Development of C2-symmetric, active site-directed inhibitors for Cystathionine beta-Synthase

MEDI 68

Christopher D. McCune, cmccune1@bigred.unl.edu, Weijun Shen, wshen@unlserve.unl.edu, Woo Jin Chung, and David B. Berkowitz, dbb@unlserve.unl.edu. Department of Chemistry, University of Nebraska, 824 Hamilton Hall, Lincoln, NE 68588-0304
This presentation will highlight our efforts to develop new classes of inhibitors for the important human PLP-dependent enzyme, cystathionine beta-synthase (CBS). This enzyme is central to the transsulfuration pathway, whereby reduced sulfur equivalents are converted from dietary methionine into usable redox equivalents in the form of glutathione. CBS itself combines L-serine with L-homocysteine to give (L,L)-cystathionine, with release of a molecule of water. Our inhibitor design exploits the latent C2-symmetry inherent in the (L,L)-cystathionine enzymatic reaction product, as indicated in the figure. Streamlined syntheses have been developed for each inhibitor series, via a sequence that features modified Mitsunobu conditions and Grubbs cross metathesis, as key steps.

 

Poster Session
7:00 PM-9:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix

Division of Medicinal Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007