[Astrobiology via PubMed]. Photochemical organic hazes such as those found in the atmosphere of Titan, the largest satellite of Saturn, are mainly composed of reduced chemical components.
Origin & Evolution of Life
Posted inBiogeochemical Cycles & Geobiology
A Geochemical Precursor of ATP
[Heinrich-Heine University Duesseldorf] Where did the energy come from to power the chemical origin of life and how did phosphate come to be the universal energy currency of cells?
Posted inOrigin & Evolution of Life
Molecular Complexity As A Signature Of Life
[PNAS Nexus] The presence of an abundance of complex molecules has been proposed as a universal signature of life. Molecular complexity is often measured by the “assembly index,” which calculates […]
Posted inBiogeochemical Cycles & Geobiology
Activity And Diversity Of Sulfate- and Methane-based Pathways Of Anaerobic Chitin And N-acetylglucosamine Degradation In Marine Sediments
[American Society of Microbiology] Sulfate reduction is estimated to account for half of the organic carbon respiration in anoxic, organic-rich ocean sediments. Sulfate-reducing microorganisms (SRMs) typically oxidize simple carbon compounds, […]
Posted inGenomics, Proteomics, Bioinformatics
Generating Eukaryotic Reference Genome Assemblies: Earth BioGenome Project Quality Standards And Recommendations
[q-bio.GN] Reference genome assemblies are foundational resources across the biological sciences as they begin to expose the fundamental building blocks of each species and the molecular toolkits vital for adaptation […]
![Initial 𝑎c–𝑒c distribution of the 32,000 comets used in each end-to-end calculation. Dashed lines mark the semimajor axes of P7 and P8. The circular and eccentric planet calculations use identical comet initial states.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Planetary.png?resize=1200%2C604&ssl=1)
Posted inComets and Asteroids
Planetary Eccentricity Enhances Inward Comet Transport But Suppresses Gentle Impacts
[astro-ph.EP] Comets can supply volatile and prebiotic material to rocky planets, but survival of fragile molecules depends on atmospheric entry and impact. Compact planet chains can transfer comets inward at […]
Posted inGenomics, Proteomics, Bioinformatics
Chemical Structure Of RNA With Thiophosphate-modified Linker
[Tokyo Metropolitan University] Original source (Japanese) https://kyodonewsprwire.jp/release/202609246495 Points We discovered that the linkers (connection points) between ribosomal RNA (rRNA) and transfer RNA (tRNA) in archaea, microorganisms that inhabit high-temperature environments, […]
Posted inGenomics, Proteomics, Bioinformatics
Pathways Of Early Evolution From The Perspectives Of A Riboreplisome — The Ultimate RNA Machine Of Life
[q-bio.PE] Translation of the genetic code into proteins is universal across life, with ribosomes serving as the ancient molecular machines enabling this information transformation. We propose that early replication and […]
Posted inMicrobiology & Virology
Bacteriophage Qβ: Six Decades at the Frontier of Molecular and Viral Evolution Genome, Particle And Mutational Landscape Of Bacteriophage Qβ
[q-bio.PE] Bacteriophage Qβ, first isolated in 1961, has served for more than six decades as a model system for molecular and viral evolution.
Posted inGenomics, Proteomics, Bioinformatics
Catalog Of Mitochondria Across Life’s Family Tree Unearths New Roles For The Cell’s Powerhouse
[Broad Institute of MIT and Harvard] A research consortium has generated the broadest look yet at the proteins that make up mitochondria, capturing the organelle’s diversity across multiple branches on […]