Logical gates in actin monomer.

Area of Science:

• Biophysics
• Molecular Computing
• Computational Biology

Background:

• Actin molecules play crucial roles in cellular processes.
• Understanding molecular information processing is key to developing novel computing paradigms.
• Excitable media can exhibit complex computational behaviors.

Purpose of the Study:

• To evaluate the information processing capacity of a single actin molecule.
• To determine the types of logical gates implemented by actin molecules.
• To explore the potential of actin-based systems for molecular computation.

Main Methods:

• Representing filamentous actin as an excitable automaton network (F-actin automaton).
• Modeling atom state updates based on chemical bonds (hard neighbors) and physical proximity (soft neighbors).
• Analyzing propagating patterns of excitation to identify implemented logical gates.

Main Results:

• F-actin automata were shown to implement OR, AND, XOR, and AND-NOT logical gates.
• The AND gate was found to be the most common, while XOR was the rarest.
• One-bit half-adder and controlled-not circuits were successfully implemented using discovered gate architectures.

Conclusions:

• Single actin molecules possess inherent information processing capabilities.
• Actin-based molecular automata can perform fundamental computational tasks.
• The study discusses the speed and space efficiency of F-actin molecular computers.