Structure of a hybrid squash inhibitor in complex with porcine pancreatic elastase at 1.8 A resolution.Ay, J., Hilpert, K., Krauss, N., Schneider-Mergener, J., Hohne, W.
(2003) Acta Crystallogr.,Sect.D 59: 247-254
- PubMed: 12554935
- PubMed Abstract:
- X-ray crystal structure of the complex of human leukocyte elastase (PMN elastase) and the third DOMAIN OF the turkey ovomucoid inhibitor
Bode, W.,Wei, A.Z.,Huber, R.,Meyer, E.,Travis, J.,Neumann, S.
(1986) Embo J. 5: 2453
- THE REFINED 2.0 ANGSTROMS X-RAY CRYSTAL STRUCTURE OF THE COMPLEX FORMED BETWEEN BOVINE BETA-TRYPSIN AND CMTI-I, A TRYPSIN INHIBITOR FROM SQUASH SEEDS (CUCURBITA MAXIMA). TOPOLOGICAL SIMILARITY OF THE SQUASH SEED INHIBITORS WITH THE CARBOXYPEPTIDASE A INHIBITOR FROM POTATOES
Bode, W.,Greyling, H.J.,Huber, R.,Otlewski, J.,Wilusz, T.
(1989) FEBS Lett. 242: 285
- Atomic Resolution Structure of native porcine pancreatic elastase at 1.1 A
Wurtele, M.,Hahn, M.,Hilpert, K.,Hohne, W.
(2000) Acta Crystallogr.,Sect.D 56: 520
The crystal structure of porcine pancreatic elastase in complex with a hybrid squash inhibitor (HEI-TOE I; 28 amino acids) has been determined to a resolution of 1.8 A. To construct the hybrid inhibitor, the trypsin-binding loop of the squash inhibit ...
The crystal structure of porcine pancreatic elastase in complex with a hybrid squash inhibitor (HEI-TOE I; 28 amino acids) has been determined to a resolution of 1.8 A. To construct the hybrid inhibitor, the trypsin-binding loop of the squash inhibitor from Ecballium elaterium was substituted by the sequence of a peptide that was derived from the third domain of the turkey ovomucoid inhibitor and was optimized to inhibit porcine pancreatic elastase. This modification of the squash inhibitor changed its specificity for trypsin to a specificity for porcine pancreatic elastase. Specific interactions of this hybrid inhibitor with porcine pancreatic elastase and the differences from the interactions of the ovomucoid inhibitor with human leukocyte elastase are discussed. The binding loop of the inhibitor adopts a 'canonical' conformation and the scissile bond Leu-Glu remains intact.
Institut für Biochemie, Universitätsklinikum Charité, Humboldt-Universität zu Berlin, Abteilung Proteinstrukturforschung, Monbijoustrasse 2, 10117 Berlin, Germany.