SARS-CoV-2 Genomic Diversity, Viral Proteins, and Clinical Symptoms Including Smell Loss
The study "SARS-CoV-2 population dynamics in immunocompetent individuals in a closed transmission chain shows genomic diversity over the course of infection" highlights that SARS-CoV-2 is not genetically static during infection. Even within a single infected individual, viral populations can accumulate mutations over time, creating a diverse collection of viral variants. Some of these mutations occur in proteins that influence viral replication, immune evasion, tissue tropism, and symptom development, potentially affecting disease severity and clinical manifestations such as loss of smell (anosmia). Key SARS-CoV-2 Proteins and Their Functions NSP5 (Non-Structural Protein 5) Function: NSP5, also known as the Main Protease (Mpro or 3CLpro), is essential for viral replication. It cleaves large viral polyproteins (pp1a and pp1ab) into functional proteins required for the virus to reproduce. Importance: Because NSP5 is indispensable for viral maturation, it has become a major t...