Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote

@article{Schnknecht2013GeneTF,
  title={Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote},
  author={Gerald Sch{\"o}nknecht and Wei-Hua Chen and Chad M. Ternes and G. Barbier and Roshan Prakash Shrestha and Mario Stanke and Andrea Br{\"a}utigam and Brett J. Baker and Jillian F. Banfield and R. Michael Garavito and Kevin M. Carr and Curtis G. Wilkerson and Stefan Andreas Rensing and David Gagneul and Nicholas E Dickenson and Christine Oesterhelt and Martin J. Lercher and Andreas P. M. Weber},
  journal={Science},
  year={2013},
  volume={339},
  pages={1207 - 1210}
}
Hot, Toxic Eukaryote Unusually, the single-celled eukaryote red alga, Galdieria sulphuraria, can thrive in hot, acidic springs. This organism is endowed with extraordinary metabolic talents and can consume a variety of strange carbohydrates, as well as turn on photosynthesis when the food runs out. Schönknecht et al. (p. 1207; see the Perspective by Rocha) discerned from phylogenetic analysis of its genome that during its evolution, G. sulphuraria appears to have commandeered at least 75… 

Comparisons between Complete Genomes of the Eukaryotic Extremophile Galdieria sulphuraria Reveals Complex Nuclear Chromosomal Structures

Comparative analyses of the macro synteny revealed significant structural rearrangement between G. sulphuraria isolates and the genome shows signs of sexual recombination, which reveals a mechanism of intrinsic adaptability in this eukaryotic extremophile, uncovering how G. sulfuraria can thrive in a rapidly changing extreme environment.

With a Little Help from Prokaryotes

Evidence of massive gene transfers from Prokaryotes to a eukaryote, the unicellular red alga Galdieria sulphuraria, is presented on page 1207 of this issue.

Cold Acclimation of the Thermoacidophilic Red Alga Galdieria sulphuraria: Changes in Gene Expression and Involvement of Horizontally Acquired Genes

RNA-sequencing is applied to obtain insights into the acclimation of a thermophilic organism towards temperatures below its growth optimum and to study how horizontally acquired genes contribute to cold acclimations.

Antibacterial gene transfer across the tree of life

It is demonstrated that a bacterial lysozyme family integrated independently in all domains of life across diverse environments, generating the only glycosyl hydrolase 25 muramidases in plants and archaea and comprise the first characterization of an antibacterial gene in archaea.

Gene transfers from diverse bacteria compensate for reductive genome evolution in the chromatophore of Paulinella chromatophora

A dominant role for HGT in compensating for organelle genome reduction is demonstrated and it is suggested that phagotrophy may be a major driver of HGT.

Extreme Features of the Galdieria sulphuraria Organellar Genomes: A Consequence of Polyextremophily?

It is suggested that these unique genomic modifications result not only from the harsh conditions in which Galdieria lives but also from its unusual capability to grow heterotrophically, endolithically, and in the dark.

Metabolic Evolution in Galdieria Sulphuraria

Examination of the metabolic pathways encoded by the genome of G. sulphuraria revealed several pathways that are uncharacteristic for plants and algae, even red algae, and suggests a ‘metabolic patchwork’ of genes resulting from multiple evolutionary processes.

Frequent, independent transfers of a catabolic gene from bacteria to contrasted filamentous eukaryotes

The results show that effective inter-domain transfers and subsequent adaptation of a prokaryotic gene in eukaryotic cells can happen at an unprecedented magnitude.

Analysis of horizontal genetic transfer in red algae in the post-genomics age

The impacts of this infusion of red algal genome data on addressing questions regarding the complex nature of algal evolution are explored and the need for scalable phylogenomic approaches to handle the forthcoming deluge of sequence information is highlighted.
...

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