2FQI

dual binding modes of a novel series of DHODH inhibitors

Summary for 2FQI

• Entry DOI: 10.2210/pdb2fqi/pdb
• Related: 2BXV 2FPT 2FPV 2FPY
• Descriptor: Dihydroorotate dehydrogenase, mitochondrial, SULFATE ION, ACETATE ION, ... (7 entities in total)
• Functional Keywords: protein inhibitor complex, oxidoreductase
• Biological source: Homo sapiens (human)
• Cellular location: Mitochondrion inner membrane; Single-pass membrane protein: Q02127
• Total number of polymer chains: 1
• Total formula weight: 44665.07

Authors

Baumgartner, R.,Leban, J. (deposition date: 2006-01-18, release date: 2007-01-23, Last modification date: 2023-08-30)

Primary citation

Baumgartner, R.,Walloschek, M.,Kralik, M.,Gotschlich, A.,Tasler, S.,Mies, J.,Leban, J.
Dual binding mode of a novel series of DHODH inhibitors.
J.Med.Chem., 49:1239-1247, 2006

PubMed Abstract: Human dihydroorotate dehydrogenase (DHODH) represents an important target for the treatment of hyperproliferative and inflammatory diseases. In the cell DHODH catalyzes the rate-limiting step of the de novo pyrimidine biosynthesis. DHODH inhibition results in beneficial immunosuppressant and antiproliferative effects in diseases such as rheumatoid arthritis. Here, we present high-resolution X-ray structures of human DHODH in complex with a novel class of low molecular weight compounds that inhibit the enzyme in the nanomolar range. Some compounds showed an interesting dual binding mode within the same cocrystal strongly depending on the nature of chemical substitution. Measured in vitro activity data correlated with the prevailing mode of binding and explained the observed structure-activity relationship. Additionally, the X-ray data confirmed the competitive nature of the inhibitors toward the putative ubiquinone binding site and will guide structure-based design and synthesis of molecules with higher activity.

PubMed: 16480261
DOI: 10.1021/jm0506975

Experimental method

X-RAY DIFFRACTION (1.95 Å)