Severe acute respiratory syndrome coronavirus 2 genomic RNA and subgenomic mRNAs (SARS-CoV-2 RNA) (SARS-CoV-2 RNA)

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genomic RNA (gRNA) is a positive-sense, single-stranded RNA molecule approximately 30 kb in length that functions as the primary genetic material of the virus (Wu et al., 2020, Nature). Upon entry into a host cell, the gRNA is translated to produce non-structural proteins that form the viral replicase-transcriptase complex, which then generates subgenomic mRNAs (sgmRNAs) for structural and accessory protein synthesis (V'kovski et al., 2021, Nature Reviews Microbiology). These RNA molecules are essential for every stage of the viral life cycle, including replication, transcription, and packaging into new virions. Because of its central role, the viral RNA is a major target for diagnostic testing and therapeutic intervention. Therapeutic strategies include the use of nucleoside analogs like Remdesivir and Molnupiravir that disrupt RNA synthesis, as well as sequence-specific approaches like antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs) designed to degrade the viral RNA or block its translation (Zhu et al., 2021, Signal Transduction and Targeted Therapy). Targeting conserved structural elements within the RNA, such as the 5' untranslated region or the pseudoknot involved in ribosomal frameshifting, remains a key focus for developing broad-spectrum antivirals (Lan et al., 2022, Nature Communications).

Other names

SARS-CoV-2 gRNASARS-CoV-2 sgmRNACOVID-19 viral RNASARS-CoV-2 genome

Inhibition of viral replication through premature RNA chain termination, induction of lethal mutagenesis (error catastrophe), or direct degradation/blocking via antisense and RNA interference mechanisms (NIH, 2023; Nature, 2020).