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Identification of Trichoplusia ni ascovirus 2c virion structural proteins

¹ Department of Entomology, The Pennsylvania State University, 501 ASI Building, University Park, PA 16802, USA
² Department of Microbiology, 32 Pearson Hall, Miami University, Oxford, OH 45056, USA
³ Proteomics and Mass Spectrometry Core Facility, Huck Institutes of the Life Sciences, The Pennsylvania State University, 104 Chemistry Building, University Park, PA 16802, USA
⁴ Department of Biochemistry, Virginia Polytechnic Institute and State University, 111 Engel Hall, Blacksburg, VA 24061, USA

Correspondence
Liwang Cui
luc2{at}psu.edu

Ascoviruses are a family of insect viruses with circular, double-stranded DNA genomes. With the sequencing of the Trichoplusia ni ascovirus 2c (TnAV-2c) genome, the virion structural proteins were identified by using tandem mass spectrometry. From at least eight protein bands visible on a Coomassie blue-stained gel of TnAV-2c virion proteins, seven bands generated protein sequences that matched predicted open reading frames (ORFs) in the genome, i.e. ORFs 2, 43, 115, 141, 142, 147 and 153. Among these ORFs, only ORF153, encoding the major capsid protein, has been characterized previously.