ADP-ribose glycohydrolase that hydrolyzes ADP-ribosyl-cysteine bonds (PubMed:33769608). Specifically reverses the SirTM-mediated mono-ADP-ribosylation of GcvH-L (SpyM50867), by releasing ADP-ribose from the target protein (PubMed:26166706). May be involved in the modulation of the response to host-derived oxidative stress (PubMed:26166706). 4-O-(ADP-D-ribosyl)-L-aspartyl-[protein] + H2O = ADP-D-ribose + H(+) + L-aspartyl-[protein] Interacts with the lipoylated form of GcvH-L.