Glycerophosphodiester phosphodiesterase domain of uncharacterized bacterial glycerophosphodiester phosphodiesterases
This subfamily corresponds to the glycerophosphodiester phosphodiesterase domain (GDPD) present in a group of uncharacterized bacterial glycerophosphodiester phosphodiesterase and similar proteins. They show high sequence similarity to Escherichia coli glycerophosphodiester phosphodiesterase, which catalyzes the degradation of glycerophosphodiesters to produce sn-glycerol-3-phosphate (G3P) and the corresponding alcohols.
Comment:The catalytic mechanism of glycerophosphodiester phosphodiesterases is based on the metal ion-dependent general acid-base reaction.
Comment:Based on structure evidence and site-directed mutagenesis of Thermoanaerobacter tengcongensis glycerophosphodiester phosphodiesterase, the catalytic site consists of two conserved histidine residues which serve as general acid and general base in catalyzing the hydrolysis of the 3'-5' phosphodiester bond.