Chimeric origins of ochrophytes and haptophytes revealed through an ancient plastid proteome - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue eLife Année : 2017

Chimeric origins of ochrophytes and haptophytes revealed through an ancient plastid proteome

Résumé

Plastids are supported by a wide range of proteins encoded within the nucleus and imported from the cytoplasm. These plastid-targeted proteins may originate from the endosymbiont, the host, or other sources entirely. Here, we identify and characterise 770 plastid-targeted proteins that are conserved across the ochrophytes, a major group of algae including diatoms, pelagophytes and kelps, that possess plastids derived from red algae. We show that the ancestral ochrophyte plastid proteome was an evolutionary chimera, with 25% of its phylogenetically tractable proteins deriving from green algae. We additionally show that functional mixing of host and plastid proteomes, such as through dual targeting, is an ancestral feature of plastid evolution. Finally, we detect a clear phylogenetic signal from one ochrophyte subgroup, the lineage containing pelagophytes and dictyochophytes, in plastid-targeted proteins from another major algal lineage, the haptophytes. This may represent a possible serial endosymbiosis event deep in eukaryotic evolutionary history.
Fichier principal
Vignette du fichier
e23717-download.pdf (20.41 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-01526828 , version 1 (23-05-2017)

Licence

Paternité

Identifiants

Citer

Richard G Dorrell, Gillian Gile, Giselle Mccallum, Raphaël Méheust, Eric P Bapteste, et al.. Chimeric origins of ochrophytes and haptophytes revealed through an ancient plastid proteome. eLife, 2017, 6, pp.e23717. ⟨10.7554/eLife.23717⟩. ⟨hal-01526828⟩
583 Consultations
242 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More