Paramyxovirus ultrastructure and genome packaging: cryo-electron tomography of sendai virus.

ABSTRACT: Members of the Paramyxoviridae such as measles, mumps, and parainfluenza viruses have pleomorphic, enveloped virions that contain negative-sense unsegmented RNA genomes. This is encapsidated by multiple copies of a viral nucleocapsid protein N to form a helical ribonucleoprotein complex (termed the nucleocapsid), which acts as the template for both transcription and replication. Structure analysis of these viruses has proven challenging, owing to disordered regions in important constituent proteins, conformational flexibility in the nucleocapsid and the pleomorphic nature of virus particles. We conducted a low-resolution ultrastructural analysis of Sendai virus, a prototype paramyxovirus, using cryo-electron tomography. Virions are highly variable in size, ranging approximately from 110 to

SUBMITTER: Loney C 

PROVIDER: S-EPMC2715783 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature