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The viral polymerase complex is crucial for both genome replication and transcription in non-segmented negative-strand RNA viruses. Here, the authors link varying structures of polymerase complexes with their dual functions and propose a sliding model for them to advance along the RNA templates.
The structure and function of polymerase dimers of non-segmented, negative-strand RNA viruses are poorly understood. Here, this study presents the structural basis for dimerization of a paramyxovirus L–P polymerase and its role in genome replication.
The Myoviridae cyanophage A-1(L) specifically infects the model cyanobacteria Anabaena sp. PCC 7120. Here, authors present the high-resolution cryo-EM structure of its intact tail machine, and identify multiple hydrolytic and binding modules.
Orthoreovirus σNS, essential for forming viral replication factories, has RNA chaperone activity that requires the association of σNS dimers into filamentous structures stabilized by domain-swapping interactions of the flexible N-terminal arms.
This study reveals that a cross-neutralizing antibody targets a conserved site on betacoronavirus spike proteins and confers protection against SARS-CoV-2 infection.
This study provides ultrastructural evidence that the HIV-1 capsid can enter the nucleus of an infected T cell line through the nuclear pore complex and fragments in the nucleoplasm to release the viral genome.