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Differences in Interactions Within Viral Replication Complexes of SARS-CoV-2 (COVID-19) and SARS-CoV Coronaviruses Control RNA Replication Ability.


ABSTRACT: COVID-19 has become a global pandemic caused by the SARS-CoV-2 coronavirus. SARS-CoV-2 shares many similarities with SARS coronavirus (SARS-CoV). A viral replication complex containing non-structural proteins (nsps) is the toolbox for RNA replication and transcription of both coronaviruses. In both cases, the RNA-dependent RNA polymerase (RdRp) domain of the coronaviral replication complex dictates the primary polymerase activity by cooperating with cofactors. The higher transmissibility and mortality due to SARS-CoV-2 are related to its higher RNA replication activity compared to SARS-CoV. The discrepancy between the RNA replication efficiency of SARS-CoV and SARS-CoV-2 can be understood by exploring interactions within their viral replication complexes. Our modeling of molecular interactions within the viral replication complexes of SARS-CoV and SARS-CoV-2 using molecular dynamics simulations suggests that in contrast to SARS-CoVnsp12, SARS-CoV2nsp12 prefers helices as the dominant interacting secondary motifs. The relative differences in nonbonded interactions between nsps could suggest viral RNA replication ability in coronaviruses.

Supplementary information

The online version contains supplementary material available at 10.1007/s11837-021-04662-6.

SUBMITTER: Faisal HMN 

PROVIDER: S-EPMC8061462 | biostudies-literature |

REPOSITORIES: biostudies-literature

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