Structures of active Hantaan virus polymerase uncover the mechanisms of Hantaviridae genome replication.

ABSTRACT: Hantaviruses are causing life-threatening zoonotic infections in humans. Their tripartite negative-stranded RNA genome is replicated by the multi-functional viral RNA-dependent RNA-polymerase. Here we describe the structure of the Hantaan virus polymerase core and establish conditions for in vitro replication activity. The apo structure adopts an inactive conformation that involves substantial folding rearrangement of polymerase motifs. Binding of the 5' viral RNA promoter triggers Hantaan virus polymerase reorganization and activation. It induces the recruitment of the 3' viral RNA towards the polymerase active site for prime-and-realign initiation. The elongation structure reveals the formation of a template/product duplex in the active site cavity concomitant with polymerase core wideni

SUBMITTER: Durieux Trouilleton Q 

PROVIDER: S-EPMC10206067 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature