Preparation and verification of a monoclonal antibody against a conserved linear epitope in enterovirus A protein 2C.

Enterovirus A (EV-A) species are the main agents responsible for hand, foot, and mouth disease (HFMD), a serious public health concern. Lack of appropriate reagents prevents the mechanistic study of these virus infections. 2C protein, a non-structural protein of Enterovirus, is crucial for viral replication and antiviral immunity. Here, preparation and testing of a monoclonal antibody by immunizing mice with Coxsackievirus A10 protein 2C (CVA10-2C) was reported. This antibody could identify most EV-A types, both conventional and unconventional groups. We also mapped the antibody epitope SLATGIIARA, which is highly conserved in EV-A species and located in the ATPase domain. Some key amino acids include G140, I141, I142, and R144. In conclusion, we generated a recombinant monoclonal antibody against multiple EVA types and confirmed its performance, which may facilitate the future study of Enterovirus A infection and many potential applications, such as the diagnosis of pathogen or the development of antiviral therapies.