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Updated: Mar 15, 2026
Real Time Measurements of Membrane Protein:Receptor Interactions Using Surface Plasmon Resonance SPR
Published on: November 29, 2014
Real-Time Surface Plasmon Resonance (SPR) for the Analysis of Interactions Between SUMO Traps and Mono- or PolySUMO
Wendy Xolalpa1, Manuel S Rodriguez2, Patrick England3,4
1Centro de Investigación sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, 62100, Cuernavaca, Morelos, Mexico.
Abstract:
Isolating endogenous SUMOylated proteins is a challenging task due to the high reversibility of this posttranslational modification. We have shown that SUMO traps are useful tools for the enrichment and isolation of proteins modified by SUMO in vitro and in vivo. To characterize the affinity and specificity of different SUMO chains for these traps, that are based on SUMO-interacting motifs, we have used real-time surface plasmon resonance (SPR), which allows a label-free analysis of protein/protein interactions. Here, a protocol to determine the affinities of multivalent SUMO traps for polySUMO chains or mono-SUMO molecules by SPR is presented.
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