Abstract:
:Rotavirus, a cause of pediatric gastroenteritis, has a genome consisting of 11 segments of double-stranded (ds)RNA surrounded by a triple-layered protein capsid. The rotavirus RNA-dependent RNA polymerase, VP1, synthesizes both dsRNA and plus-strand RNA (+RNA) within subviral particles. Structural analyses of the rotavirus capsid and polymerase, combined with functional studies of purified capsid proteins, indicate that the inner capsid protein controls the initiation of RNA synthesis by VP1. Whether VP1 directs dsRNA versus +RNA synthesis may be regulated by the impact of the viral RNA capping enzyme on the position of the polymerase plug, a flexible element that inserts into one of the polymerase's RNA exit tunnels. This review discusses recent findings and ideas into the mechanisms used by rotavirus capsid proteins to control the activities of its viral polymerase and to coordinate RNA synthesis with the assembly of virus particles.
journal_name
Curr Opin Viroljournal_title
Current opinion in virologyauthors
Gridley CL,Patton JTdoi
10.1016/j.coviro.2014.08.008subject
Has Abstractpub_date
2014-12-01 00:00:00pages
31-8eissn
1879-6257issn
1879-6265pii
S1879-6257(14)00174-6journal_volume
9pub_type
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