Determinants of affinity and proteolytic stability in interactions of Kunitz family protease inhibitors with mesotrypsin.
Salameh, M.A., Soares, A.S., Navaneetham, D., Sinha, D., Walsh, P.N., Radisky, E.S.(2010) J Biol Chem 285: 36884-36896
- PubMed: 20861008 
- DOI: 10.1074/jbc.M110.171348
- Primary Citation of Related Structures:  
3L33, 3L3T - PubMed Abstract: 
An important functional property of protein protease inhibitors is their stability to proteolysis. Mesotrypsin is a human trypsin that has been implicated in the proteolytic inactivation of several protein protease inhibitors. We have found that bovine pancreatic trypsin inhibitor (BPTI), a Kunitz protease inhibitor, inhibits mesotrypsin very weakly and is slowly proteolyzed, whereas, despite close sequence and structural homology, the Kunitz protease inhibitor domain of the amyloid precursor protein (APPI) binds to mesotrypsin 100 times more tightly and is cleaved 300 times more rapidly ...