ArticleMethods in molecular biology (Clifton, N.J.)2023
Estimating the Interaction Strength Between PTS1-Peptides and Their Receptor PEX5 in Living Cells Using Flow-Cytometer-Based FRET (flowFRET) Measurements.
Article in Methods in molecular biology (Clifton, N.J.), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The import of many peroxisomal matrix proteins is initiated by the interaction of type-1 peroxisomal targeting signals (PTS1) residing at the extreme C-terminus of cargo proteins and their receptor protein PEX5. This interaction has been amply investigated by biophysical methods using isolated proteins and peptides or heterologous systems such as two-hybrid assays. However, a recently developed novel application of Fluorescence resonance energy transfer (FRET) allows a quantifying measurement of this interaction in living cells. This method combines the systematic measurement of FRET-efficiency in a high number of cells with a well-suited normalization protocol and a fitting algorithm, which together allow the estimation of numerical values for the apparent interaction strength that correlates with other measures of binding strength but can be obtained under rather physiological conditions.
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