Background:

Pantoprazole is an inhibitor of H+/K+-ATPase [1].

Pantoprazole inhibits the activity of H+/K+-ATPase proton pumb in the parietal cells of gastric mucosa. This inhibition affects the acid secretion and thus, pantoprazole are used as drugs for the treatment of various acid-related disorders. Pantoprazole is activated slowly. The activated sulfonamide of pantoprazole binds to Cys813 and Cys822 of the pumb and inhibits acid secretion selectively. Pantoprazole inhibited lysosomal acidification with IC50 value of 194 μM. The pKa values of pantoprazole are 3.83 (pKa1) and 0.11 (pKa2). Besides that, pantoprazole also shows antibacterial effects on Helicobacter pylori [1, 2].

参考文献:
[1] Jungnickel P W.  Pantoprazole: a new proton pump inhibitor. Clinical therapeutics, 2000, 22(11): 1268-1293.
[2] Sachs G, Shin J M, Howden C W.  Review article: the clinical pharmacology of proton pump inhibitors. Alimentary pharmacology & therapeutics, 2006, 23(s2): 2-8.