ArticleMolecular biology and evolution2012
Collodictyon--an ancient lineage in the tree of eukaryotes.
Article in Molecular biology and evolution, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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31 citing papers in PubMed, 89 citations in OpenAlex.
- Review
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- Barthelonids represent a deep-branching metamonad clade with mitochondrion-related organelles predicted to generate no ATP.Proceedings. Biological sciences · 2020Article
- New Phylogenomic Analysis of the Enigmatic Phylum Telonemia Further Resolves the Eukaryote Tree of Life.Molecular biology and evolution · 2019Article
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- Enigmatic Diphyllatea eukaryotes: culturing and targeted PacBio RS amplicon sequencing reveals a higher order taxonomic diversity and global distribution.BMC evolutionary biology · 2018Article
- Combined morphological and phylogenomic re-examination of malawimonads, a critical taxon for inferring the evolutionary history of eukaryotes.Royal Society open science · 2018Article
- Phylogenomics Places Orphan Protistan Lineages in a Novel Eukaryotic Super-Group.Genome biology and evolution · 2018Article
- The origin of Metazoa: a unicellular perspective.Nature reviews. Genetics · 2017Review
- Quest for Ancestors of Eukaryal Cells Based on Phylogenetic Analyses of Aminoacyl-tRNA Synthetases.Journal of molecular evolution · 2017Article
- Ecological and evolutionary significance of novel protist lineages.European journal of protistology · 2016Article
- Group II Intron-Mediated Trans-Splicing in the Gene-Rich Mitochondrial Genome of an Enigmatic Eukaryote, Diphylleia rotans.Genome biology and evolution · 2016Article
- The past, present and future of mitochondrial genomics: have we sequenced enough mtDNAs?Briefings in functional genomics · 2016Review
- Viruses and cells intertwined since the dawn of evolution.Virology journal · 2015Review
- Bacterial proteins pinpoint a single eukaryotic root.Proceedings of the National Academy of Sciences of the United States of America · 2015Article
- BIR Pipeline for Preparation of Phylogenomic Data.Evolutionary bioinformatics online · 2015Review
- The mitochondrial genomes of the glaucophytes Gloeochaete wittrockiana and Cyanoptyche gloeocystis: multilocus phylogenetics suggests a monophyletic archaeplastida.Genome biology and evolution · 2014Article
- On the age of eukaryotes: evaluating evidence from fossils and molecular clocks.Cold Spring Harbor perspectives in biology · 2014Review
- BLASTGrabber: a bioinformatic tool for visualization, analysis and sequence selection of massive BLAST data.BMC bioinformatics · 2014Article
- The eukaryotic tree of life from a global phylogenomic perspective.Cold Spring Harbor perspectives in biology · 2014Review
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The current consensus for the eukaryote tree of life consists of several large assemblages (supergroups) that are hypothesized to describe the existing diversity. Phylogenomic analyses have shed light on the evolutionary relationships within and between supergroups as well as placed newly sequenced enigmatic species close to known lineages. Yet, a few eukaryote species remain of unknown origin and could represent key evolutionary forms for inferring ancient genomic and cellular characteristics of eukaryotes. Here, we investigate the evolutionary origin of the poorly studied protist Collodictyon (subphylum Diphyllatia) by sequencing a cDNA library as well as the 18S and 28S ribosomal DNA (rDNA) genes. Phylogenomic trees inferred from 124 genes placed Collodictyon close to the bifurcation of the "unikont" and "bikont" groups, either alone or as sister to the potentially contentious excavate Malawimonas. Phylogenies based on rDNA genes confirmed that Collodictyon is closely related to another genus, Diphylleia, and revealed a very low diversity in environmental DNA samples. The early and distinct origin of Collodictyon suggests that it constitutes a new lineage in the global eukaryote phylogeny. Collodictyon shares cellular characteristics with Excavata and Amoebozoa, such as ventral feeding groove supported by microtubular structures and the ability to form thin and broad pseudopods. These may therefore be ancient morphological features among eukaryotes. Overall, this shows that Collodictyon is a key lineage to understand early eukaryote evolution.
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