![Rubisco form II structural differences between T. arctica UC1 and H. marinus. A) AlphaFold-generated [51,52] structures for H. marinus (transparent white) and T. arctica UC1 RbcII (dark blue) dimers aligned with ChimeraX [53]. Active sites colored red. Arrows point to the additional exposed active site residues in UC1 compared to H. marinus. The missing residues in UC1 at amino acid positions 78–82 (Fig. 4) are colored yellow on H. marinus structure (close44 up view in B). C) UC1 form II dimer with residue differences to H. marinus that confer a semi45 conservative or non-conservative change highlighted in orange.-- biorxiv.org](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/08/Prevalence-of-the-Calvin.png?resize=1200%2C720&ssl=1)
The act of fixing inorganic carbon into the biosphere is largely facilitated by one enzyme, Rubisco. Beyond well-studied plants and cyanobacteria, many bacteria use Rubisco for chemolithoautotrophy in extreme environments […]
Imagery from the solar-powered spacecraft shows some intriguing features on the ice-encased Jovian moon.
Characterizing the exchange of water between the Martian atmosphere and the (sub)surface is a major challenge for understanding the mechanisms that regulate the water cycle.
The search for life beyond Earth fascinates many and inspires big questions: Are we truly alone in the Universe? Is our Earth unique? Is it possible that life beyond Earth […]
NASA-supported scientists have provided new information about the behavior of organic molecules frozen in brine (e.g. salty water) under conditions similar to the surface of Saturn’s moon Enceladus. The results […]
A shallow, briny pond located in what is often considered one of the most Mars-like regions on Earth is probably being fed by groundwater seeping up, rather than moisture seeping […]
