期刊
MICROBIAL DRUG RESISTANCE
卷 26, 期 4, 页码 385-390出版社
MARY ANN LIEBERT, INC
DOI: 10.1089/mdr.2019.0144
关键词
biosynthesis pathway of GDP-6-deoxy-alpha-d-manno-heptose; nucleotide-activated heptose; Yersinia pseudotuberculosis; yersiniosis; electrospray ionization mass spectroscopy
资金
- Basic Science Research Programs [2018R1D1A1B07050781, 2018R1D1A1B07050942]
- National Research Foundation of Korea
- Ministry of Education, Science, and Technology (MEST), Republic of Korea
The GDP-6-deoxy-alpha-d-manno-heptose is a key building block molecule in constructing lipopolysaccharide of Gram-negative bacteria. Therefore, blockage of the biosynthesis pathway of GDP-6-deoxy-alpha-d-manno-heptose is lethal or increases antibiotics susceptibility to pathogens. In this study, we assayed d-glycero-alpha-d-manno-heptose-1-phosphate guanylyltransferase (HddC) from Yersinia pseudotuberculosis (Yp) using an efficient assay method supplying its natural substrate. Using the method, 102 chemical compounds were tested to search inhibitory compounds and electrospray ionization mass spectrometry was used to detect the HddC from Y. pseudotuberculosis (YpHddC) reaction product, GDP-d-glycero-alpha-d-manno-heptose. Interestingly, one promising lead, ethyl 5-({[(5-benzyl-1, 3, 4-oxadiazol-2-yl) thio] acetyl} amino)-4-cyano-3-methyl-2-thiophenecarboxylate (Chembridge 7929959), was discovered. The inhibitory activity of the lead compound against YpHddC has been proven by blocking its nucleotidyltransferase activity transferring the GMP moiety to alpha-d-mannose-1-phosphate (alpha M1P). Chembridge 7929959 shows that the half maximal inhibitory concentration (IC50) is 0.222 mu M indicating its affinity with alpha M1P.
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