Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 127, Issue 8, Pages 2414-2416Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja0452166
Keywords
-
Categories
Ask authors/readers for more resources
Many phytopathogenic bacteria display lipopolysaccharides (LIPS) with the O-chain repeating unit [alpha-L-Rha-(1-->3)-alpha-L-Rha-(1-->3)-alpha-L-Rha-(1-->2)](n). This trisaccharide unit was synthesized and oligomerized to obtain hexa- and nonasaccharides. The deprotected rhamnans were effective in suppressing the hypersensitive response (HR) and in inducing PR-1 gene expression in Arabidopsis thaliana. Conformational analysis of the oligorhamnans by NMR spectroscopy and molecular dynamics calculations revealed that a coiled structure develops with increasing chain length of the oligosaccharide. This is associated with increasing efficacy in HR suppression and PR-1 gene expression. We therefore infer that the coiled structure of phytopathogenic bacteria is a plant-recognizable pathogen-associated molecular pattern (PAMP).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available