Noncovalent inhibition of the serine proteases, α-chymotrypsin and trypsin by trifluoro(organo)borates

Reem Smoum, Abraham Rubinstein*, Morris Srebnik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


A series of potassium organotrifluoroborates were synthesized. Their stability to hydrolysis was determined in D2O, TRIS and phosphate buffer. It was found that in both D2O and TRIS buffers, these compounds are quite stable, whereas in phosphate buffer rapid hydrolysis occurs. Based on these results, a study was undertaken to determine whether potassium organotrifluoroborates can serve as protease inhibitors. It was found that potassium organotrifluoroborates increased inhibition by at least an order of magnitude over the corresponding boronates. Dixon plots showed that these compounds are reversible competitive inhibitors of α-chymotrypsin and trypsin. Based on 19F NMR, we speculate that they inactivate the enzymes as a result of the formation of hydrogen-bonds between fluorine atoms of the inhibitors and the serine protease.

Original languageAmerican English
Pages (from-to)941-944
Number of pages4
JournalOrganic and Biomolecular Chemistry
Issue number5
StatePublished - 7 Mar 2005


Dive into the research topics of 'Noncovalent inhibition of the serine proteases, α-chymotrypsin and trypsin by trifluoro(organo)borates'. Together they form a unique fingerprint.

Cite this