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Virus manipulation of the ubiquitin–proteasome system has become increasingly apparent. Ubiquitin is a 76 amino acid protein that is post-translationally conjugated to target proteins, while poly-ubiquitination subsequently leads to degradation via the 26S proteasome. Target specificity is determined by a large family of ubiquitin ligases. Poxviruses encode p28, a highly conserved ubiquitin ligase...
Many cellular processes are regulated by the ubiquitin–proteasome system. Therefore, it is not surprising that viruses have adapted ways to manipulate the ubiquitin–proteasome system to their own advantage. p28 is a poxvirus encoded ubiquitin ligase that contains an N-terminal KilA-N DNA binding domain and a C-terminal RING domain required for ubiquitin ligase activity. p28 is encoded by a wide range...
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