Journal
TRENDS IN PLANT SCIENCE
Volume 18, Issue 12, Pages 680-687Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2013.09.007
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Funding
- National Science Foundation [0936884, 1317114]
- Korean RDA [SSAC PJ009525]
- Deutsche Forschungsgemeinschaft [EXC 1028]
- Direct For Biological Sciences
- Division Of Environmental Biology [0936884, 1004213] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1317114] Funding Source: National Science Foundation
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Plastids fulfill a variety of different functions (e.g., photosynthesis and amino acid biosynthesis) that rely on proteins of cyanobacterial (i.e., endosymbiont), noncyanobacterial, and 'host' (eukaryotic) origins. Analysis of plastid proteome data from glaucophytes and green algae allows robust inference of protein origins and organelle protein sharing across the >1 billion years of Archaeplastida evolution. Here, we show that more than one-third of genes encoding plastid proteins lack detectable homologs in Cyanobacteria, underlining the taxonomically broad contributions to plastid functions. Chlamydiae and Proteobacteria are the most significant other bacterial sources of plastid proteins. Mapping of plastid-proteins to metabolic pathways shows a core set of anciently derived proteins in Archaeplastida, with many others being lineage specific and derived from independent horizontal gene transfer (HGT) events.
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