The natural history of ADP-ribosyltransferases and the ADP ribosylation system -- Identification and Analysis of ADP-ribosylated Proteins -- Photorhabdus luminescens toxins TccC3 and TccC5: Insecticidal ADP-ribosyltransferases that modify threonine and glutamine -- Reaction mechanism of mono-ADP-ribosyltransferase based on structures of the complex of enzyme and substrate protein -- Regulation of nitrogenase by reversible mono-ADP-ribosylation -- ADP-ribosylation of P2X7: a matter of life and death for regulatory T cells and natural killer T cells -- Pierisins and CARP-1: ADP-ribosylation of DNA by ARTCs in butterflies and shellfish -- Comparative structural analysis of the putative mono-ADP-ribosyltransferases of the ARTD/PARP family -- Function and regulation of the mono-ADP-ribosyltransferase ARTD10 -- Regulation of nucleocytoplasmic transport by ADP-ribosylation: the emerging role of karyopherin-β1 mono-ADP-ribosylation by ARTD15.