Conservation and Variability of Synaptonemal Complex Proteins in Phylogenesis of Eukaryotes

Figure 1

Phylogenetic tree of algae, fungi, mosses, and green plants based on proteins similar to Hop1/ASY1 in proteomes of these organisms found with the use of maximal scores. The initial set of proteins used to construct the fast minimum evolution tree included RefSeq: XP_002957345 (Volvox carteri, Chlorophyta); GenBank: CBN75586, annotated as Hop1 homolog (Ectocarpus siliculosus, Phaeophyceae); RefSeq: XP_002995702 (Nosema ceranae, Microsporidia); GenBank: EGF80506 (Batrachochytrium dendrobatidis, Chytridiomycota); RefSeq: NP_012193.1, SC protein Hop1 (Saccharomyces cerevisiae, Ascomycota); GenBank: GAA98305 (Mixia osmundae, Basidiomycota); RefSeq: XP_001760173 (Physcomitrella patens, Bryophyta); RefSeq: XP_002969766 (Selaginella moellendorffii, Lycopodiophyta); RefSeq: NP_564896.1, SC protein ASY1 (Arabidopsis thaliana, Euphyllophyta). The archaeal protein RefSeq: YP_003707339.1 (Methanococcus voltae, Archaea) was taken as control. Only species and higher taxa are indicated on the tree. Three proteins (from Archaea, Microsporidia, and Ascomycota) were automatically removed from the final version of the tree. The evolutionary distance between two sequences was modeled as expected fraction of amino acid substitutions per site given the fraction of mismatched amino acids in the aligned region (according to [43]).