Joanna MaselDec 12, 2024
We identified protein domains in LUCA (#LastUniversalCommonAncestor). Their distinctive #AminoAcid usage reveals the order amino acids were added to the #GeneticCode, based mostly on size. Older proteins hint at earlier alternative codes. 1/15 https://www.pnas.org/doi/10.1073/pnas.2410311121 #astrobiology #phylostratigraphy #sulfur #metalloproteins
Francis Mangion (M)Aug 20, 2024

#LastUniversalCommonAncestor #LUCA #NotTheFirstLivingOrganism

Major Discoveries About LUCA - Organism All Life Evolved From. https://youtube.com/watch?v=DOUTF2cH4Ao&si=lbuLxeQMO7xKrUd4

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Mathew ThomasAug 18, 2024
All #Life On #Earth Originates From #OneAncestor, Older Than Previously Believed
A new study estimates that #LUCA, the #LastUniversalCommonAncestor of all life on Earth, existed around #4billionyearsago.
https://www.ndtv.com/science/all-life-on-earth-originates-from-one-ancestor-older-than-previously-believed-6355196
All Life On Earth Originates From One Ancestor, Older Than Previously Believed

A new study estimates that LUCA, the Last Universal Common Ancestor of all life on Earth, existed around 4.2 billion years ago.

NDTV
Mathew ThomasJul 18, 2024
Searching for #LUCA, the #firstlifeform from which all other life descended
#Scientists have said the #lastuniversalcommonancestor could have formed just 300 million years after the #earthformed.
https://www.thehindu.com/sci-tech/science/searching-for-luca-the-first-life-form-from-which-all-other-life-descended/article68409763.ece
Searching for LUCA, the first life-form from which all other life descended

In a recent paper in the journal Nature Ecology and Evolution, researchers at the University of Bristol and Exeter in the U.K. constructed a phylogenetic tree of 350 bacterial and 350 archaeal genomes. Then, using a molecular clock, the team estimated when LUCA could have originated: around 4.2 billion years ago, just 300 million years after the earth itself formed.

The Hindu
Spektrum (inoffiziell)Jun 14, 2023
Fachübergreifende Forschungsarbeiten liefern Hinweise darauf, wie das Leben entstand.#Evolution #präbiotisch #chemischeEvolution #Luca #hydrothermal #Tiefseequelle #Stoffwechsel #lastuniversalcommonancestor #Biologie #Chemie #ErdeUmwelt
Evolution: Vom Gestein zur ersten Zelle
Evolution: Vom Gestein zur ersten Zelle

Fachübergreifende Forschungsarbeiten liefern Hinweise darauf, wie das Leben entstand

Show threadJoanna MaselNov 23, 2022
@RobLanfear I use #phylogenetics for studying long-term trends in #protein #evolution, classifying proteins by age since birth, and looking for biases in retention and in descent with modification. We are currently interested in reconstructing the #proteome of the #LastUniversalCommonAncestor.