19F nuclear magnetic resonance studies of the interaction of inhibitors with chymotrypsin. Ring-fluorinated derivatives of N-trifluoroacetylphenylalanine
- 1 January 1978
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 31 (10) , 2179-2186
- https://doi.org/10.1071/ch9782179
Abstract
The complexes formed between chymotrypsin and the doubly fluorine- labelled inhibitors, o-, m- and p-fluoro-N-trifluoroacetyl-D- phenylalanine and 2,4-difluoro-N-trifluoroacetyl-D-phenylalanine, have been characterized by 19F N.M.R. spectroscopy and binding parameters, ΔB and KI, have been derived. The results confirm the importance of the amido binding site in orienting aromatic amino acids at the active site of chymotrypsin. Changes in ΔB, the change in chemical shift of the enzyme-bound inhibitor, are shown to be a very sensitive probe of enzyme-inhibitor interactions.Keywords
This publication has 1 reference indexed in Scilit:
- Nuclear magnetic resonance studies of p-fluorocinnamate-.alpha.-chymotrypsin complexesJournal of the American Chemical Society, 1977