Unknown

Dataset Information

0

Mechanism for coordinated RNA packaging and genome replication by rotavirus polymerase VP1.


ABSTRACT: Rotavirus RNA-dependent RNA polymerase VP1 catalyzes RNA synthesis within a subviral particle. This activity depends on core shell protein VP2. A conserved sequence at the 3' end of plus-strand RNA templates is important for polymerase association and genome replication. We have determined the structure of VP1 at 2.9 A resolution, as apoenzyme and in complex with RNA. The cage-like enzyme is similar to reovirus lambda3, with four tunnels leading to or from a central, catalytic cavity. A distinguishing characteristic of VP1 is specific recognition, by conserved features of the template-entry channel, of four bases, UGUG, in the conserved 3' sequence. Well-defined interactions with these bases position the RNA so that its 3' end overshoots the initiating register, producing a stable but catalytically inactive complex. We propose that specific 3' end recognition selects rotavirus RNA for packaging and that VP2 activates the autoinhibited VP1/RNA complex to coordinate packaging and genome replication.

SUBMITTER: Lu X 

PROVIDER: S-EPMC2602806 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature

altmetric image

Publications

Mechanism for coordinated RNA packaging and genome replication by rotavirus polymerase VP1.

Lu Xiaohui X   McDonald Sarah M SM   Tortorici M Alejandra MA   Tao Yizhi Jane YJ   Vasquez-Del Carpio Rodrigo R   Nibert Max L ML   Patton John T JT   Harrison Stephen C SC  

Structure (London, England : 1993) 20081101 11


Rotavirus RNA-dependent RNA polymerase VP1 catalyzes RNA synthesis within a subviral particle. This activity depends on core shell protein VP2. A conserved sequence at the 3' end of plus-strand RNA templates is important for polymerase association and genome replication. We have determined the structure of VP1 at 2.9 A resolution, as apoenzyme and in complex with RNA. The cage-like enzyme is similar to reovirus lambda3, with four tunnels leading to or from a central, catalytic cavity. A distingu  ...[more]

Similar Datasets

| S-EPMC6697194 | biostudies-literature
| S-EPMC3067766 | biostudies-literature
| S-EPMC3540981 | biostudies-literature
| S-EPMC230270 | biostudies-other
| S-EPMC6486738 | biostudies-literature
| S-EPMC6498067 | biostudies-literature
| S-EPMC3147971 | biostudies-literature
| S-EPMC3021031 | biostudies-literature
| S-EPMC6340032 | biostudies-other
| S-EPMC7173133 | biostudies-literature