Lettuce infectious yellows virus (LIYV) RNA 1-encoded P34 is an RNA-binding protein and exhibits perinuclear localization.

Abstract:

:The Crinivirus, Lettuce infectious yellows virus (LIYV) has a bipartite, positive-sense ssRNA genome. LIYV RNA 1 encodes replication-associated proteins while RNA 2 encodes proteins needed for other aspects of the LIYV life cycle. LIYV RNA 1 ORF 2 encodes P34, a trans enhancer for RNA 2 accumulation. Here we show that P34 is a sequence non-specific ssRNA-binding protein in vitro. P34 binds ssRNA in a cooperative manner, and the C-terminal region contains the RNA-binding domain. Topology predictions suggest that P34 is a membrane-associated protein and the C-terminal region is exposed outside of the membrane. Furthermore, fusions of P34 to GFP localized to the perinuclear region of transfected protoplasts, and colocalized with an ER-specific dye. This localization was of interest since LIYV RNA 1 replication (with or without P34 protein) induced strong ER rearrangement to the perinuclear region. Together, these data provide insight into LIYV replication and possible functions of P34.

journal_name

Virology

journal_title

Virology

authors

Wang J,Stewart LR,Kiss Z,Falk BW

doi

10.1016/j.virol.2010.04.006

subject

Has Abstract

pub_date

2010-07-20 00:00:00

pages

67-77

issue

1

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(10)00241-2

journal_volume

403

pub_type

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