Abstract:
:Rice tungro bacilliform virus (RTBV) is a plant pararetrovirus and a member of the Caulimoviridae family and closely related to viruses in the Badnavirus genus. The coat protein of RTBV is part of the large polyprotein encoded by open reading frame 3 (ORF3). ORF3 of an RTBV isolate from Malaysia was sequenced (accession no. AF076470) and compared with published sequences for the region that encodes the coat protein or proteins. Molecular mass of virion proteins was determined by mass spectrometry (matrix-assisted laser desorption/ionization-TOF) performed on purified virus particles from three RTBV isolates from Malaysia. The N- and C-terminal amino acid sequences of the coat protein were deduced from the mass spectral analysis, leading to the conclusion that purified virions contain a single coat protein of 37 kDa. The location of the coat protein domain in ORF3 was reinforced as a result of immunodetection reactions using antibodies raised against six different segments of ORF3 using Western immunoblots after SDS-PAGE and isoelectrofocusing of proteins purified from RTBV particles. These studies demonstrate that RTBV coat protein is released from the polyprotein as a single coat protein of 37 kDa.
journal_name
Virologyjournal_title
Virologyauthors
Marmey P,Bothner B,Jacquot E,de Kochko A,Ong CA,Yot P,Siuzdak G,Beachy RN,Fauquet CMdoi
10.1006/viro.1998.9519subject
Has Abstractpub_date
1999-01-20 00:00:00pages
319-26issue
2eissn
0042-6822issn
1096-0341pii
S0042-6822(98)99519-8journal_volume
253pub_type
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