPase LepA (COG0481)
21 Cysteine protease (COG4870)
Metabolism
75 Heme/copper-type cytochrome/quinol oxidases (COG0843)
67 GTPases - Sulfate adenylate transferase (COG2895)
Poorly characterized
11 Dehydrogenases with different specificities (COG1028)
11 Uncharacterized homolog of Blt101 (COG0401)
Information from KOG clusters1:
Information storage and processing
77 Translation elongation factor EF-1 (KOG0052)
71 Polypeptide release factor 3 (KOG0459)
70 Elongation factor 1 alpha (KOG0458)
53 Mitochondrial translation elongation factor Tu (KOG0460)
Cellular processes and signaling
52 Glutathione S-transferase (KOG1695)
46 Cysteine proteinase Cathepsin L (KOG1543)
34 Apolipoprotein D/Lipocalin (KOG4824)
31 Cysteine proteinase Cathepsin F (KOG1542)
Metabolism
78 Cytochrome c oxidase (KOG4769)
74 Fatty acid-binding protein FABP (KOG4015)
Poorly characterized
31 Ubiquitin and ubiquitin-like proteins (KOG0001)
16 GTPase Rab18, small G protein superfamily (KOG0080)
15 Ras-related GTPase (KOG0394)
15 GTPase Rab21, small G protein superfamily (KOG0088)
  1. 1 Detailed data and all COG/KOG numbers are given on the WEB page http://waterbear.bioapps.biozentrum.uni-wuerzburg.de/cgi-bin/cog_stat.pl. Summarized here are the functions of those clusters of orthologous groups (COGs) occurring particularly often or suggesting tardigrade specific adaptations.