| Description | Deoxythymidine diphosphate-L-rhamnose (dTDP-L-rhamnose) is the precursor of L-rhamnose, a saccharide required for the virulence of some pathogenic bacteria. In gram-negative bacteria such as Salmonella enterica, Vibrio cholerae, or Escherichia coli 075:K5, L-rhamnose is an important residue in the O-antigen of lipopolysaccharides, which are essential for resistance to serum killing and colonization. In gram-positive bacteria such as streptococci, the capsule is a recognized virulence factor. For example, L-rhamnose is known to be present in the capsule of Streptococcus suis, a causative agent of meningitis in humans. In Streptococcus mutans, L-rhamnose containing polysaccharides have been implicated in tooth surface colonization and adherence to kidney, muscle, and heart tissues. In mycobacteria, L-rhamnose is fundamental to the structural integrity of the cell wall since it connects the inner peptidoglycan layer to the arabinogalactan polysaccharides. dTDP-L-rhamnose is synthesized from glucose-1-phosphate and deoxythymidine triphosphate (dTTP) via a pathway involving four distinct enzymes. Whereas common sugars such as glucose, fructose, and mannose are all D-configured, bacteria commonly utilize the L-configured carbohydrates in pharmacologically active compounds and their cell-wall structures. The bacterial cell wall is unique to bacteria; neither the cell wall nor the enzymes and chemical intermediates in its formation have analogues in humans. The enzymes involved in dTDP-L-rhamnose synthesis are potential targets for the design of new therapeutic agents (PMID: 10802738 , 12773151 ). |
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| InChI Identifier | InChI=1S/C16H26N2O15P2/c1-6-4-18(16(24)17-14(6)23)10-3-8(19)9(31-10)5-29-34(25,26)33-35(27,28)32-15-13(22)12(21)11(20)7(2)30-15/h4,7-13,15,19-22H,3,5H2,1-2H3,(H,25,26)(H,27,28)(H,17,23,24)/t7-,8-,9+,10+,11-,12+,13+,15+/m0/s1 |
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