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Updated: May 3, 2026

An Optimized Single-Molecule Pull-Down Assay for Quantification of Protein Phosphorylation
Published on: June 6, 2022
Single-molecule site-specific detection of protein phosphorylation with a nanopore
Christian B Rosen1, David Rodriguez-Larrea2, Hagan Bayley3
11] Department of Chemistry, University of Oxford, Oxford, UK. [2] Center for DNA Nanotechnology, Department of Chemistry and iNANO, Aarhus University, Aarhus, Denmark. [3].
Abstract:
We demonstrate single-molecule, site-specific detection of protein phosphorylation with protein nanopore technology. A model protein, thioredoxin, was phosphorylated at two adjacent sites. Analysis of the ionic current amplitude and noise, as the protein unfolds and moves through an α-hemolysin pore, enables the distinction between unphosphorylated, monophosphorylated and diphosphorylated variants. Our results provide a step toward nanopore proteomics.
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