Rotavirus nonstructural protein 2 (NSP2)

Rotavirus nonstructural protein 2 (NSP2) is a multifunctional protein essential for the replication cycle of rotaviruses, the leading cause of severe dehydrating diarrhea in children worldwide. NSP2 self-assembles into stable octamers that possess several enzymatic activities, including NTPase, RNA 5'-triphosphatase (RTPase), and RNA chaperone functions. These activities are critical for the formation of viroplasms—specialized cytoplasmic inclusions where viral RNA replication and early morphogenesis occur. By interacting with another nonstructural protein, NSP5, and binding to viral messenger RNAs, NSP2 facilitates the packaging of the segmented dsRNA genome and the transition of mRNA to double-stranded RNA. Due to its indispensable role in the viral life cycle and its unique enzymatic pocket, NSP2 is considered a highly promising target for the development of direct-acting antivirals. Research into small-molecule inhibitors aims to disrupt its enzymatic activity or its ability to form viroplasms, thereby arresting viral replication and reducing the severity of rotavirus-induced gastroenteritis.

Other names

Non-structural protein 2NSP2 proteinViroplasm-associated proteinNS35

Inhibition of NTPase activity, disruption of viroplasm formation, and interference with the RNA chaperone function required for viral genome replication and packaging.