A noncommutative combinatorial protein logic circuit controls cell orientation in nanoenvironments.

Area of Science:

• Biotechnology
• Molecular Engineering
• Cell Biology

Background:

• Single-protein devices offer promise for biological monitoring and modulation.
• Integrating sensing and logic into proteins is challenging due to complex allosteric networks.

Purpose of the Study:

• To engineer a protein device functioning as a noncommutative combinatorial logic circuit.
• To demonstrate reversible control over cell orientation using engineered protein logic.

Main Methods:

• Incorporated a rapamycin-sensitive sensor (uniRapR) and a blue light-responsive LOV2 domain into human Src kinase.
• Utilized protein localization to focal adhesions and Src kinase activity modulation.
• Analyzed cell migration dynamics and orientation relative to collagen nanolane fibers.

Main Results:

• The engineered protein device successfully performed logic operations based on rapamycin and blue light inputs.
• Rapamycin activated Src kinase, promoting focal adhesion localization and reducing cell migration.
• Blue light reversed these effects, enabling reversible control over cell orientation.

Conclusions:

• The developed protein device functions as an intelligent nanoscale computing agent.
• This framework allows for precise, reversible control of cell orientation, with potential applications in tissue engineering and regenerative medicine.