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RdRps can be used as drug targets for viral pathogens as their function is not necessary for eukaryotic survival. By inhibiting RdRp function, new RNAs cannot be replicated from an RNA template strand, however, DNA-dependent RNA polymerase remains functional. Some antiviral drugs against Hepatitis C and COVID-19 specifically target RdRp.
In molecular biology, RNA polymerase (abbreviated RNAP or RNApol), or more specifically DNA-directed/dependent RNA polymerase (DdRP), is an enzyme that catalyzes the chemical reactions that synthesize RNA from a DNA template.
Phylogeny of Orthornavirae RNA-dependent polymerase. The five colored branches are the five phyla of Orthornavirae.. Both kingdoms in Riboviria show a relation to the reverse transcriptases of group II introns that encode RTs and retrotransposons, which are self-replicating DNA sequences, the latter of which self-replicate via reverse transcription and integrate themselves into other parts of ...
HCV genome. Nonstructural protein 5B (NS5B) is a viral protein found in the hepatitis C virus (HCV). [1] It is an RNA-dependent RNA polymerase, having the key function of replicating HCV's viral RNA by using the viral positive RNA strand as a template to catalyze the polymerization of ribonucleoside triphosphates (rNTP) during RNA replication.
The viral RNA-dependent RNA polymerase (RdRp) can then proceed to transcribe positive-sense viral mRNA using the negative-sense viral RNA as a template. Cap-snatching also explains why some viral mRNA have 5’ terminal extensions of 10-20 nucleotides that are not encoded for in the genome.
Spiegelman's Monster is an RNA chain of only 218 nucleotides that is able to be reproduced by the RNA replication enzyme RNA-dependent RNA polymerase, also called RNA replicase. It is named after its creator, Sol Spiegelman, of the University of Illinois at Urbana-Champaign who first described it in 1965.
The RNA-dependent RNA polymerase that replicates both the positive and negative RNA strands is a complex of four proteins: the catalytic beta subunit (replicase, ) is encoded by the phage, while the other three subunits are encoded by the bacterial genome: alpha subunit (ribosomal protein S1), gamma subunit (), and delta subunit ().
RNA polymerase All RdDM DNA methylation of target loci Pol V is a plant-specific RNA polymerase complex and NRPE1, its largest subunit, is specific to the complex. Pol V transcribes non-coding RNAs that serve as scaffolds for several other RdDM components, most importantly the AGO-sRNA duplex, but also SPT5L, and the IDN2-IDP complex.