Rotation Kinetics of Molecular Motors Influence Their Ability to Kill Cancer Cells and Induce Cellular Calcium...

Area of Science:

• Cellular mechanics
• Synthetic biology
• Biophysics

Background:

• Chemical agents are traditional tools for cell manipulation.
• Mechanical forces, often external, are crucial in cellular processes.
• Synthetic molecular motors (MMs) offer internal mechanical force application.

Purpose of the Study:

• Investigate structure-function relationships of MMs.
• Determine how MM functional groups affect biological outcomes.
• Explore MMs for cell death and calcium signaling applications.

Main Methods:

• Synthesized four MMs with varying functional groups (methyl, isopropyl, tert-butyl, phenyl).
• Utilized density functional theory (DFT) for rotation rate calculations.
• Assessed MM effectiveness in cell killing and calcium signaling.

Main Results:

• DFT calculations predicted rotation rates influenced by substituent size.
• Methylated MM exhibited the fastest rotation.
• The methylated MM was most effective in inducing cell death and calcium signaling.

Conclusions:

• MMs influence cellular environments via unidirectional rotation.
• Internal mechanical forces from MMs can controllably induce cell activity.
• MM design, specifically functional groups, is critical for biological applications.