3.5.1.78 glutathionylspermidine + H2O - 3.5.1.78 additional information bifunctional enzyme that catalyzes the ATP-dependent formation and hydrolysis of glutathionylspermidine, a conjugate of glutathione and spermidine. Proteins YgiC and YjfC, encoded by genes ygiC and yjfC, show ATPase activity, but are not glutathionylspermidine synthetases