title: Conservation of dual-targeted proteins in Arabidopsis and rice points to a similar pattern of gene-family evolution.
abstract: Gene duplication followed by acquisition of specific targeting information and dual targeting were evolutionary strategies enabling organelles to cope with overlapping functions. We examined the evolutionary trend of dual-targeted single-gene products in Arabidopsis and rice genomes. The number of paralogous proteins encoded by gene families and the dual-targeted orthologous proteins were analysed. The number of dual-targeted proteins and the corresponding gene-family sizes were similar in Arabidopsis and rice irrespective of genome sizes. We show that dual targeting of methionine aminopeptidase, monodehydroascorbate reductase, glutamyl-tRNA synthetase, and tyrosyl-tRNA synthetase was maintained despite occurrence of whole-genome duplications in Arabidopsis and rice as well as a polyploidization followed by a diploidization event (gene loss) in the latter.
authors.affiliation: Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Av. Pádua Dias, 11, C.P. 83, Piracicaba, SP, 13400-970, Brazil.
authors.forename: Carolina V
authors.initials: CV
authors.lastname: Morgante
authors.forename: Ricardo A O
authors.initials: RA
authors.lastname: Rodrigues
authors.forename: Phellippe A S
authors.initials: PA
authors.lastname: Marbach
authors.forename: Camila M
authors.initials: CM
authors.lastname: Borgonovi
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Moura
authors.forename: Marcio C
authors.initials: MC
authors.lastname: Silva-Filho
mesh_terms: D017360:Arabidopsis / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000235:genetics; D001483:Base Sequence; D017931:DNA Primers / Q000235:genetics; D018744:DNA, Plant / Q000235:genetics; D019143:Evolution, Molecular; D020440:Gene Duplication; D017343:Genes, Plant; D005810:Multigene Family; D012275:Oryza / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics; D030821:Plants, Genetically Modified; D013045:Species Specificity; D014026:Nicotiana / Q000235:genetics
chemical_list: D029681:Arabidopsis Proteins; D017931:DNA Primers; D018744:DNA, Plant; D010940:Plant Proteins