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Probing the subpockets of factor Xa reveals two binding modes for inhibitors based on a 2-carboxyindole scaffold: a study combining structure-activity relationship and X-ray crystallography.

Abstract：

:Structure-activity relationships within a series of highly potent 2-carboxyindole-based factor Xa inhibitors incorporating a neutral P1 ligand are described with particular emphasis on the structural requirements for addressing subpockets of the factor Xa enzyme. Interactions with the subpockets were probed by systematic substitution of the 2-carboxyindole scaffold, in combination with privileged P1 and P4 substituents. Combining the most favorable substituents at the indole nucleus led to the discovery of a remarkably potent factor Xa inhibitor displaying a K(i) value of 0.07 nM. X-ray crystallography of inhibitors bound to factor Xa revealed substituent-dependent switching of the inhibitor binding mode and provided a rationale for the SAR obtained. These results underscore the key role played by the P1 ligand not only in determining the binding affinity of the inhibitor by direct interaction but also in modifying the binding mode of the whole scaffold, resulting in a nonlinear SAR.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Nazaré M,Will DW,Matter H,Schreuder H,Ritter K,Urmann M,Essrich M,Bauer A,Wagner M,Czech J,Lorenz M,Laux V,Wehner V

doi

10.1021/jm0490540

keywords:

subject

Has Abstract

pub_date

2005-07-14 00:00:00

pages

4511-25

issue

14

eissn

0022-2623

issn

1520-4804

journal_volume

48

pub_type

杂志文章

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