Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) and equine arteritis virus are two major members of the arterivirus family. PRRSV, a leading swine pathogen, causes reproductive failure in breeding stock and respiratory tract illness in young pigs. Due to the lack of a suitable vaccine or effective drug treatment and the quick spread of these viruses, infected animals either die quickly or must be culled. PRRSV costs the swine industry around $644 million annually in the United States and almost €1.5 billion in Europe every year. To find a way to combat these viruses, we focused on the essential viral nonstructural protein 11 (nsp11). nsp11 is associated with multiple functions, such as RNA processing and suppression of the infected host innate immunity system. The three structures solved in this study provide new insight into the molecular mechanisms of this crucial protein family and will benefit the development of new treatments against these deadly viruses.
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