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Table 5 Protease complements in Ich and other model organisms

From: Comparative genomics of the pathogenic ciliate Ichthyophthirius multifiliis, its free-living relatives and a host species provide insights into adoption of a parasitic lifestyle and prospects for disease control

  Catalytic class   Percentage of the
Organism Aspartic Cysteine Metallo Serine Threonine Total proteomea
Ichthyophthirius multifiliis 14 (5.5%) 81 (31.9%) 119 (46.9) 25 (9.9%) 15 (5.9%) 254 3.1
Paramecium tetraurelia 48 (8.3%) 225 (38.9%) 168 (29.1%) 95 (16.4%) 42 (7.3%) 578 1.5
Tetrahymena thermophila b 43 (9.0%) 211 (44.0%) 139 (28.9%) 73 (15.2%) 14 (2.9%) 480 1.7
Plasmodium falciparum 17 (10.5%) 33 (34.7%) 21 (22.1%) 16 (16.9%) 15 (15.8%) 95 1.8
Neurospora crassa 19 (8.1%) 41 (17.4%) 81 (34.5%) 75 (31.9%) 19 (8.1%) 235 2.4
Saccharomyces cerevisiae 19 (11.1%) 41 (24.0%) 57 (33.3%) 38 (22.2%) 16 (9.4%) 171 2.4
Caenorhabditis elegans 27 (5.6%) 125 (25.9%) 190 (39.4%) 115 (23.9%) 25 (5.2%) 482 2.4
Drosophila melanogaster 46 (6.2%) 86 (11.5%) 207 (27.7%) 373 (49.9%) 35 (4.7%) 747 5.4
Homo sapiens 320 (29.3%) 190 (17.4%) 252 (23.0%) 291 (26.6%) 41 (3.7%) 1,094 4.5
Arabidopsis thaliana 233 (27.6%) 162 (19.2%) 112 (13.3%) 306 (36.2%) 31(3.7%) 849 3.1
  1. Values in parentheses are the percentage of the individual catalytic class in the protease complement. aThe percentage of the whole genome that encodes putative proteases. bThe distributions of T. thermophila and P. falciparum are based on Eisen et al. [11] and Wu et al. [60], respectively. The distributions of the other model organisms are based on the results published in Merops database.