ArticleScientific reports2019
Evolutionary dynamics of the chromatophore genome in three photosynthetic Paulinella species.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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22 citing papers in PubMed, 55 citations in OpenAlex.
- Evidence of Relaxed Selection in the Mitochondrial Genomes of Phototrophic Paulinella Lineages.Genome biology and evolution · 2026Article
- Review
- Dating the Origin and Spread of Plastids and Chromatophores.International journal of molecular sciences · 2025Article
- Protein import into bacterial endosymbionts and evolving organelles.The FEBS journal · 2025Review
- R-DeeP/TripepSVM identifies the RNA-binding OB-fold-like protein PatR as regulator of heterocyst patterning.Nucleic acids research · 2025Article
- The Nitroplast and Its Relatives Support a Universal Model of Features Predicting Gene Retention in Endosymbiont and Organelle Genomes.Genome biology and evolution · 2024Article
- Convergent reductive evolution of cyanobacteria in symbiosis with Dinophysiales dinoflagellates.Scientific reports · 2024Article
- Evidence of a putative COEnvironmental microbiology reports · 2024Article
- Position of Algae on the Tree of Life.Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections · 2022Article
- Review
- Tracking N-terminal protein processing from the Golgi to the chromatophore of a rhizarian amoeba.Plant physiology · 2022Article
- Hypothesis: Trans-splicing Generates Evolutionary Novelty in the Photosynthetic Amoeba Paulinella.Journal of phycology · 2022Article
- Tightly Constrained Genome Reduction and Relaxation of Purifying Selection during Secondary Plastid Endosymbiosis.Molecular biology and evolution · 2022Article
- Why is primary endosymbiosis so rare?The New phytologist · 2021Review
- Independent evolution of the thioredoxin system in photosynthetic Paulinella species.Current biology : CB · 2021Article
- Discovery of a small protein factor involved in the coordinated degradation of phycobilisomes in cyanobacteria.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Amoeba Genome Reveals Dominant Host Contribution to Plastid Endosymbiosis.Molecular biology and evolution · 2021Article
- Paulinella, a model for understanding plastid primary endosymbiosis.Journal of phycology · 2020Review
- Genomic Insights into Plastid Evolution.Genome biology and evolution · 2020Review
- Phytoplankton pangenome reveals extensive prokaryotic horizontal gene transfer of diverse functions.Science advances · 2020Article
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Authors and funding
6 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The thecate amoeba Paulinella is a valuable model for understanding plastid organellogenesis because this lineage has independently gained plastids (termed chromatophores) of alpha-cyanobacterial provenance. Plastid primary endosymbiosis in Paulinella occurred relatively recently (90-140 million years ago, Mya), whereas the origin of the canonical Archaeplastida plastid occurred >1,500 Mya. Therefore, these two events provide independent perspectives on plastid formation on vastly different timescales. Here we generated the complete chromatophore genome sequence from P. longichromatophora (979,356 bp, GC-content = 38.8%, 915 predicted genes) and P. micropora NZ27 (977,190 bp, GC-content = 39.9%, 911 predicted genes) and compared these data to that from existing chromatophore genomes. Our analysis suggests that when a basal split occurred among photosynthetic Paulinella species ca. 60 Mya, only 35% of the ancestral orthologous gene families from the cyanobacterial endosymbiont remained in chromatophore DNA. Following major gene losses during the early stages of endosymbiosis, this process slowed down significantly, resulting in a conserved gene content across extant taxa. Chromatophore genes faced relaxed selection when compared to homologs in free-living alpha-cyanobacteria, likely reflecting the homogeneous intracellular environment of the Paulinella host. Comparison of nucleotide substitution and insertion/deletion events among different P. micropora strains demonstrates that increases in AT-content and genome reduction are ongoing and dynamic processes in chromatophore evolution.
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