8DGC

Avs3 bound to phage PhiV-1 terminase

Summary for 8DGC

• Entry DOI: 10.2210/pdb8dgc/pdb
• EMDB information: 27421
• Descriptor: SeAvs3, Terminase, large subunit, ADENOSINE-5'-TRIPHOSPHATE, ... (4 entities in total)
• Functional Keywords: phage defense, pattern-recognition receptor, nlr, stand, atpase, antiviral protein
• Biological source: Salmonella enterica; More
• Total number of polymer chains: 8
• Total formula weight: 1216819.64

Authors

Wilkinson, M.E.,Gao, L.,Strecker, J.,Makarova, K.S.,Macrae, R.K.,Koonin, E.V.,Zhang, F. (deposition date: 2022-06-23, release date: 2022-08-03, Last modification date: 2024-02-14)

Primary citation

Gao, L.A.,Wilkinson, M.E.,Strecker, J.,Makarova, K.S.,Macrae, R.K.,Koonin, E.V.,Zhang, F.
Prokaryotic innate immunity through pattern recognition of conserved viral proteins.
Science, 377:eabm4096-eabm4096, 2022

PubMed Abstract: Many organisms have evolved specialized immune pattern-recognition receptors, including nucleotide-binding oligomerization domain-like receptors (NLRs) of the STAND superfamily that are ubiquitous in plants, animals, and fungi. Although the roles of NLRs in eukaryotic immunity are well established, it is unknown whether prokaryotes use similar defense mechanisms. Here, we show that antiviral STAND (Avs) homologs in bacteria and archaea detect hallmark viral proteins, triggering Avs tetramerization and the activation of diverse N-terminal effector domains, including DNA endonucleases, to abrogate infection. Cryo-electron microscopy reveals that Avs sensor domains recognize conserved folds, active-site residues, and enzyme ligands, allowing a single Avs receptor to detect a wide variety of viruses. These findings extend the paradigm of pattern recognition of pathogen-specific proteins across all three domains of life.

PubMed: 35951700
DOI: 10.1126/science.abm4096

Experimental method

ELECTRON MICROSCOPY (3.4 Å)