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  and on  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.
Diévart et al. BMC Evolutionary Biology 2011 11:367 doi:10.1186/1471-2148-11-367