X-ray structure of active site-inhibited clotting factor Xa. Implications for drug design and substrate recognition.Brandstetter, H., Kuhne, A., Bode, W., Huber, R., von der Saal, W., Wirthensohn, K., Engh, R.A.
(1996) J.Biol.Chem. 271: 29988-29992
- PubMed: 8939944
- Also Cited By: 1QB9, 1QBO, 1V3X, 1WU1
- PubMed Abstract:
- Structure of Human Des(1-45) Factor Xa at 2.2 A Resolution
Padmanabhan, K.,Padmanabhan, K.P.,Tulinsky, A.,Park, C.H.,Bode, W.,Huber, R.,Blankenship, D.T.,Cardin, A.D.,Kisiel, W.
(1993) J.Mol.Biol. 232: 947
- A Novel Factor Xa Inhibitor: Structure-Activity Relationships and Selectivity between Factor Xa and Thrombin
Katakura, S.,Nagahara, T.,Hara, T.,Iwamoto, M.
(1993) Biochem.Biophys.Res.Commun. 197: 965
- X-Ray Structure of Clotting Factor Ixa: Active Site and Module Structure Related to Xase Activity and Hemophilia B
Brandstetter, H.,Bauer, M.,Huber, R.,Lollar, P.,Bode, W.
(1995) Proc.Natl.Acad.Sci.USA 92: 9796
The 3.0-A resolution x-ray structure of human des-Gla-coagulation factor Xa (fXa) has been determined in complex with the synthetic inhibitor DX-9065a. The binding geometry is characterized primarily by two interaction sites: the naphthamidine group ...
The 3.0-A resolution x-ray structure of human des-Gla-coagulation factor Xa (fXa) has been determined in complex with the synthetic inhibitor DX-9065a. The binding geometry is characterized primarily by two interaction sites: the naphthamidine group is fixed in the S1 pocket by a typical salt bridge to Asp-189, while the pyrrolidine ring binds in the unique aryl-binding site (S4) of fXa. Unlike the large majority of inhibitor complexes with serine proteinases, Gly-216 (S3) does not contribute to hydrogen bond formation. In contrast to typical thrombin binding modes, the S2 site of fXa cannot be used by DX-9065a since it is blocked by Tyr-99, and the aryl-binding site (S4) of fXa is lined by carbonyl oxygen atoms that can accommodate positive charges. This has implications for natural substrate recognition as well as for drug design.
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