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Journal of General Virology (2002), 83, 1777-1781.
© 2002 Society for General Microbiology

Plant

RNA 2 of Citrus psorosis virus is of negative polarity and has a single open reading frame in its complementary strand

María Eugenia Sánchez de la Torre1, Carmelo López2, Oscar Grau1 and María Laura García1

Instituto de Bioquímica y Biología Molecular, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115–1900 La Plata, Argentina1
Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Spain2

Author for correspondence: Oscar Grau. Fax +54 221 4259223. e-mail grau{at}biol.unlp.edu.ar

Citrus psorosis virus (CPsV) causes a citrus disease occurring worldwide. Isolate CPV 4 has a genome with three single-stranded RNAs. The complete sequence of RNA 2 (1643 nucleotides) is reported here. Northern blot hybridization with strand-specific probes showed that most of the encapsidated RNA 2 is of negative polarity, although a small amount of the complementary strand may also be present in particles. The RNA 2 complementary strand contained a single open reading frame encoding a protein of 476 amino acids, which includes a motif resembling a nuclear localization signal. The sequence of this putative protein shows no significant similarity to any other in the databases. In the 3'-terminal untranslated region there is a putative polyadenylation signal. No subgenomic RNAs derived from RNA 2 were detected.




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S. Martin, M. L. Garcia, A. Troisi, L. Rubio, G. Legarreta, O. Grau, D. Alioto, P. Moreno, and J. Guerri
Genetic variation of populations of Citrus psorosis virus.
J. Gen. Virol., October 1, 2006; 87(Pt 10): 3097 - 3102.
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