Determination of the transglycosidation activity of NAD+ glycohydrolases with 4-(2′-alkyl-sulfanyl-vinyl)-pyridine derivatives generating chromophoric NAD+ analogs
The base exchange of nicotinamide with pyridine derivatives 1a–5a, catalyzed by pig brain NAD+ glycohydrolase and ADP-ribosyl cyclase from Aplysia californica, generated the corresponding NAD+ analogs 1b–5b. These analogs exhibited a high absorbance band in the visible region. The transglycosidation rate was determined by monitoring the absorbance increase. Among the tested derivatives,(E)-4-[2-(methylsulfanyl)-vinyl]- ...