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Biochemistry 2003 Oct ; (40) :0
Rice C2-domain proteins are induced and translocated to the plasma membrane in response to a fungal elicitor.
Kim CY,   Koo YD,   Jin JB,   Moon BC,   Kang CH,   Kim ST,   Park BO,   Lee SY,   Kim ML,   Hwang I,   Kang KY,   Bahk JD,   Lee SY,   Cho MJ  

Abstract
Hundreds of proteins involved in signaling pathways contain a Ca(2+)-dependent membrane-binding motif called the C2-domain. However, no small C2-domain proteins consisting of a single C2-domain have been reported in animal cells. We have isolated two cDNA clones, OsERG1a and OsERG1b, that encode two small C2-domain proteins of 156 and 159 amino acids, respectively, from a fungal elicitor-treated rice cDNA library. The clones are believed to have originated from a single gene by alternative splicing. Transcript levels of the OsERG1 gene are dramatically elevated by a fungal elicitor prepared from Magnaporthe grisea or by Ca(2+) ions. The OsERG1 protein produced in Escherichia coli binds to phospholipid vesicles in a Ca(2+)-dependent manner and is translocated to the plasma membrane of plant cells by treatment with either a fungal elicitor or a Ca(2+) ionophore. These results suggest that OsERG1 proteins containing a single C2-domain are involved in plant defense signaling systems.

DHARA ID: D024277 Pubmed ID: 14529272


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