Paulinella chromatophora - rethinking the transition from endosymbiont to organelle

• Autorzy: Nowack E. C. M.
• Języki publikacji: EN

Abstrakty

EN

Eukaryotes co-opted photosynthetic carbon fixation from prokaryotes by engulfing a cyanobacterium and stably integrating it as a photosynthetic organelle (plastid) in a process known as primary endosymbiosis. The sheer complexity of interactions between a plastid and the surrounding cell that started to evolve over 1 billion years ago, make it challenging to reconstruct intermediate steps in organelle evolution by studying extant plastids. Recently, the photosynthetic amoeba Paulinella chromatophora was identified as a much sought-after intermediate stage in the evolution of a photosynthetic organelle. This article reviews the current knowledge on this unique organism. In particular it describes how the interplay of reductive genome evolution, gene transfers, and trafficking of host-encoded proteins into the cyanobacterial endosymbiont contributed to transform the symbiont into a nascent photosynthetic organelle. Together with recent results from various other endosymbiotic associations a picture emerges that lets the targeting of host-encoded proteins into bacterial endosymbionts appear as an early step in the establishment of an endosymbiotic relationship that enables the host to gain control over the endosymbiont.

Słowa kluczowe

EN

Paulinella chromatophora; organellogenesis; plastid; evolution; endosymbiosis; Cyanoprokaryota; photosynthesis; chromatophore; protein targeting; endosymbiont; organelle; Rhizaria

• Wydawca: -
• Czasopismo: Acta Societatis Botanicorum Poloniae
• Rocznik: 2014
• Tom: 83
• Numer: 4
• Opis fizyczny: p.387-397,fig.,ref.

Twórcy

autor

Nowack E. C. M.

• Department of Biology, Heinrich-Heine-Universiat Dusseldorf, Universitatsstrasse 1, 40225 Dusseldorf, Germany

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Identyfikatory

DOI

10.5586/asbp.2014.049