Nuclear targeting of the cauliflower mosaic virus coat protein.

Abstract:

:The entry of the viral genomic DNA of cauliflower mosaic virus into the nucleus is a critical step of viral infection. We have shown by transient expression in plant protoplasts that the viral coat protein (CP), which is processed from the product of open reading frame IV, contains an N-terminal nuclear localization signal (NLS). The NLS is exposed on the surface of the virion and is thus available for interaction with a putative NLS receptor. Phosphorylation of the matured CP did not influence the nuclear localization of the protein but improved protein stability. Mutation of the NLS completely abolished viral infectivity, thus indicating its importance in the virus life cycle. The NLS seems to be regulated by the N terminus of the precapsid, which inhibits its nuclear targeting. This regulation could be important in allowing virus assembly in the cytoplasm.

journal_name

J Virol

journal_title

Journal of virology

authors

Leclerc D,Chapdelaine Y,Hohn T

doi

10.1128/JVI.73.1.553-560.1999

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

553-60

issue

1

eissn

0022-538X

issn

1098-5514

journal_volume

73

pub_type

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