Fig 1.
Phylogeny of selected arthropod species.
Schematic evolutionary tree of selected fully sequenced arthropods. Insect species are coloured in orange, crustacean in green, acari in blue, and myriapod in pink.
Table 1.
Number of sequences and domains (in brackets) for every peptidase inhibitor family in selected arthropod species.
Fig 2.
Total peptidase inhibitors in the selected arthropod species.
(A) Total numbers of inhibitory protein sequences and inhibitory domains. (B) Dispersion graph showing the linear trend of the two variables (number of domains and number of sequences). The coefficient of determination (R2) is included. (C) Dispersion graph showing the linear trends of the two variables (number of sequences/domains and number of genes). The coefficients of determination (R2) are included.
Fig 3.
Phylogenetic distribution and divergence rates in peptidase inhibitory families without species-specific clades.
Schematic PhyML phylogenetic trees using the inhibitory domains from the selected arthropod species are depicted. Coloured triangles show collapsed branches. Triangle size is proportional to the number of nodes (domains) included. The number of species with any domain in the collapsed branch is indicated. aLRT values over 50 are shown. LRT Theta values for Type I functional divergence between numbered clades are included. Complete phylograms are shown in S3 Fig.
Fig 4.
Phylogenetic distribution and divergence rates in peptidase inhibitory families with species-specific clades.
Schematic PhyML phylogenetic trees using the inhibitory domains from the selected arthropod species are depicted. Coloured triangles show collapsed branches. Triangle size is proportional to the number of nodes (domains) included. The number of species with any domain in the collapsed branch is indicated. Numbers after species abbreviation indicate the number of inhibitory domains in the collapsed branch. aLRT values over 50 are shown. LRT Theta values for Type I functional divergence between clades formed by species-specific expansions are included. Dm, Drosophila melanogaster; Ag, Anopheles gambiae; Bm, Bombyx mori; Tc, Tribolium castaneum; Nv, Nasonia vitripennis; Rp, Rhodnius prolixus; Ap, Acyrthosiphon pisum; Dp, Daphnia pulex; Is, Ixodes scapularis; Tu, Tetranychus urticae; Sm, Strigamia maritima. Complete phylograms are shown in S3 Fig.
Fig 5.
Phylogenetic distribution and divergence rates in peptidase inhibitory families with species-rich clades.
Schematic PhyML phylogenetic trees using the inhibitory domains from the selected arthropod species are depicted. Coloured triangles show collapsed branches. Triangle size is proportional to the number of nodes (domains) included. The number of species with any domain in the collapsed branch is indicated. Numbers after species abbreviation indicate the number of inhibitory domains in the branch. In parentheses the number of inhibitory domains in a species-rich clade. aLRT values over 50 are shown. LRT Theta values for Type I functional divergence between numbered clades are included. Dm, Drosophila melanogaster; Cf, Camponotus floridanus; Ap, Acyrthosiphon pisum; Dp, Daphnia pulex; Tu, Tetranychus urticae; Sm, Strigamia maritima. Complete phylograms are shown in S3 Fig.