Peptide-based artificial cytoskeleton enhances colocalized cascade reactions in cell-like microreactors.

Area of Science:

• Biochemistry
• Cell Biology
• Materials Science

Background:

• Natural cytoskeleton provides structural support and organizes cellular processes.
• Enzyme co-localization is crucial for efficient cascade reactions.

Purpose of the Study:

• To create an artificial cytoskeleton within droplet-based protocells.
• To investigate the effect of this artificial cytoskeleton on cascade reaction efficiency.

Main Methods:

• Self-assembly of phenylalanine-phenylalanine-methionine (FFM) peptide in water-in-oil droplets.
• pH-induced coacervation and fiber formation to create a fibrous network.
• Binding of enzymes (bovine albumin serum, glucose oxidase, horseradish peroxidase) to the artificial cytoskeleton.

Main Results:

• Formation of a fibrous network resembling a cytoskeleton within protocells.
• Successful binding and co-localization of enzymes onto the artificial cytoskeleton.
• Significant enhancement of cascade reaction efficiency, further improved by reducing microreactor size.

Conclusions:

• An artificial cytoskeleton can be formed in protocells via peptide self-assembly.
• This artificial cytoskeleton effectively anchors and co-localizes enzymes, boosting cascade reaction efficiency.
• The findings mimic natural cytoskeleton functions and offer potential for advanced biomimetic systems.