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TitleStructure and its transformation of elliptical nege-like virus Tanay virus.
Journal, issue, pagesJ Gen Virol, Vol. 104, Issue 6, Year 2023
Publish dateJun 14, 2023
AuthorsKenta Okamoto / Chihong Song / Han Wang / Miako Sakaguchi / Christina Chalkiadaki / Naoyuki Miyazaki / Takeshi Nabeshima / Kouichi Morita / Shingo Inoue / Kazuyoshi Murata /
PubMed AbstractNegeviruses that infect insects are recently identified virus species that are phylogenetically related to several plant viruses. They exhibit a unique virion structure, an elliptical core with a ...Negeviruses that infect insects are recently identified virus species that are phylogenetically related to several plant viruses. They exhibit a unique virion structure, an elliptical core with a short projection. Negeviruses encode two structural proteins, a glycoprotein that forms a short projection, and an envelope protein that forms an elliptical core. The glycoprotein has been reported only in the negeviruses' genes, and not in phylogenetically related plant viruses' genes. In this report, we first describe the three-dimensional electron cryo-microscopy (cryo-EM) structure of Tanay virus (TANAV), one of the nege-like viruses. TANAV particle demonstrates a periodical envelope structure consisting of three layers surrounding the centred viral RNA. The elliptical core dynamically changes its shape under acidic and even low detergent conditions to form bullet-like or tubular shapes. The further cryo-EM studies on these transformed TANAV particles reveal their overall structural rearrangement. These findings suggest putative geometries of TANAV and its transformation in the life cycle, and the potential importance of the short projection for enabling cell entry to the insect hosts.
External linksJ Gen Virol / PubMed:37309998
MethodsEM (single particle)
Resolution23.6 Å
Structure data

EMDB-16440: C1 reconstruction of Tanay virus particle
Method: EM (single particle) / Resolution: 23.6 Å

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