3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose - - 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose Asp314 is located proximal to the 1''-O-linkage in substrates. Asp314 might protonate the leaving group (general acid), forming an oxocarbenium ion intermediate, and then activate the water (general base) for back-side attack. The W1 ligand of MgB can serve as the nucleophile attacking the anomeric C1'' of the ribose'' 754165 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose canonical enzyme catalytic mechanism, modelling, overview 732568 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose catalytic mechanism, modelling, overview 732351 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose catalytic mechanism, structure-function analysis, overview 732776 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose enzyme catalytic mechanism, overview 732714 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose enzyme DrPARG possesses endoglycohydrolase activity toward poly-ADP-ribose (PAR). DrPARG acts in both exo- and endo-glycohydrolase modes -, 754824 3.2.1.143 (ADP-ribose)n + H2O = (ADP-ribose)n-1 + ADP-ribose reaction mechanism and structure, overview 754168