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Related Concept Videos

Cooperative Allosteric Transitions01:58

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
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Modulating protein activity using tethered ligands with mutually exclusive binding sites.

Alberto Schena1, Rudolf Griss1, Kai Johnsson1

  • 11] École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Avenue Forel 2, EPFL SB ISIC LIP BCH-4303, CH-1015 Lausanne, Switzerland [2] École Polytechnique Fédérale de Lausanne, Institute of Bioengineering, CH-1015 Lausanne, Switzerland [3] National Centre of Competence in Research in Chemical Biology, CH-1015 Lausanne, Switzerland.

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Summary

Researchers developed a novel method to control protein activity using synthetic ligands. This technique allows for precise on/off switching of protein functions by specific effector molecules, advancing biosensing and synthetic biology.

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Area of Science:

  • Biochemistry
  • Synthetic Biology
  • Molecular Biology

Background:

  • Controlling protein activity with external molecules is crucial for applications in biosensing and synthetic biology.
  • Existing methods for protein activity modulation often lack specificity or require complex engineering.

Purpose of the Study:

  • To develop a general method for switching protein activity on and off using specific effector molecules.
  • To create synthetic ligands capable of mediating effector-dependent protein modulation.

Main Methods:

  • Design of synthetic ligands with two mutually exclusive binding sites: one for the target protein and one for the effector molecule.
  • Tethering the synthetic ligand to the target protein to induce an intramolecular interaction.
  • Disruption of the ligand-protein interaction by the effector molecule to modulate protein activity.

Main Results:

  • Demonstrated a generalizable method for effector-controlled protein activity modulation.
  • Successfully engineered a luciferase system responsive to an effector protein.
  • Developed a human carbonic anhydrase whose activity is controlled by small molecules and proteins in vitro and in cellulo.
  • Created novel fluorescent and bioluminescent biosensors utilizing this control mechanism.

Conclusions:

  • The described method provides a versatile platform for designing switchable proteins.
  • This approach enables precise control over protein function, opening new avenues in molecular engineering and biological research.
  • The developed biosensors offer sensitive and specific detection capabilities for various applications.