Structure of human neutrophil elastase in complex with a peptide chloromethyl ketone inhibitor at 1.84-A resolution.Navia, M.A., McKeever, B.M., Springer, J.P., Lin, T.Y., Williams, H.R., Fluder, E.M., Dorn, C.P., Hoogsteen, K.
(1989) Proc.Natl.Acad.Sci.USA 86: 7-11
- PubMed: 2911584
- PubMed Abstract:
- Crystallization of Human Neutrophil Elastase
Williams, H.R.,Lin, T.-Y.,Navia, M.A.,Springer, J.P.,Mckeever, B.M.,Hoogsteen, K.,Dornjunior, C.P.
(1987) J.Biol.Chem. 262: 17178
Human neutrophil elastase (HNE) has been implicated as a major contributor to tissue destruction in various disease states, including emphysema. The structure of HNE, at neutral pH, in complex with methoxysuccinyl-Ala-Ala-Pro-Ala chloromethyl ketone ...
Human neutrophil elastase (HNE) has been implicated as a major contributor to tissue destruction in various disease states, including emphysema. The structure of HNE, at neutral pH, in complex with methoxysuccinyl-Ala-Ala-Pro-Ala chloromethyl ketone (MSACK), has been solved and refined to an R factor of 16.4% at 1.84-A resolution. Results are consistent with the currently accepted mechanism of peptide chloromethyl ketone inhibition of serine proteases, in that MSACK cross-links the catalytic residues His-57 and Ser-195. The structure of the HNE-MSACK complex is compared with that of porcine pancreatic elastase in complex with L-647,957, a beta-lactam inhibitor of both elastases. The distribution of positively charged residues on HNE is highly asymmetric and may play a role in its specific association with the underlying negatively charged proteoglycan matrix of the neutrophil granules in which the enzyme is stored.
Merck Sharp & Dohme Research Laboratories, Rahway, NJ 07065.