Activities of proteasome and m-calpain are essential for Chikungunya virus replication

Replication of many viruses is dependent on the ubiquitin proteasome system. The present study demonstrates that Chikungunya virus replication increases proteasome activity and induces unfolded protein response (UPR) in cultured cells. Further, it was seen that the virus replication was dependent on the activities of proteasomes and m-calpain. Proteasome inhibition induced accumulation of polyubiquitinated proteins and earlier visualization of UPR.