Legionaminic acid and 4-epi-legionaminic acid are 5,7-diacetamido nonulosonic acids and are assumed to play a crucial role in the virulence of Legionella pneumophila, the causative agent of Legionnaires' disease. Moreover, they are ideal target motifs for the development of vaccines and pathogen detection. Herein, we present a versatile de novo synthesis of legionaminic acid and 4-epi-legionaminic acid. Starting
Biosynthesis of CMP-legionaminic acid from fructose-6-P
申请人:National Research Council of Canada
公开号:EP2379735B1
公开(公告)日:2015-08-12
Synthesis and identification in bacterial lipopolysaccharides of 5,7-diacetamido-3,5,7,9-tetradeoxy-d-glycero-d-galacto- and -d-glycero-d-talo-non-2-ulosonic acids
作者:Yury E. Tsvetkov、Alexander S. Shashkov、Yuriy A. Knirel、Ulrich Zähringer
DOI:10.1016/s0008-6215(01)00041-6
日期:2001.4
5,7-Diacetamido-3,5,7,9-tetradeoxy-D-glycero-D-galacto- and -D-glycero-D-talo-non-2-ulosonic acids were synthesized by condensation of 2,4-diacetamido-2,4,6-trideoxy-D-mannose with oxalacetic acid. Comparison of the H-1 and C-13 NMR data and the specific optical rotation values of these monosaccharides and the corresponding L-glycero-D-galacto and L-glycero-D-talo isomers synthesized earlier [Tsvetkov, Y. E.; Shashkov, A. S.; Knirel, Y. A.; Backinowsky, L. V.; Zahringer, U. Mendelera Commun. 2000, 90-92] with data of the natural compounds enabled the identification in bacterial lipopolysaccharides of derivatives of 5,7-diamino-3,5,7,9-tetradeoxy-D-glycerogalacto-non-2-ulosonic (legionaminic) acid and epimers of legionaminic acid at C-4 and C-8. (C) 2001 Elsevier Science Ltd. All rights reserved.