Literature DB >> 18981418

Infectious myonecrosis virus has a totivirus-like, 120-subunit capsid, but with fiber complexes at the fivefold axes.

Jinghua Tang1, Wendy F Ochoa, Robert S Sinkovits, Bonnie T Poulos, Said A Ghabrial, Donald V Lightner, Timothy S Baker, Max L Nibert.   

Abstract

Infectious myonecrosis virus (IMNV) is an emerging pathogen of penaeid shrimp in global aquaculture. Tentatively assigned to family Totiviridae, it has a nonsegmented dsRNA genome of 7,560 bp and an isometric capsid of the 901-aa major capsid protein. We used electron cryomicroscopy and 3D image reconstruction to examine the IMNV virion at 8.0-A resolution. Results reveal a totivirus-like, 120-subunit T = 1 capsid, 450 A in diameter, but with fiber complexes protruding a further 80 A at the fivefold axes. These protrusions likely mediate roles in the extracellular transmission and pathogenesis of IMNV, capabilities not shared by most other totiviruses. The IMNV structure is also notable in that the genome is centrally organized in five or six concentric shells. Within each of these shells, the densities alternate between a dodecahedral frame that connects the threefold axes vs. concentration around the fivefold axes, implying certain regularities in the RNA packing scheme.

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Year:  2008        PMID： 18981418      PMCID： PMC2582295          DOI： 10.1073/pnas.0806724105

Source DB:  PubMed          Journal:  Proc Natl Acad Sci U S A        ISSN： 0027-8424            Impact factor:   11.205


  29 in total

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Journal:  J Virol       Date:  2002-12       Impact factor: 5.103

4.  Early steps in reovirus infection are associated with dramatic changes in supramolecular structure and protein conformation: analysis of virions and subviral particles by cryoelectron microscopy and image reconstruction.

Authors:  K A Dryden; G Wang; M Yeager; M L Nibert; K M Coombs; D B Furlong; B N Fields; T S Baker
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5.  Fungal virus capsids, cytoplasmic compartments for the replication of double-stranded RNA, formed as icosahedral shells of asymmetric Gag dimers.

Authors:  R H Cheng; J R Caston; G J Wang; F Gu; T J Smith; T S Baker; R F Bozarth; B L Trus; N Cheng; R B Wickner
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8.  Nodavirus coat protein imposes dodecahedral RNA structure independent of nucleotide sequence and length.

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  20 in total

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Review 2.  Mycoviruses: future therapeutic agents of invasive fungal infections in humans?

Authors:  W W J van de Sande; J R Lo-Ten-Foe; A van Belkum; M G Netea; B J Kullberg; A G Vonk
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5.  Three-dimensional asymmetric reconstruction of tailed bacteriophage.

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6.  Virion structure of baboon reovirus, a fusogenic orthoreovirus that lacks an adhesion fiber.

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7.  Cryo-electron Microscopy Structure, Assembly, and Mechanics Show Morphogenesis and Evolution of Human Picobirnavirus.

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Review 8.  3D structures of fungal partitiviruses.

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9.  Structure of a protozoan virus from the human genitourinary parasite Trichomonas vaginalis.

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10.  Three-dimensional structure of victorivirus HvV190S suggests coat proteins in most totiviruses share a conserved core.

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