Dynamics of filamentous viral RNPs prior to egress.

Abstract:

:The final step in the maturation of paramyxoviruses, orthomyxoviruses and viruses of several other families, entails the budding of the viral nucleocapsid through the plasma membrane of the host cell. Many medically important viruses, such as influenza, parainfluenza, respiratory syncytial virus (RSV) and Ebola, can form filamentous particles when budding. Although filamentous virions have been previously studied, details of how viral filaments bud from the plasma membrane remain largely unknown. Using molecular beacon (MB)-fluorescent probes to image the viral genomic RNA (vRNA) of human RSV (hRSV) in live Vero cells, the dynamics of assembled viral filaments was observed to consist of three primary types of motion prior to egress from the plasma membrane: (i) filament projection and rotation, (ii) migration and (iii) non-directed motion. In addition, from information gained by imaging the 3D distribution of cellular vRNA, observing and characterizing vRNA dynamics, imaging vRNA/Myosin Va colocalization, and studying the effects of cytochalasin D (actin depolymerizing agent) exposure, a model for filamentous virion egress is presented.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Santangelo PJ,Bao G

doi

10.1093/nar/gkm246

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

3602-11

issue

11

eissn

0305-1048

issn

1362-4962

pii

gkm246

journal_volume

35

pub_type

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