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Wang, Fengbin; Cvirkaite-Krupovic, Virginija; Vos, Matthijn; Beltran, Leticia C.; Kreutzberger, Mark A.B.; Winter, Jean-Marie; Su, Zhangli; Liu, Jun; Schouten, Stefan; Krupovic, Mart; Egelman, Edward H.
Cell, 04/2022, Letnik: 185, Številka: 8Journal Article
Spindle- or lemon-shaped viruses infect archaea in diverse environments. Due to the highly pleomorphic nature of these virions, which can be found with cylindrical tails emanating from the spindle-shaped body, structural studies of these capsids have been challenging. We have determined the atomic structure of the capsid of Sulfolobus monocaudavirus 1, a virus that infects hosts living in nearly boiling acid. A highly hydrophobic protein, likely integrated into the host membrane before the virions assemble, forms 7 strands that slide past each other in both the tails and the spindle body. We observe the discrete steps that occur as the tail tubes expand, and these are due to highly conserved quasiequivalent interactions with neighboring subunits maintained despite significant diameter changes. Our results show how helical assemblies can vary their diameters, becoming nearly spherical to package a larger genome and suggest how all spindle-shaped viruses have evolved from archaeal rod-like viruses. Display omitted •We present the first atomic structure of an archaeal spindle-shaped virus•Spindle-shaped viruses have evolved from archaeal rod-shaped viruses•Hydrophobic interactions underlie the pleomorphism of spindle-shaped capsids Structural analysis of an archaea-specific virus reveals principles for how filamentous assemblies of hydrophobic proteins can readily accommodate changes in morphology relevant for virus evolution and potentially for contexts as diverse as eukaryotic membrane dynamics and intermediate filaments.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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