Our work on ribosome hibernation in archaea is out!
We identified Hib, a new hibernation factor broadly distributed across archaea.
Check out the preprint 👉 biorxiv.org/content/10.1101/2025.10.11.676729v1
(1/🧵)
Video
Thank you Olivier !
In a stressed P. abyssi culture, almost 50%.
It does not translocate, the C-ter remains locked in the decoding center in all 3 conformations. It's unclear how Hib, or other hibernation factors are released..
Merci @xpolytechnique.bsky.social pour le coup de projecteur sur notre étude ! 🔬 Comment les ribosomes des archées hibernent-ils ?
Réponse ici :
Sharing this figure from the Koonin lab: www.nature.com/articles/s41...
Worth printing large and framing
yep ! and with little biomass
2/🧵 - Hib adds to the growing list of archaeal ribosome hibernation factors, alongside recently identified Dri and aRDF. It is detected in all major archaeal lineages, representing about 47% of all genomes.
Happy to share our latest paper: www.nature.com/articles/s41...
Great collaboration with @ifremer.bsky.social, @cbitoulouse.bsky.social & @pasteur.fr.
Studying stress in P. abyssi with near-native, minimally purified ribosomes, we identified HibA, a new hibernation factor widespread in Archaea.
4/🧵 - In one of these conformations, Hib blocks the peptidyl transferase center (PTC) of the large subunit by occupying both the A and P sites : A long Hib loop encircles nucleotide A2834, which separates the P and A sites, effectively locking the ribosome in an inactive state