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Phylogenetic analyses of plastid-originated proteins imply universal endosymbiosis in ancestors of animals and fungi.

Authors
  • Yuan, Shu
  • Guo, Jian-Hua
  • Du, Jun-Bo
  • Lin, Hong-Hui
Type
Published Article
Journal
Zeitschrift für Naturforschung. C, Journal of biosciences
Publication Date
Jan 01, 2008
Volume
63
Issue
11-12
Pages
903–908
Identifiers
PMID: 19227843
Source
Medline
License
Unknown

Abstract

We searched and analyzed cyanobacteria-originated metazoa/fungi proteins (COPs) by phylogenetic analyses. Analysis of them showed that for millions of years universal plastid endosymbiosis and gene transfer occurred in ancestors of metazoa/fungi, and some transferred fragments have been reserved until now even in modern mammals. Most eukaryotes contained plastids in the ancient era, and some of them lost them later. Functions of homologues in cyanobacterial genomes and eukaryotic genomes are in consensus, and most are involved in the organic compound metabolism. With emergence of organelles and subcellular structure in eukaryotic cells, the locations of these proteins diversified. Furthermore, some novel functions were endowed for COPs, especially in vertebrates.

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