Figure 1

Features and number of LRR-containing receptors in the analyzed genomes. (A) Schematic representation of LRR-RLK (land plants) and LRR-RK (other genomes) receptors. Each of these proteins contains a signal peptide (SP, empty box), 1 to 30 LRRs (black boxes) in their extracellular domain (ECD), a transmembrane domain (TM, dark gray box) and an intracytoplasmic kinase domain (KD, pale gray box). (B) Schematic phylogenetic representation of all of the genomes analyzed. The tree is based on [34] and on [35] for the green algae lineage. The number of genomes in which LRR-RKs or LRR-RLKs (land plants) were found is followed in parentheses by the total number of genomes analyzed for each kingdom. On the right, the number of LRR-RLKs or LRR-RKs is given following the name of each species. Among the green algae, 6 genomes were studied; only one (Chlorella variabilis NC64A) contains LRR-RK proteins. Among the oomycetes, 1 genome of Saprolegniales (Saprolegnia parasitica) and 4 genomes of Peronosporales (Pythium ultimum, Phytophthora infestans, Phytophthora ramorum and Phytophthora sojae) were analyzed. Only proteins with an LRR-TM-KD organization are considered to be LRR-RKs. ¹Soanes et al. 2010, ²Cock et al. 2010, ³this study, N.D. Not Determined.