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  • Title: Analogues of the mycobacterial arabinogalactan linkage disaccharide as cell wall biosynthesis inhibitors.
    Author: Wen X, Crick DC, Brennan PJ, Hultin PG.
    Journal: Bioorg Med Chem; 2003 Aug 15; 11(17):3579-87. PubMed ID: 12901902.
    Abstract:
    The mycobacterial arabinogalactan linkage disaccharide [alpha-L-Rha-(1-->3)-alpha-D-GlcNAc] provides a basis for the design of new antitubercular drugs, since it supports a key skeletal structure in the bacterial cell wall. A series of analogues of the linker was synthesized by coupling appropriate thiorhamnosyl donors modified at their 4-positions, with an N-acetyl glucosamine acceptor. In a cell-free enzyme inhibition assay, three analogues inhibited the activity of the galactosyltransferase that adds a Galf residue to the linkage disaccharide. Although the compounds were modest inhibitors, these data confirm the viability of this approach to anti-mycobacterial agents. It is especially significant that the three effective compounds are modified at the site of the acceptor atom in the natural substrate.
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