Assessing the bacterial contribution to the plastid proteome

Qiu, Huan; Price, Dana C.; Weber, Andreas P.M.; Facchinelli, Fabio; Yoon, Hwan Su; Bhattacharya, Debashish

doi:10.1016/j.tplants.2013.09.007

Cited by 55 publications

(54 citation statements)

References 78 publications

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“…Moreover, 7 trees were insufficiently sampled to allow any interpretation, and in 18 other trees the topology was compatible with a HGT but the closest sister group to Archaeplastida was not Chlamydiae but other bacterial groups. This later observation is in accordance with previous estimations of the composition of the protein repertoire of plastids [33][34][35]. Fig.…”

Section: Ménage à Troissupporting

confidence: 93%

“…To have a more precise view on the H/EGT that specifically contributed to Archaeplastida genomes, an interesting yet limited strategy is to apply the same survey procedures to plastid proteomes (excluding plastid-encoded proteins). This analysis, conducted several times independently, led to comparable results where cyanobacteria were the main contributors to plastid proteomes, followed by proteobacteria and Chlamydiae, as well as many other bacterial phyla [33][34][35]. While we start to understand how EGT from the cyanobiont have physically happened [36], it is still difficult to determine the chronology of their (probably continuous) occurrence in the interval between the engulfment of the cyanobiont and the diversification of Archaeplastida.…”

Section: Genome Mosaicism In Archaeplastidamentioning

confidence: 98%

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Primary endosymbiosis: have cyanobacteria and Chlamydiae ever been roommates?

Deschamps

2014

Acta Soc Bot Pol

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Eukaryotes acquired the ability to process photosynthesis by engulfing a cyanobacterium and transforming it into a genuine organelle called the plastid. This event, named primary endosymbiosis, occurred once more than a billion years ago, and allowed the emergence of the Archaeplastida, a monophyletic supergroup comprising the green algae and plants, the red algae and the glaucophytes. Of the other known cases of symbiosis between cyanobacteria and eukaryotes, none has achieved a comparable level of cell integration nor reached the same evolutionary and ecological success than primary endosymbiosis did. Reasons for this unique accomplishment are still unknown and difficult to comprehend. The exploration of plant genomes has revealed a considerable amount of genes closely related to homologs of Chlamydiae bacteria, and probably acquired by horizontal gene transfer. Several studies have proposed that these transferred genes, which are mostly involved in the functioning of the plastid, may have helped the settlement of primary endosymbiosis. Some of these studies propose that Chlamydiae and cyanobacterial symbionts coexisted in the eukaryotic host of the primary endosymbiosis, and that Chlamydiae provided solutions for the metabolic symbiosis between the cyanobacterium and the host, ensuring the success of primary endosymbiosis. In this review, I present a reevaluation of the contribution of Chlamydiae genes to the genome of Archaeplastida and discuss the strengths and weaknesses of this tripartite model for primary endosymbiosis.

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Section: Ménage à Troissupporting

confidence: 93%

Section: Genome Mosaicism In Archaeplastidamentioning

confidence: 98%

Primary endosymbiosis: have cyanobacteria and Chlamydiae ever been roommates?

Deschamps

2014

Acta Soc Bot Pol

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“…These putative common enzyme recruitments (or replacements) suggest that the common ancestor of the Archaeplastida enlisted proteins for plastid functions before the diversification of the three descendant lineages. Detailed phylogenetic surveys suggest that several of these proteins are products of genes acquired by the eukaryote host from diverse bacterial sources via HGT [30,31,91,92].…”

Section: Phylogenomics Of Cyanophora Paradoxamentioning

confidence: 99%

The Glaucophyta: the blue-green plants in a nutshell

2015

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The Glaucophyta is one of the three major lineages of photosynthetic eukaryotes, together with viridiplants and red algae, united in the presumed monophyletic supergroup Archaeplastida. Glaucophytes constitute a key algal lineage to investigate both the origin of primary plastids and the evolution of algae and plants. Glaucophyte plastids possess exceptional characteristics retained from their cyanobacterial ancestor: phycobilisome antennas, a vestigial peptidoglycan wall, and carboxysome-like bodies. These latter two traits are unique among the Archaeplastida and have been suggested as evidence that the glaucophytes diverged earliest during the diversification of this supergroup. Our knowledge of glaucophytes is limited compared to viridiplants and red algae, and this has restricted our capacity to untangle the early evolution of the Archaeplastida. However, in recent years novel genomic and functional data are increasing our understanding of glaucophyte biology. Diverse comparative studies using information from the nuclear genome of Cyanophora paradoxa and recent transcriptomic data from other glaucophyte species provide support for the common origin of Archaeplastida. Molecular and ultrastructural studies have revealed previously unrecognized diversity in the genera Cyanophora and Glaucocystis. Overall, a series of recent findings are modifying our perspective of glaucophyte diversity and providing fresh approaches to investigate the basic biology of this rare algal group in detail.

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“…Therefore, hundreds of plastid proteins encoded in the nuclear genome have to be imported into the photosynthetic organelle via the TOC/TIC machinery (Keegstra and Cline, 1999;Leister, 2003) (Figure 1A). Remarkably, only between 600 and 1700 of the plastid-localized proteins are of cyanobacterial provenance (Price et al, 2012;Dagan et al, 2013), and a considerable proportion of the organelle protein collection has been recruited from the host repertoire and diverse bacterial sources during plastid evolution (Suzuki and Miyagishima, 2010;Qiu et al, 2013;Schönknecht et al, 2014).…”

Section: The Plastid Proteome Is a Phylogenetic Mosaicmentioning

confidence: 99%

The basic genetic toolkit to move in with your photosynthetic partner

Reyes‐Prieto

2015

Front. Ecol. Evol.

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The origin of photosynthetic organelles via endosymbiosis more than 1 Gya ago was a major detonator of eukaryotic diversification. The evolution of a stable endosymbiotic relationship between eukaryotic cells and photosynthetic cyanobacteria involved series of cellular and molecular processes that are not entirely understood. Critical steps toward the evolution of plastids occurred when the host cell gained genetic and metabolic control over the captured cyanobacterium. Proteins recruited from the host repertoire had major roles initiating the metabolite exchange between both symbiotic partners. Concurrently, the relocation of certain cyanobacterial genes into the host nuclear genome was critical to coordinate the division of the endosymbiotic cells and the transit of nuclear-encoded proteins into the novel organelle. This review explores diverse studies that have identified key "endosymbiosis genes" and discusses the putative roles of the encoded proteins during the early evolution of plastids. The understanding of the regulation mechanisms and functions of the "endosymbiosis genes" will shed light on the design of genetic engineering approaches to facilitate endosymbiotic associations.

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Assessing the bacterial contribution to the plastid proteome

Cited by 55 publications

References 78 publications

Primary endosymbiosis: have cyanobacteria and Chlamydiae ever been roommates?

Primary endosymbiosis: have cyanobacteria and Chlamydiae ever been roommates?

The Glaucophyta: the blue-green plants in a nutshell

The basic genetic toolkit to move in with your photosynthetic partner

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