Changes in interactions in complexes of hirudin derivatives and human alpha-thrombin due to different crystal forms.Priestle, J.P., Rahuel, J., Rink, H., Tones, M., Grutter, M.G.
(1993) Protein Sci. 2: 1630-1642
- PubMed: 8251938
- DOI: 10.1002/pro.5560021009
- Primary Citation of Related Structures:
- PubMed Abstract:
- Crystal Structure of the Thrombin-Hirudin Complex: A Novel Mode of Serine Protease Inhibition
Gruetter, M.G.,Priestle, J.P.,Rahuel, J.,Grossenbacher, H.,Bode, W.,Hofsteenge, J.,Stone, S.R.
(1990) Embo J. 9: 2361
- The Refined 1.9 Angstrom Crystal Structure of Human Alpha Thrombin: Interaction with D-Phe-Pro-Arg Chloromethylketone and Significance of the Tyr-Pro-Pro-Trp Insertion Segment
Bode, W.,Mayr, I.,Baumann, U.,Huber, R.,Stone, S.R.,Hofsteenge, J.
(1989) Embo J. 8: 3467
- Structure of the Hirugen and Hirulog Complexes of Alpha-Thrombin
Skrzypczak-Jankun, E.,Carperos, V.E.,Ravichandran, K.G.,Tulinsky, A.
(1991) J.Mol.Biol. 221: 1379
- Refined Structure of the Hirudin-Thrombin Complex
Rydel, T.J.,Tulinsky, A.,Bode, W.,Huber, R.
(1991) J.Mol.Biol. 221: 583
The three-dimensional structures of D-Phe-Pro-Arg-chloromethyl ketone-inhibited thrombin in complex with Tyr-63-sulfated hirudin (ternary complex) and of thrombin in complex with the bifunctional inhibitor D-Phe-Pro-Arg-Pro-(Gly)4-hirudin (CGP 50,856 ...
The three-dimensional structures of D-Phe-Pro-Arg-chloromethyl ketone-inhibited thrombin in complex with Tyr-63-sulfated hirudin (ternary complex) and of thrombin in complex with the bifunctional inhibitor D-Phe-Pro-Arg-Pro-(Gly)4-hirudin (CGP 50,856, binary complex) have been determined by X-ray crystallography in crystal forms different from those described by Skrzypczak-Jankun et al. (Skrzypczak-Jankun, E., Carperos, V.E., Ravichandran, K.G., & Tulinsky, A., 1991, J. Mol. Biol. 221, 1379-1393). In both complexes, the interactions of the C-terminal hirudin segments of the inhibitors binding to the fibrinogen-binding exosite of thrombin are clearly established, including residues 60-64, which are disordered in the earlier crystal form. The interactions of the sulfate group of Tyr-63 in the ternary complex structure explain why natural sulfated hirudin binds with a 10-fold lower K(i) than the desulfated recombinant material. In this new crystal form, the autolysis loop of thrombin (residues 146-150), which is disordered in the earlier crystal form, is ordered due to crystal contacts. Interactions between the C-terminal fragment of hirudin and thrombin are not influenced by crystal contacts in this new crystal form, in contrast to the earlier form. In the bifunctional inhibitor-thrombin complex, the peptide bond between Arg-Pro (P1-P1') seems to be cleaved.
Department of Biotechnology, Ciba-Geigy Ltd., Basel, Switzerland.