Design of potential bisubstrate inhibitors against Mycobacterium tuberculosis (Mtb) 1-deoxy-d-xylulose 5-phosphate reductoisomerase (Dxr)—evidence of a novel binding mode
COMPOUNDS FOR INHIBITING 1-DEOXY-D-XYLULOSE-5-PHOSPHATE REDUCTOISOMERASE
申请人:Boshoff Helena I.
公开号:US20140378418A1
公开(公告)日:2014-12-25
In particular, the compound is effective to inhibit Dxr in
Mycobacterium tuberculosis
(Mtb). The present invention relates to compounds having general formula (I) or (II)
where X is an acidic group, such as carboxylate, phosphonate, sulfate, and tetrazole; Ar is a substituted or unsubstituted aromatic or heteroaromatic group; and n is 0, 1, 2, 3, or 4, preferably 2, 3, or 4. The compounds inhibits 1-deoxy-D-xylulose-5-phosphate reductoisomerase (Dxr), particularly Dxr in
Mycobacterium tuberculosis
(Mtb).
Design of potential bisubstrate inhibitors against Mycobacterium tuberculosis (Mtb) 1-deoxy-d-xylulose 5-phosphate reductoisomerase (Dxr)—evidence of a novel binding mode
作者:Géraldine San Jose、Emily R. Jackson、Eugene Uh、Chinchu Johny、Amanda Haymond、Lindsay Lundberg、Chelsea Pinkham、Kylene Kehn-Hall、Helena I. Boshoff、Robin D. Couch、Cynthia S. Dowd
DOI:10.1039/c3md00085k
日期:——
In most bacteria, the nonmevalonate pathway is used to synthesize isoprene units. Dxr, the second step in the pathway, catalyzes the NADPH-dependent reductive isomerization of 1-deoxy-D-xylulose-5-phosphate (DXP) to 2-C-methyl-D-erythritol-4-phosphate (MEP). Dxr is inhibited by natural products fosmidomycin and FR900098, which bind in the DXP binding site. These compounds, while potent inhibitors of Dxr, lack whole cell activity against Mycobacterium tuberculosis (Mtb) due to their polarity. Our goal was to use the Mtb Dxr-fosmidomycin co-crystal structure to design bisubstrate ligands to bind to both the DXP and NADPH sites. Such compounds would be expected to demonstrate improved whole cell activity due to increased lipophilicity. Two series of compounds were designed and synthesized. Compounds from both series inhibited Mtb Dxr. The most potent compound (8) has an IC50 of 17.8 μM. Analysis shows 8 binds to Mtb Dxr via a novel, non-bisubstrate mechanism. Further, the diethyl ester of 8 inhibits Mtb growth making this class of compounds interesting lead molecules in the search for new antitubercular agents.
DXR Inhibition by Potent Mono- and Disubstituted Fosmidomycin Analogues
作者:Anna M. Jansson、Anna Więckowska、Christofer Björkelid、Samir Yahiaoui、Sanjeewani Sooriyaarachchi、Martin Lindh、Terese Bergfors、Shyamraj Dharavath、Matthieu Desroses、Surisetti Suresh、Mounir Andaloussi、Rautela Nikhil、Sharma Sreevalli、Bachally R. Srinivasa、Mats Larhed、T. Alwyn Jones、Anders Karlén、Sherry L. Mowbray
DOI:10.1021/jm4006498
日期:2013.8.8
including Mycobacteriumtuberculosis and apicomplexan parasites, and differs from the classical mevalonate pathway that is essential in humans. Using a structure-based approach, we designed a number of analogues of fosmidomycin, including a series that are substituted in both the Cα and the hydroxamate positions. The latter proved to be a stable framework for the design of inhibitors that extend from the