<p>ADP-ribosylation is a posttranslational modification of proteins involving the addition of one or more ADP-ribose moieties [<cite idref="PUB00053863"/>, <cite idref="PUB00053864"/>]. These reactions are involved in cell signaling and the control of many cell processes, including DNA repair and apoptosis [<cite idref="PUB00053865"/>, <cite idref="PUB00053866"/>]. </p><p>This entry represents an ADP-ribosyltransferase domain found in various proteins, including bacterial and viral toxins.</p> ADP ribosyltransferase