1LPK

CRYSTAL STRUCTURE OF FXA IN COMPLEX WITH 125.

DOI: 10.2210/pdb1LPK/pdb

Classification: HYDROLASE
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 2002-05-08 Released: 2003-05-08
Deposition Author(s): Schreuder, H.A., Loenze, P., Brachvogel, V., Liesum, A.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.20 Å
R-Value Free: 0.280
R-Value Work: 0.192

wwPDB Validation3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Design and Quantitative Structure-Activity relationship of 3-amidinobenzyl-1H-indole-2-carboxamides as potent, nonchiral, and selective inhibitors of blood coagulation factor Xa

Matter, H., Defossa, E., Heinelt, U., Blohm, P.M., Schneider, D., Mueller, A., Herok, S., Schreuder, H.A., Liesum, A., Brachvogel, V., Loenze, P., Walser, A., Al-Obeidi, F., Wildgoose, P.

(2002) J Med Chem 45: 2749-2769

PubMed: 12061878 Search on PubMed
DOI: 10.1021/jm0111346
Primary Citation of Related Structures:
1LPK, 1LPG, 1LPZ, 1LQE, 1LQD

PubMed Abstract:

A series of 138 nonchiral 3-amidinobenzyl-1H-indole-2-carboxamides and analogues as inhibitors of the blood coagulation enzyme factor Xa (fXa) were designed, synthesized, and investigated by X-ray structure analysis and 3D quantitative structure-activity relationship (QSAR) studies (CoMFA, CoMSIA) in order to identify important protein-ligand interactions responsible for biological affinity and selectivity. Several compounds from this series are highly potent and selective inhibitors of this important enzyme linking extrinsic and intrinsic coagulation pathways. To rationalize biological affinity and to provide guidelines for further design, all compounds were docked into the factor Xa binding site. Those docking studies were based on X-ray structures of factor Xa in complex with literature-known inhibitors. It was possible to validate those binding modes by four X-ray crystal structures of representative ligands in factor Xa, while one ligand was additionally crystallized in trypsin to rationalize requirements for selective factor Xa inhibition. The 3D-QSAR models based on a superposition rule derived from these docking studies were validated using conventional and cross-validated r(2) values using the leave-one-out method and repeated analyses using two randomly chosen cross-validation groups plus randomization of biological activities. This led to consistent and highly predictive 3D-QSAR models with good correlation coefficients for both CoMFA and CoMSIA, which were found to correspond to experimentally determined factor Xa binding site topology in terms of steric, electrostatic, and hydrophobic complementarity. Subsets selected as smaller training sets using 2D fingerprints and maximum dissimilarity methods resulted in 3D-QSAR models with remarkable correlation coefficients and a high predictive power. The final quantitative SAR information agrees with all experimental data for the binding topology and thus provides reasonable activity predictions for novel factor Xa inhibitors.

Organizational Affiliation:

Aventis Pharma Deutschland GmbH, DI&A, Molecular Modeling, Building G 878, D-65926 Frankfurt am Main, Germany. hans.matter@aventis.com

Macromolecules

Find similar proteins by:

(by identity cutoff) | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Blood coagulation factor Xa	A	134	Homo sapiens	Mutation(s): 0 Gene Names: F10 EC: 3.4.21.6
Find proteins for P00742 (Homo sapiens) Explore P00742 Go to UniProtKB: P00742
NIH Common Fund Data Resources
PHAROS P00742 GTEx ENSG00000126218
Protein Feature View Expand
( Mouse scroll to zoom / Hold left click to move ) Reference Sequence

Find similar proteins by:

(by identity cutoff) | Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Blood coagulation factor Xa	B	254	Homo sapiens	Mutation(s): 0 Gene Names: F10 EC: 3.4.21.6
Find proteins for P00742 (Homo sapiens) Explore P00742 Go to UniProtKB: P00742
NIH Common Fund Data Resources
PHAROS P00742 GTEx ENSG00000126218
Protein Feature View Expand
( Mouse scroll to zoom / Hold left click to move ) Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CBB Query on CBB Download CCD File	B	1-(3-CARBAMIMIDOYL-BENZYL)-1H-INDOLE-2-CARBOXYLIC ACID 3-CARBAMIMIDOYL-BENZYLESTER C₂₅ H₃₁ N₅ O₂ SDPCOHPMBQGZNR-RLLQIKCJSA-N		Ligand Interaction
CA Query on CA Download CCD File	B	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Ligand Interaction