Purification of resistance protein complexes using a biotinylated affinity (HPB) tag.

Yiping Qi, Fumiaki Katagiri

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Plant disease resistance (R) proteins confer strong resistance against pathogens by recognizing particular pathogen effectors. Identification of proteins associated with an R protein will provide insight into the mechanism of R protein function. Many R proteins are associated with the plasma membrane (PM) and expressed at low levels. Here, we describe a method to purify such low-abundance PM R protein -complexes from Arabidopsis using a biotinylated affinity tag, called the HPB tag. We have successfully applied this method to identify candidate components of the RPS2 resistance protein complex(es). This method should also be applicable to purification of other low-abundance PM protein complexes.

Original languageEnglish (US)
Pages (from-to)21-30
Number of pages10
JournalMethods in molecular biology (Clifton, N.J.)
StatePublished - Jun 15 2011


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