1hne
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(New page: 200px<br /> <applet load="1hne" size="450" color="white" frame="true" align="right" spinBox="true" caption="1hne, resolution 1.84Å" /> '''STRUCTURE OF HUMAN ...)
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Revision as of 15:14, 12 November 2007
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STRUCTURE OF HUMAN NEUTROPHIL ELASTASE IN COMPLEX WITH A PEPTIDE CHLOROMETHYL KETONE INHIBITOR AT 1.84-ANGSTROMS RESOLUTION
Contents |
Overview
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.
Disease
Known diseases associated with this structure: Hematopoiesis, cyclic OMIM:[130130], Neutropenia, congenital OMIM:[130130]
About this Structure
1HNE is a Single protein structure of sequence from [1]. Active as Leukocyte elastase, with EC number 3.4.21.37 Full crystallographic information is available from OCA.
Reference
Structure of human neutrophil elastase in complex with a peptide chloromethyl ketone inhibitor at 1.84-A resolution., Navia MA, McKeever BM, Springer JP, Lin TY, Williams HR, Fluder EM, Dorn CP, Hoogsteen K, Proc Natl Acad Sci U S A. 1989 Jan;86(1):7-11. PMID:2911584
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