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Virus-Like Particles of a Fish Nodavirus Display a Capsid Subunit Domain Organization Different from That of Insect Nodaviruses
Tang, Liang Lin, Chan-Shing Krishna, Neel K. Yeager, Mark Schneemann, Anette Johnson, John E.
Tang, Liang
Lin, Chan-Shing
Krishna, Neel K.
Yeager, Mark
Schneemann, Anette
Johnson, John E.
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Abstract
The structure of recombinant virus-like particles of malabaricus grouper nervous necrosis virus (MGNNV), a fish nodavirus isolated from the grouper Epinephelus malabaricus, was determined by electron cryomicroscopy (cryoEM) and three-dimensional reconstruction at 23-Å resolution. The cryoEM structure, sequence comparison, and protein fold recognition analysis indicate that the coat protein of MGNNV has two domains resembling those of tomato bushy stunt virus and Norwalk virus, rather than the expected single-domain coat protein of insect nodaviruses. The analysis implies that residues 83 to 216 fold as a β-sandwich which forms the inner shell of the T=3 capsid and residues 217 to 308 form the trimeric surface protrusions observed in the cryoEM map. The structural similarities between fish nodaviruses and members of the tombusvirus and calicivirus groups provide significant new data for understanding the evolution of the nodavirus family.
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This is the publisher's version, also available electronically from "http://jvi.asm.org".
Date
2002-06-01
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American Society for Microbiology
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Tang, L., Lin, C., Krishna, N., Yeager, M., Schneemann, A., & Johnson, J. (2002). Virus-Like Particles of a Fish Nodavirus Display a Capsid Subunit Domain Organization Different from That of Insect Nodaviruses. Journal of Virology, 76(12), 6370-6375. http://www.dx.doi.org/10.1128/JVI.76.12.6370-6375.2002