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TitleUncoating Mechanism of Carnation Mottle Virus Revealed by Cryo-EM Single Particle Analysis.
Journal, issue, pagesSci Rep, Vol. 5, Page 14825, Year 2015
Publish dateOct 7, 2015
AuthorsChun-Yan Wang / Qin-Fen Zhang / Yuan-Zhu Gao / Li Xie / Hong-Mei Li / Jian Hong / Chuan-Xi Zhang /
PubMed AbstractGenome uncoating is a prerequisite for the successful infection of plant viruses in host plants. Thus far, little is known about the genome uncoating of the Carnation mottle virus (CarMV). Here, we ...Genome uncoating is a prerequisite for the successful infection of plant viruses in host plants. Thus far, little is known about the genome uncoating of the Carnation mottle virus (CarMV). Here, we obtained two reconstructions of CarMV at pH7 in the presence (Ca-pH7) and absence (EDTA-pH7) of calcium ions by Cryo-EM single particle analysis, which achieved 6.4 Å and 8 Å resolutions respectively. Our results showed that chelation of the calcium ions under EDTA-pH7 resulted in reduced interaction between the subunits near the center of the asymmetric unit but not overall size change of the viral particles, which indicated that the role of the calcium ions in CarMV was not predominantly for the structural preservation. Part of the genomic RNA closest to the capsid was found to be located near the center of the asymmetric unit, which might result from the interaction between genomic RNA and Lys194 residues. Together with the electrostatic potential analysis on the inner surface of the asymmetric unit, the reduced interaction near the center of the asymmetric unit under EDTA-pH7 suggested that the genome release of CarMV might be realized through the center of the asymmetric unit.
External linksSci Rep / PubMed:26442593 / PubMed Central
MethodsEM (single particle)
Resolution6.4 - 8.0 Å
Structure data

EMDB-6468:
Uncoating Mechanism of Carnation Mottle Virus Revealed by Cryo-EM Single Particle Analysis
Method: EM (single particle) / Resolution: 6.4 Å

EMDB-6469:
Uncoating Mechanism of Carnation Mottle Virus Revealed by Cryo-EM Single Particle Analysis
Method: EM (single particle) / Resolution: 8.0 Å

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