Simon Zerafa (Status: 
😊)A newly indetified marine eukaryote which seems to be a unique (potential ancient) branch of life 🙂
Bill Minarik‘We’re All Asgardians’ a talk on the origins of Eukaryotes (us) with implications for our present-day immune systems by Brett Baker, University of Texas, Austin. Dr. Baker inaugurated the EPS Wares Distinguished Public Lecture series.
Eukaryotic cells are most closely related to the 'Hod' branch of the Asgard branch of the Archaea.
#Eukaryote #Archaea #Evolution #UTAustin #McGillIUniversity #EarthSystemScience #WaresLecture
tomsharpIn 1925, Édouard Chatton distinguished prokaryote from eukaryote cell types. #Poetry #Science #History #Biology #Prokaryote #Eukaryote #Chatton (https://sharpgiving.com/thebookofscience/items/p1925e.html)
NIOO-KNAWNew publication: The European Reference #Genome Atlas: piloting a decentralised approach to equitable #biodiversity genomics. #genomics #eukaryote #sequencing
💧🌏 Greg CocksEarth's Billion-Year Balancing Act
--
https://phys.org/news/2024-02-earth-billion-year.html <-- shared technical article
--
https://doi.org/10.1130/GSATG423C.1 <-- shared paper
--
#geology #geologichistory #BoringBillion #BalancedBillion #earth #earthhistory #life #lifeonearth #atmosphere #oxygenation #structuralgeology #tectonics #complexlife #eukaryote #platetectonics #crust #mantle #core
--
https://phys.org/news/2024-02-earth-billion-year.html <-- shared technical article
--
https://doi.org/10.1130/GSATG423C.1 <-- shared paper
--
#geology #geologichistory #BoringBillion #BalancedBillion #earth #earthhistory #life #lifeonearth #atmosphere #oxygenation #structuralgeology #tectonics #complexlife #eukaryote #platetectonics #crust #mantle #core
katch wreck"..the oldest #eukaryote-bearing units already show species richness levels similar to those of the much younger & more heavily sampled Tonian period..these oldest eukaryotic assemblages show significant morphological disparity, particularly in #vesicle construction. These high levels of..species richness & morphological disparity suggest that although late Palaeoproterozoic units preserve our oldest record of #eukaryotes, the eukaryotic clade has a much deeper #history"
Lukas VFN 🇪🇺These #microbes have been thriving without #mitochondria since the age of #dinosaurs!
7 years ago, we identified the first known #eukaryote that has completely lost its mitochondria in a humble inhabitant of #chinchilla's gut - #Monocercomonoides exilis.
Today, we can say with confidence, that this intriguing simplification of the cell is not unique to M. exilis, but shared with many of its relatives. This means that it happened at least 100 million years ago!
https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1011050
Genomics of Preaxostyla Flagellates Illuminates the Path Towards the Loss of Mitochondria
Author summary Mitochondria are nearly ubiquitous components of eukaryotic cells that constitute bodies of animals, fungi, plants, algae, and a broad diversity of single-celled eukaryotes, a.k.a. protists. Many groups of protists have substantially reduced the complexity of their mitochondria because they live in oxygen-poor environments, so they are unable to utilize the most salient feature of mitochondria–their ATP-producing oxidative phosphorylation metabolism. However, for a long time, scientists thought that it is impossible to completely lose a mitochondrion because this organelle provides other essential services to the cell, e.g. synthesis of protein cofactors called iron-sulfur clusters. Detailed investigation of the chinchilla symbiont M. exilis documented the first case of an organism without mitochondrion, and it also provided a scenario explaining how this unique evolutionary experiment might have happened. In this work, we expand on this discovery by exploring genomes of multiple relatives of M. exilis. We show that the loss of the mitochondrion is not limited to a single species but possibly extends to its entire group, the oxymonads. We also compare the predicted metabolic capabilities of oxymonads to their closest known mitochondrion-containing relatives and map out various changes that occurred during the transition to amitochondriality.
Mikko Kolkkala"You are here"
#TreeOfLife #eukaryote #phylogeny
Image credits: https://www.sciencenews.org/article/tree-life-gets-makeover#&gid=1&pid=1
Mikko Kolkkala
Dave J“Lost World” of Ancient Creatures Discovered – 1.6 Billion-Year-Old Eukaryotic Organisms https://scitechdaily.com/lost-world-of-ancient-creatures-discovered-1-6-billion-year-old-eukaryotic-organisms/ #palaeontology #paleontology #microbiology #eukaryote #fossils #science
“Lost World” of Ancient Creatures Discovered – 1.6 Billion-Year-Old Eukaryotic Organisms
Researchers have discovered 1.6 billion-year-old eukaryotic organisms, the Protosterol Biota, believed to be Earth's first predators. These ancient creatures, found through fossil fat molecules in ancient rocks, were more complex than bacteria, predating and likely shaping early marine ecosystems. T