Rice ragged stunt oryzavirus genome segments S7 and S10 encode non-structural proteins of M r 68 025 (Pns7) and M r 32 364 (Pns10)

Rice ragged stunt oryzavirus genome segments S7 and S10 encode non-structural proteins of M r 68... The nucleotide sequences of genome segments S7 and S10 of a Thai-isolate of rice ragged stunt virus (RRSV) were determined. The 1 938 bp S7 sequence contains a single large open reading frame (ORF) spanning nucleotides 20 to 1 843 that is predicted to encode a protein of M r 68 025. The 1 162 bp S10 sequence has a major ORF spanning nucleotides 142 to 1 032 that is predicted to encode a protein of M r 32 364. This S10 ORF is preceded by a small ORF (nt 20–55) which is probably a minicistron. Coupled in vitro transcription-translation from the two major ORFs gave protein products of the expected sizes. However, no protein was visualised from S10 when the small ORF sequence was included. Proteins were expressed in Escherichia coli from the full length ORF of S7 (P7) and from a segment of the S10 ORF (P10) fused to the ORF of glutathione S-transferase (GST). Neither fusion protein was recognised by polyclonal antibodies raised against RRSV particles. Furthermore, polyclonal antibodies raised against GST-P7 fusion protein did not recognise any virion structural polypeptides. These data strongly suggest that the proteins P7 and P10 do not form part of RRSV particle. This is further supported by observed sequence homology (though very weak) of predicted RRSV P7 and P10 with those of rice dwarf virus (RDV) non-structural proteins Pns6 and Pns9, respectively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Rice ragged stunt oryzavirus genome segments S7 and S10 encode non-structural proteins of M r 68 025 (Pns7) and M r 32 364 (Pns10)

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Publisher
Springer-Verlag
Copyright
Copyright © Wien by 1997 Springer-Verlag/
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050050193
Publisher site
See Article on Publisher Site

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