title: Phylogenomic analysis of the receptor-like proteins of rice and Arabidopsis.
abstract: The tomato (Lycopersicon esculentum) Cf-9 resistance gene encodes the first characterized member of the plant receptor-like protein (RLP) family. Other RLPs such as CLAVATA2 and TOO MANY MOUTHS are known to regulate development. The domain structure of RLPs consists of extracellular leucine-rich repeats, a transmembrane helix, and a short cytoplasmic region. Here, we identify 90 RLPs in rice (Oryza sativa) and compare them with functionally characterized RLPs from different plant species and with 56 Arabidopsis (Arabidopsis thaliana) RLPs, including the downy mildew resistance protein RPP27. Many RLPs cluster into four distinct superclades, three of which include RLPs known to be involved in plant defense. Sequence comparisons reveal diagnostic amino acid residues that may specify different molecular functions in different RLP subtypes. This analysis of rice RLPs thus identified at least 73 candidate resistance genes and four genes potentially involved in development. Due to the synteny between rice and other Gramineae, this analysis should provide valuable tools for experimental studies in rice and other cereals.
authors.affiliation: Department of Molecular and Cell Biology , University of California, Berkeley, California 94720, USA.
authors.forename: Lillian K
authors.initials: LK
authors.lastname: Fritz-Laylin
authors.forename: Nandini
authors.initials: N
authors.lastname: Krishnamurthy
authors.forename: Mahmut
authors.initials: M
authors.lastname: Tör
authors.forename: Kimmen V
authors.initials: KV
authors.lastname: Sjölander
authors.forename: Jonathan D G
authors.initials: JD
authors.lastname: Jones
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000737:chemistry / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000737:chemistry / Q000235:genetics; D017124:Conserved Sequence; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018745:Genome, Plant; D008969:Molecular Sequence Data; D012275:Oryza / Q000737:chemistry / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics*; D011956:Receptors, Cell Surface / Q000737:chemistry / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D029681:Arabidopsis Proteins; D010940:Plant Proteins; D011956:Receptors, Cell Surface