Repulsive Particle Interactions Enable Selective Information Processing at Cellular Interfaces.

Area of Science:

• Cellular biology
• Biophysics
• Systems biology

Background:

• Living systems coordinate functions via information transfer across membrane interfaces.
• Understanding the physical basis of this information relay is crucial for cell biology.

Purpose of the Study:

• To identify a physical mechanism for selective information transmission across membrane interfaces.
• To investigate how spatial features influence information transfer and enable binary classification of external cues.

Main Methods:

• Theoretical modeling of surface-bound particle densities and binding energy.
• Utilizing expansion microscopy to visualize nuclear pore complex distributions in S. arctica.

Main Results:

• A physical mechanism for selective information transmission based on sigmoidal particle density response to spatial features was identified.
• This mechanism implements spatial thresholding, allowing binary classification of external cues.
• Experimental data from nuclear pore complexes show evidence of this physical thresholding mechanism.

Conclusions:

• The identified physical mechanism provides a novel understanding of information processing in living systems.
• Spatial thresholding is a fundamental principle for cellular information relay and decision-making.
• This mechanism is relevant to the function of structures like the nuclear pore complex.