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Non-structural proteins and RNAs of alfalfa mosaic virus synthesized in tobacco and cowpea protoplasts.

Abstract：

:Three proteins, reacting specifically with sera raised against synthetic peptides identical to C-terminal amino acid sequences in alfalfa mosaic virus (AIMV) proteins P1, P2, and P3 translated in vitro from the AIMV RNAs 1, 2, and 3, respectively, were for the first time observed in tobacco and cowpea protoplasts. Part of P2 is post-translationally modified in protoplasts, because the anti-P2 serum reacted also with a protein migrating slower than P2 itself. The modification reported for P3 in infected tobacco leaves (T. Godefroy-Colburn et al. (1986) J. Gen. Virol. 67, 2233-2241) was observed in AIMV-infected bean leaves but not in AIMV-infected protoplasts and is apparently not essential for viral replication. Time course experiments showed that all nonstructural proteins could be detected 6 hr postinoculation. The two largest proteins P1 and P2 disappeared when virus production had reached a plateau, while the smallest nonstructural protein P3 remained at a constant level. Cell fractionation experiments showed that minus-strand RNA as well as all viral-encoded proteins were found in the 1000 g subcellular fraction. This location differs from the location of the nonstructural proteins in infected tobacco leaves (A. Berna et al. (1986) J. Gen. Virol. 67, 1135-1147).

journal_name

Virology

journal_title

Virology

authors

van Pelt-Heerschap H,Verbeek H,Huisman MJ,Sue Loesch-Fries L,Van Vloten-Doting L

doi

10.1016/0042-6822(87)90185-1

subject

Has Abstract

pub_date

1987-11-01 00:00:00

pages

190-7

issue

1

eissn

0042-6822

issn

1096-0341

pii

0042-6822(87)90185-1

journal_volume

161

pub_type

杂志文章

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