Purification of Resistance Protein Complexes Using a Biotinylated Affinity (HPB) Tag

  • Yiping Qi
  • Fumiaki Katagiri
Part of the Methods in Molecular Biology book series (MIMB, volume 712)


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.

Key words

Arabidopsis R protein Plasma membrane HPB tag Biotinylation Protein complexes 



This work was supported by a grant from the National Science Foundation (Arabidopsis 2010 grant number IOB-0419648) to F.K. and a PBS Doctoral Dissertation Fellowship from the University of Minnesota to Y.Q.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Plant BiologyUniversity of MinnesotaSt. PaulUSA

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