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Taxonomic group: fungi / Ascomycota (Phylum: Ascomycota)
Host organism: Oryza sativa
Organ / tissue: cell wall
Associated disease: rice blast

Publication DOI: 10.4052/tigg.12.113
Journal NLM ID: 9425898
Correspondence: shibuya

abr.affrc.go.jp
Institutions: Department of Biotechnology, National Institute of Agrobiological Resources, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan, Department of Biotechnology, National Institute of Agrobiological Resources, Ministry of Agriculture, Forestry and Fisheries, Tsukuba, Japan

N-Acetylchitooligosaccharides (oligochitin, chitin oligosaccharides) of a specific size can act as potent elicitor signals for suspension-cultured rice cells as well as various plant cells which include many monocots and some dicots. We recently isolated and characterized a highly elicitor-active glucopentaose from the cell wall P-Glucan from rice blast disease fungus. The results indicated that rice and soybean cells recognize different structural units of fugal glucans as elicitor signals. Because this elicitor treatment can induce many defense reactions, it has been serving as an excellent model system for the study of the signal transduction cascade leading to the activation of defense-related genes. It is critically important to identify and characterize the receptor molecules which perceive the elicitor signal to clarify the whole signal transduction cascade. A 75 kDa chitin oligosaccharide binding protein in the plasma membrane of suspension-cultured rice cells was identified as a putative receptor for the elicitor and purified. Recent studies on the structure and function of the binding proteins for these oligosaccharide elicitors will provide a clue to understanding how these elicitors are perceived and transduced in rice and other plant cells and also how such recognition systems have evolved.

receptor, signal transduction, elicitor

Structure type: oligomer
Location inside paper: fig. 1A
Contained glycoepitopes: IEDB_1397514,IEDB_141806,IEDB_142488,IEDB_146664,IEDB_153543,IEDB_158555,IEDB_241101,IEDB_983931,SB_192

Biological activity: induces the phytoalexin biosynthesis in suspension-cultured rice cells
Comments, role: review

NCBI Taxonomy refs (TaxIDs): 318829, 148305
Reference(s) to other database(s): GTC:G19376WE
Show glycosyltransferases

There is only one chemically distinct structure:

OC[C@H]1O[C@@H](O[C@@H]2[C@@H](O)[C@H](O[C@@H]3[C@@H](O)[C@H](O[C@@H]4[C@@H](O)[C@H](O)O[C@H](CO)[C@H]4O)O[C@H](CO[C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)[C@H]3O)O[C@H](CO)[C@H]2O)[C@H](O)[C@@H](O)[C@@H]1O

SVG MW SMILES 3D mol Ionize