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Functional Linkers Support Targeting of Multivalent Tweezers to Taspase1.

Katrin Hommel1, Alisa-Maite A Kauth2, Abbna Kirupakaran3

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Researchers developed novel supramolecular ligands targeting Taspase 1, a protease linked to cancer. These functionalized ligands, utilizing aggregation-induced emission (AIE) and calix[4]arene scaffolds, achieved nanomolar binding affinities and potent inhibition of Taspase 1.

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Area of Science:

  • Biochemistry
  • Medicinal Chemistry
  • Chemical Biology

Background:

  • Taspase 1 is a crucial protease in development and a target in cancers.
  • Its flexible active site loop presents a challenge and opportunity for drug development.
  • Supramolecular ligands offer a novel therapeutic strategy beyond traditional small molecules.

Purpose of the Study:

  • To design and synthesize novel functionalized supramolecular ligands for Taspase 1 targeting.
  • To explore the use of aggregation-induced emission (AIE) linkers for monitoring binding.
  • To investigate the impact of calix[4]arene scaffolds on ligand efficacy and binding.

Main Methods:

  • Synthesis of four AIE-equipped ligands with varying valencies.
  • Utilizing calix[4]arene scaffolds to pre-position binding units.
  • Assessing ligand binding affinities and proteolytic inhibition of Taspase 1.

Main Results:

  • Functionalized AIE linkers achieved nanomolar binding affinities for Taspase 1.
  • These ligands demonstrated efficient inhibition of Taspase 1 proteolytic activity.
  • The calix[4]arene backbone significantly enhanced the inhibitory potential of the ligands.

Conclusions:

  • Novel functionalized supramolecular ligands effectively target and inhibit Taspase 1.
  • AIE properties enable monitoring of ligand-protein interactions.
  • Calix[4]arene scaffolds contribute to improved ligand efficacy, highlighting linker-specific contributions.