Loss of the rpl32 gene from the chloroplast genome and subsequent acquisition of a preexisting transit peptide within the nuclear gene in Populus

摘要: Gene transfer events from organelle genomes (mitochondria and chloroplasts in plants) to the nuclear genome are important processes evolution of eukaryotic cell. It is highly likely that gene event still an ongoing process higher plant mitochondria chloroplasts. The number order genes encoded chloroplast plants conserved. Recently, several exceptional cases loss have been discovered as complete sequences has increased. Populus lost rpl32 gene, while corresponding (cp rpl32) identified genome. Nuclear transferred need gain a sequence encodes transit peptide. Here, we revealed cp acquired exon sequence, which homologous peptide derived Cu-Zn superoxide dismutase sod-1) gene. not only for peptide, but also conserved N-terminal portion mature SOD protein sod-1 suggesting occurrence DNA duplication. Unlike SOD-1, RPL32 did show biased localization This difference may be caused by mutations accumulated domain on We provide new insight into fate inherent