A point mutation in the coat protein abolishes aphid transmissibility of a potyvirus.

Abstract:

:A nonaphid transmissible (NAT) variant of tobacco vein mottling virus (TVMV) was used to test the hypothesis that the viral coat protein (CP) plays a role in determining aphid transmissibility. Comparison of the nucleotide sequences in the coat protein cistron of an aphid transmissible isolate (TVMV-AT) with that of TVMV-NAT revealed a single nucleotide difference (G----A) at position 8445; this alters a single amino acid residue (G----E) at position 2747. A cDNA fragment representing the CP region of TVMV-NAT was substituted into the CP region of a full-length cDNA clone of TVMV-AT, and transcribed RNA was inoculated to tobacco plants. Aphids were unable to transmit the resultant hybrid virus which had the TVMV-NAT coat protein, although the concentration and infectivity of the hybrid virus in the source plants were similar to those of TVMV-AT. This is the first direct demonstration that a CP mutation affects aphid transmissibility of a potyvirus.

journal_name

Virology

journal_title

Virology

authors

Atreya CD,Raccah B,Pirone TP

doi

10.1016/0042-6822(90)90389-9

subject

Has Abstract

pub_date

1990-09-01 00:00:00

pages

161-5

issue

1

eissn

0042-6822

issn

1096-0341

journal_volume

178

pub_type

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