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The Interaction of Proline-Rich Ligands with Profilin Probed with an Enzyme-Linked Immunosorbent AssayDepartment of Medical Protein Research, VIB, Ghent, Belgium, Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
Department of Medical Protein Research, VIB, Ghent, Belgium, Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
Department of Medical Protein Research, VIB, Ghent, Belgium, Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
Department of Medical Protein Research, VIB, Ghent, Belgium, Anja.lambrechts{at}ugent.be, Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium To detect interactions of different proline-rich ligands with profilins, the authors developed a simple analytical antibody-based screening method. Profilin I or profilin IIa was coated in microplates, and ligand binding was monitored via antibody detection. Using purified components, the authors show that the assay is very sensitive as nanomolar concentrations of recombinant profilin ligands can be used. They further apply this technique to detect interaction of profilin with various proline-rich partners, either endogenously present or ectopically expressed as tagged fusions, using lysates. With this assay, the authors identify Shootin1 as a novel profilin IIa partner. In addition, they demonstrate that this assay can be used for studying competition or ternary complex formation. In conclusion, they developed a sensitive, easy-to-use, and versatile method for the study of the interaction between profilin and different ligands. (Journal of Biomolecular Screening 2009:350-359)
Key Words: profilin isoforms poly(L-proline) Ena/VASP proteins mDia SH3 domain Shootin1
Journal of Biomolecular Screening, Vol. 14, No. 4,
350-359 (2009) |
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