4.7 Article

New insights on the evolutionary relationships between the major lineages of Amoebozoa

Journal

SCIENTIFIC REPORTS
Volume 12, Issue 1, Pages -

Publisher

NATURE PORTFOLIO
DOI: 10.1038/s41598-022-15372-7

Keywords

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Funding

  1. National Science Foundation EiR [1831958]
  2. National Institutes of Health [1R15GM116103-02]
  3. RSF [20-14-00195]
  4. Russian Science Foundation [20-14-00195] Funding Source: Russian Science Foundation
  5. Direct For Biological Sciences
  6. Division Of Environmental Biology [1831958] Funding Source: National Science Foundation

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The supergroup Amoebozoa includes a wide diversity of amoeboid organisms and previously enigmatic lineages. By surveying available genomes and transcriptomes, researchers generated a large supermatrix, revealing novel deep level relationships and resolving placement of enigmatic lineages congruent with morphological data. The evolution of Amoebozoa is hypothesized to have been driven by adaptive responses to a changing environment.
The supergroup Amoebozoa unites a wide diversity of amoeboid organisms and encompasses enigmatic lineages that have been recalcitrant to modern phylogenetics. Deep divergences, taxonomic placement of some key taxa and character evolution in the group largely remain poorly elucidated or controversial. We surveyed available Amoebozoa genomes and transcriptomes to mine conserved putative single copy genes, which were used to enrich gene sampling and generate the largest supermatrix in the group to date; encompassing 824 genes, including gene sequences not previously analyzed. We recovered a well-resolved and supported tree of Amoebozoa, revealing novel deep level relationships and resolving placement of enigmatic lineages congruent with morphological data. In our analysis the deepest branching group is Tubulinea. A recent proposed major clade Tevosa, uniting Evosea and Tubulinea, is not supported. Based on the new phylogenetic tree, paleoecological and paleontological data as well as data on the biology of presently living amoebozoans, we hypothesize that the evolution of Amoebozoa probably was driven by adaptive responses to a changing environment, where successful survival and predation resulted from a capacity to disrupt and graze on microbial mats-a dominant ecosystem of the mid-Proterozoic period of the Earth history.

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