8p4k
Vaccinia Virus palisade layer A10 trimer
Structural highlights
FunctionPG136_VACCW Core protein 4a is the most abundant virion protein. Major component of the virion core that undergoes proteolytic processing during the immature virion (IV) to mature virion (MV) transition.[1] Publication Abstract from PubMedPoxviruses are among the largest double-stranded DNA viruses, with members such as variola virus, monkeypox virus and the vaccination strain vaccinia virus (VACV). Knowledge about the structural proteins that form the viral core has remained sparse. While major core proteins have been annotated via indirect experimental evidence, their structures have remained elusive and they could not be assigned to individual core features. Hence, which proteins constitute which layers of the core, such as the palisade layer and the inner core wall, has remained enigmatic. Here we show, using a multi-modal cryo-electron microscopy (cryo-EM) approach in combination with AlphaFold molecular modeling, that trimers formed by the cleavage product of VACV protein A10 are the key component of the palisade layer. This allows us to place previously obtained descriptions of protein interactions within the core wall into perspective and to provide a detailed model of poxvirus core architecture. Importantly, we show that interactions within A10 trimers are likely generalizable over members of orthopox- and parapoxviruses. Multi-modal cryo-EM reveals trimers of protein A10 to form the palisade layer in poxvirus cores.,Datler J, Hansen JM, Thader A, Schlogl A, Bauer LW, Hodirnau VV, Schur FKM Nat Struct Mol Biol. 2024 Jul;31(7):1114-1123. doi: 10.1038/s41594-023-01201-6. , Epub 2024 Feb 5. PMID:38316877[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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