pfam12252: SidE_PDE (This model is not part of the current CDD release)
SidE phosphodiesterase (PDE) domain
This entry represents the phosphodiesterase (PDE) domain found in the bacterial ubiquitinating enzymes, which belong to the SidE family. This domain catalyzes the conjugation of ADP-ribosylated ubiquitin (ADPR-Ub), previously synthesised by the mono-ADP-ribosyltransferase (mART) domain, to a serine residue on substrates to generate a protein-phosphoribosyl-Ub (PR-Ub) product. These pathogen proteins are secreted bacterial effector proteins, which are translocated inside the host cell using the Dot/Icm secretion system. The SidE family of enzymes carry out ubiquitination of host cell proteins in an E1/E2-independent manner.