by Christoph
On our way out of 𝕏 (formerly Twitter), I look through soon-to-be-obsolete "bookmarks" and show you what shouldn't just end up in the bin. I started this collection of paraphernalia (?) with Lost & Found #1 and here now are three more salvaged bookmarks in Lost & Found #2.
Bookmark #1
Ribosomologists today have an bustling zoo of high-resolution structures of all possible types of ribosomes, of small and large subunits, and also of ribosomes bound to 1, 2, or 3 tRNAs. These forms can even be imaged side-by-side in whole cells at resolutions in the 4–10 angstrom (Å) range with the help of CryoET. The tweet was based on a preprint and has since been published.
Preprint of our in-cell structural study on #ribosomes using #cryoET and #SubTomoAnalysis is out!
— Liang Xue (@Liang_Xue_) December 19, 2021
We captured the translation machinery in action inside native bacterial cells, with over 13 ribosome intermediates resolved at 4-10Å resolutions.https://t.co/ZVkwMNGfWy pic.twitter.com/BsNrAOJD50
If the tweet is no longer available, you can see a screen capture here, and the video here (GIF).
Bookmark #2
Both the tiny Patescibacteria (CPR bacteria) and the DPANN archaea could so far only be obtained as co‑cultures with their respective bacterial or archaeal hosts. They are thought to thrive mainly if not exclusively as epibionts of their hosts (here and here in STC). And this symbiosis is probably not mutually beneficial; they are more of a nuisance for their hosts. As far as I'm aware there has not yet been a study that finds DPANN archaea as epibionts of bacteria (please correct me, I've lost track). But, as Nicole – now @nicoledubilier.bsky.social on Bluesky – points out in her tweet, there are apparently Patescibacteria that grow on Methanotrix archaea. Her tweet was based on a published paper, in which the authors state: "...results show a novel cross-domain parasitism between Bacteria and Archaea".
Impressive images of CPR bacteria associated with Archaea - nice!
— Nicole Dubilier (@NicoleDubilier) September 2, 2022
Symbiosis between Candidatus Patescibacteria and Archaea Discovered in Wastewater-Treating Bioreactors | mBio https://t.co/cXdY67oXqh pic.twitter.com/k7KggmoiMq
If the tweet is no longer available, you can see a screen capture here, and the image here.
Bookmark #3
Among all the various small things we consider here in STC, we have largely neglected the Zygomycetes – not so Elio, of course, who wrote Three to Tango featuring Rhizopus microsporus. These fungi were named after their specific formation of (meiotic) zygospores, which develop when compatible mating types come into contact via hyphal tips. Zygospores are easy to see in the dense and mostly whitish hyphal network because of their pigmentation, as Norio Takeshita shows in the video.
Mucoromycota fungus zygospore formationhttps://t.co/jszDR3ezzn pic.twitter.com/Hh6oSGnkVV
— Norio Takeshita (@NTfungalcell) July 24, 2024
If the tweet is no longer available, you can see a screen capture here, and the video here (GIF).
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