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2014 ; 426
(18
): 3148-3165
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Pathways for virus assembly around nucleic acids
#MMPMID25036288
Perlmutter JD
; Perkett MR
; Hagan MF
J Mol Biol
2014[Sep]; 426
(18
): 3148-3165
PMID25036288
show ga
Understanding the pathways by which viral capsid proteins assemble around their
genomes could identify key intermediates as potential drug targets. In this work,
we use computer simulations to characterize assembly over a wide range of capsid
protein-protein interaction strengths and solution ionic strengths. We find that
assembly pathways can be categorized into two classes, in which intermediates are
either predominantly ordered or disordered. Our results suggest that estimating
the protein-protein and the protein-genome binding affinities may be sufficient
to predict which pathway occurs. Furthermore, the calculated phase diagrams
suggest that knowledge of the dominant assembly pathway and its relationship to
control parameters could identify optimal strategies to thwart or redirect
assembly to block infection. Finally, analysis of simulation trajectories
suggests that the two classes of assembly pathways can be distinguished in
single-molecule fluorescence correlation spectroscopy or bulk time-resolved
small-angle X-ray scattering experiments.