Mutations in the potyvirus helper component protein: effects on interactions with virions and aphid stylets
S Blanc, ED Ammar, S Garcia-Lampasona, VV Dolja, C Llave, J Baker and TP Pirone Department of Plant Pathology, University of Kentucky, Lexington 40546, USA. Mutations of K --> E in the highly conserved 'KITC' motif of the potyvirus helper component (HC) protein result in loss of HC func...
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Published in | Journal of general virology Vol. 79; no. 12; pp. 3119 - 3122 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
Soc General Microbiol
01.12.1998
Microbiology Society |
Subjects | |
Online Access | Get full text |
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Summary: | S Blanc, ED Ammar, S Garcia-Lampasona, VV Dolja, C Llave, J Baker and TP Pirone
Department of Plant Pathology, University of Kentucky, Lexington 40546, USA.
Mutations of K --> E in the highly conserved 'KITC' motif of the
potyvirus helper component (HC) protein result in loss of HC function in
aphid transmission, presumably because of inability to interact with
virions, stylets or both. In this study we show that HC of potato virus C
(PVC), a naturally occurring variant of potato virus Y (PVY) that has the K
--> E mutation, lacks the ability to be retained in stylets, whereas PVY
HC is retained. The K --> E mutation in either PVC or a site-directed
mutant of tobacco etch virus (TEV) did not hinder binding to capsid
protein, nor did deletion of the N-terminal 107 aa of TEV HC. An additional
mutation, F -->, L at aa 10 of TEV HC, which renders HC non-functional
but does not affect binding to capsid protein, is reported. Collectively,
the results suggest that the N-terminal domain is required for interaction
of HC with stylets rather than for binding to virions. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0022-1317 1465-2099 |
DOI: | 10.1099/0022-1317-79-12-3119 |