Horizontal gene transfer in eukaryotic evolution

2008 ◽  
Vol 9 (8) ◽  
pp. 605-618 ◽  
Author(s):  
Patrick J. Keeling ◽  
Jeffrey D. Palmer
Keyword(s):  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Eukaryotic Evolution

Prediction of horizontal gene transfers in eukaryotes: approaches and challenges

2009 ◽  
Vol 37 (4) ◽  
pp. 792-795 ◽  
Author(s):  
John W. Whitaker ◽  
Glenn A. McConkey ◽  
David R. Westhead
Keyword(s):  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Present Review ◽  
Bacterial Evolution ◽  
Eukaryotic Evolution ◽  
Metabolic Evolution ◽  
Eukaryotic Genomes

HGT (horizontal gene transfer) is recognized as an important force in bacterial evolution. Now that many eukaryotic genomes have been sequenced, it has become possible to carry out studies of HGT in eukaryotes. The present review compares the different approaches that exist for identifying HGT genes and assess them in the context of studying eukaryotic evolution. The metabolic evolution resource metaTIGER is then described, with discussion of its application in identification of HGT in eukaryotes.

scholarly journals Horizontal Gene Transfers from Bacteria toEntamoebaComplex: A Strategy for Dating Events along Species Divergence

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Miguel Romero ◽  
R. Cerritos ◽  
Cecilia Ximenez
Keyword(s):  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Entamoeba Histolytica ◽  
Lateral Gene Transfer ◽  
Adaptive Radiation ◽  
Fossil Record ◽  
Evolutionary History ◽  
Divergence Time ◽  
Eukaryotic Evolution ◽  
History Of

Horizontal gene transfer has proved to be relevant in eukaryotic evolution, as it has been found more often than expected and related to adaptation to certain niches. A relatively large list of laterally transferred genes has been proposed and evaluated for the parasiteEntamoeba histolytica. The goals of this work were to elucidate the importance of lateral gene transfer along the evolutionary history of some members of the genusEntamoeba, through identifying donor groups and estimating the divergence time of some of these events. In order to estimate the divergence time of some of the horizontal gene transfer events, the dating of someEntamoebaspecies was necessary, following an indirect dating strategy based on the fossil record of plausible hosts. The divergence betweenE. histolyticaandE. nuttalliiprobably occurred 5.93 million years ago (Mya); this lineage diverged fromE. dispar9.97 Mya, while the ancestor of the latter separated fromE. invadens68.18 Mya. We estimated times for 22 transferences; the most recent occurred 31.45 Mya and the oldest 253.59 Mya. Indeed, the acquisition of genes through lateral transfer may have triggered a period of adaptive radiation, thus playing a major role in the evolution of theEntamoebagenus.

scholarly journals Phytoplankton pangenome reveals extensive prokaryotic horizontal gene transfer of diverse functions

2020 ◽  
Vol 6 (18) ◽  
pp. eaba0111 ◽  
Author(s):  
Xiao Fan ◽  
Huan Qiu ◽  
Wentao Han ◽  
Yitao Wang ◽  
Dong Xu ◽  
...  
Keyword(s):  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Red Algae ◽  
Reactive Species ◽  
Eukaryotic Evolution ◽  
Polysaccharide Biosynthesis ◽  
The Impact ◽  
Robust Evidence

The extent and role of horizontal gene transfer (HGT) in phytoplankton and, more broadly, eukaryotic evolution remain controversial topics. Recent studies substantiate the importance of HGT in modifying or expanding functions such as metal or reactive species detoxification and buttressing halotolerance. Yet, the potential of HGT to significantly alter the fate of species in a major eukaryotic assemblage remains to be established. We provide such an example for the ecologically important lineages encompassed by cryptophytes, rhizarians, alveolates, stramenopiles, and haptophytes (“CRASH” taxa). We describe robust evidence of prokaryotic HGTs in these taxa affecting functions such as polysaccharide biosynthesis. Numbers of HGTs range from 0.16 to 1.44% of CRASH species gene inventories, comparable to the ca. 1% prokaryote-derived HGTs found in the genomes of extremophilic red algae. Our results substantially expand the impact of HGT in eukaryotes and define a set of general principles for prokaryotic gene fixation in phytoplankton genomes.

scholarly journals Detection of Horizontal Gene Transfer in the Genome of the Choanoflagellate Salpingoeca rosetta

2020 ◽  
Author(s):  
Danielle M. Matriano ◽  
Rosanna A. Alegado ◽  
Cecilia Conaco
Keyword(s):  
Extracellular Matrix ◽  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Ecological Niches ◽  
Eukaryotic Evolution ◽  
Genomic Features ◽  
Extracellular Matrix Components ◽  
External Cues ◽  
Matrix Components ◽  
Salpingoeca Rosetta

AbstractHorizontal gene transfer (HGT), the movement of heritable materials between distantly related organisms, is crucial in eukaryotic evolution. However, the scale of HGT in choanoflagellates, the closest unicellular relatives of metazoans, and its possible roles in the evolution of animal multicellularity remains unexplored. We identified 703 potential HGTs in the S. rosetta genome using sequence-based tests. The majority of which were orthologous to bacterial lineages, yet displayed genomic features consistent with the rest of the S. rosetta genome – evidence of ancient acquisition events. Putative functions include enzymes involved in amino acid and carbohydrate metabolism, cell signaling, the synthesis of extracellular matrix components, and the detection of bacterial compounds. Functions of candidate HGTs may have contributed to the ability of choanoflagellates to assimilate novel metabolites, thereby supporting adaptation, survival in diverse ecological niches, and response to external cues that are possibly critical in the evolution of multicellularity in choanoflagellates.

scholarly journals Detection of horizontal gene transfer in the genome of the choanoflagellate Salpingoeca rosetta

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Danielle M. Matriano ◽  
Rosanna A. Alegado ◽  
Cecilia Conaco
Keyword(s):  
Extracellular Matrix ◽  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Ecological Niches ◽  
Eukaryotic Evolution ◽  
Genomic Features ◽  
Extracellular Matrix Components ◽  
External Cues ◽  
Matrix Components ◽  
Salpingoeca Rosetta

AbstractHorizontal gene transfer (HGT), the movement of heritable materials between distantly related organisms, is crucial in eukaryotic evolution. However, the scale of HGT in choanoflagellates, the closest unicellular relatives of metazoans, and its possible roles in the evolution of animal multicellularity remains unexplored. We identified at least 175 candidate HGTs in the genome of the colonial choanoflagellate Salpingoeca rosetta using sequence-based tests. The majority of these were orthologous to genes in bacterial and microalgal lineages, yet displayed genomic features consistent with the rest of the S. rosetta genome—evidence of ancient acquisition events. Putative functions include enzymes involved in amino acid and carbohydrate metabolism, cell signaling, and the synthesis of extracellular matrix components. Functions of candidate HGTs may have contributed to the ability of choanoflagellates to assimilate novel metabolites, thereby supporting adaptation, survival in diverse ecological niches, and response to external cues that are possibly critical in the evolution of multicellularity in choanoflagellates.

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