Respiratory syncytial virus replication complex

The "Respiratory syncytial virus replication complex" refers specifically to the multi-protein complex responsible for genome replication and transcription in human respiratory syncytial virus (RSV), a negative-sense RNA virus causing severe respiratory infections, particularly in infants and the elderly[1][4][5][7][10]. The respiratory syncytial virus replication complex is a multi-subunit protein assembly critical for the life cycle of RSV by catalyzing both transcription and replication of the viral RNA genome[1][4][7][10]. The core of the complex is composed of the large protein (L), which contains RNA-dependent RNA polymerase, capping, and methyltransferase activities, and the phosphoprotein (P), which acts as a cofactor and scaffolding protein[5][7][10]. The complex also interacts with the nucleocapsid protein (N), which encapsidates the viral genome RNA, and with cofactors such as M2-1 for transcriptional processivity[3]. This dynamic multiprotein machinery orchestrates the synthesis of viral mRNA and replication of the viral genome, with coordinated rearrangements to facilitate stage-specific functions[1][3][10]. The complex is the prime target for direct-acting antiviral drugs in RSV infection, with several polymerase inhibitors and drugs disrupting its assembly or enzymatic activities in development[4][7][10]. Targeting this complex aims to halt viral RNA synthesis and shut down infection progression. Resistance can result from mutations in L or P proteins, highlighting the need for robust antiviral strategies. If greater specificity is required (e.g., "RSV L/P polymerase complex"), the entry could be refined to that level, but the above captures the therapeutic target defined in research and drug discovery as the "RSV replication complex."

Other names

RSV polymerase complexRSV ribonucleocapsid complexRSV L/P complexRSV RdRp complex (less specific)RSV replication/transcription complex

Inhibition of RNA-dependent RNA polymerase activity, Inhibition of viral RNA synthesis (via nucleoside or non-nucleoside polymerase inhibition), Disruption of protein-protein interactions within the complex, Interference with capping or methylation of viral mRNA[7][10]