archaeon Archives

A: Bioreactor setup of A. manzaensis grown on ESAE-01 basalt analog material. B: Exposure wells with desiccated A. manzaensis cells and ESAE-01 basalt pellets. C: Successful recultivation of A. manzaensis cells after 1 month of desiccation. -- chemrxiv.org

Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Habitable Zones, Mars, Microbiology & Virology, Status Report

A Two-week Journey To Mars: Investigating Changes In Thiophene-bearing Quinones Of The Extremely Thermoacidophilic Archaeon Acidianus manzaensis

by Keith CowingJuly 21, 2025July 21, 2025

In the search for reliable biomarker in other planetary environments such as Mars, we need molecules that are stable over geological timescales while preserving indicative information about their potential biological […]

Multi-layered pipeline for identifying bacterium/archaeon pairs with similar genomic signatures. Layer 1: Five selected non-parametric clustering methods identify clusters of organisms with similar genomic signatures. The clusters containing both bacteria and archaea (green) generate a list of 78 candidate bacterium–archaeon pairs, grouped by these algorithms based on their similar genomic signatures. Layer 2-a:: The candidate pairs from Layer 1 undergo pairwise distance calculations between their FCGRs using four different distance metrics. Only 40 pairs, with the majority of distances below empirically determined thresholds, are retained. Layer 2-b: In parallel to FCGR comparison, a biological analysis is conducted on the output pairs from Layer 1. This includes checking environment labels and examining metadata about their living environments to select pairs isolated from similar types of extreme environments, resulting in 20 pairs. The final output is a list of 15 bacterium/archaeon pairs (comprising 16 unique genera and 20 unique species) that passed all filtering layers. These pairs can confidently be proposed as maximally divergent microbes that share similar genomic signatures associated with their living environments. -- biorxiv.org

AI - Data - Apps - Cybernetics, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Nomenclature, Systematics, Natural History, Status Report

Life At The Extremes: Maximally Divergent Microbes With Similar Genomic Signatures Linked To Extreme Environments

by Keith CowingJune 30, 2025June 28, 2025

Extreme environments impose strong mutation and selection pressures that drive distinctive, yet understudied, genomic adaptations in extremophiles.

archaeon

A Two-week Journey To Mars: Investigating Changes In Thiophene-bearing Quinones Of The Extremely Thermoacidophilic Archaeon Acidianus manzaensis

Life At The Extremes: Maximally Divergent Microbes With Similar Genomic Signatures Linked To Extreme Environments

Underwater Oxygen Loss Threatens Earth’s Stability, Researchers Warn

Fire And Ice: Were Yellowstone’s Past Volcanic Eruptions And Glaciations Related?

Substrate-Agnostic 3x: Biosignatures, Technosignatures, Ecologies

Planet-moon Ejections In Close Stellar Encounters

First Study Hints Solar Storms May Alter The Weather During Martian Dust Storms