NOVEL CHELATOR AND USE THEREOF

摘要

The present invention relates to dimeric pentadentate chelators with exceptionally strong binding of metal ions, for detection, immobilization and purification of biomolecules. Dimeric chelators offer a cooperativity of binding of two adjacent immobilized metal ions simultaneously to a histidine-tagged biomolecule, which gives advantageous properties regarding strength of binding compared to a corresponding monomer chelator. In addition, a dimer increases the selectivity (ease of separation) against non-tagged biomolecules with low metal-ion affinity. The dimeric pentadentate chelator according to the invention has the following general formula: wherein Sc is a scaffold or a connecting structure that contains at least two functional groups enabling coupling of two pentadentate chelators (PD), and PD is a pentadentate chelator having the formula: