Abstract:
:Non-segmented negative-strand RNA viruses, such as measles, ebola and Newcastle disease viruses (NDV), encapsidate viral genomic RNAs into helical nucleocapsids, which serve as the template for viral replication and transcription. Here, the clam-shaped nucleocapsid structure, where the NDV viral genome is sequestered, was determined at 4.8 Å resolution by cryo-electron microscopy. The clam-shaped structure is composed of two single-turn spirals packed in a back-to-back mode. This tightly packed structure functions as a seed for the assembly of a nucleocapsid from both directions, facilitating the growth of double-headed filaments with two separate RNA strings inside. Disruption of this structure by mutations in its loop interface yielded a single-headed unfunctional filament.
journal_name
Elifejournal_title
eLifeauthors
Song X,Shan H,Zhu Y,Hu S,Xue L,Chen Y,Ding W,Niu T,Gu J,Ouyang S,Shen QT,Liu ZJdoi
10.7554/eLife.45057subject
Has Abstractpub_date
2019-07-10 00:00:00issn
2050-084Xpii
45057journal_volume
8pub_type
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