Peculiar protein-protein interactions of the novel endoplasmic reticulum membrane protein Rcr1 and ubiquitin ligase Rsp5
2007
Imai, K.(Tokyo Univ. (Japan)) | Noda, Y. | Adachi, H. | Yoda, K.
Overproduction of the ER membrane protein Rcr1 makes Saccharomyces cerevisiae resistant to Congo red by reducing the chitin content through a unknown mechanism. By both co-immunoprecipitation and yeast two-hybrid experiments, specific interaction between Rcr1 and the ubiquitin ligase Rsp5 was found. This binding was largely mediated by a singular VPEY sequence in Rcr1 in addition to PPSY, the consensus ligand motif of the WW domains. Mutant analysis indicated that Rsp5 and other Rcr1-interacting proteins discovered in the current screen were not engaged in Congo red resistance.
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