Probing Molecular Interactions between Barnacle Peptides and Polymers In Situ to Understand Bioadhesion.

Area of Science:

• Marine Biology
• Materials Science
• Biochemistry

Background:

• Biofouling, the accumulation of organisms on submerged surfaces, significantly impacts maritime operations, increasing costs and environmental concerns.
• Barnacles and their proteins serve as crucial models for investigating biofouling mechanisms due to their adhesive properties.

Purpose of the Study:

• To elucidate the molecular interaction mechanisms between barnacle cement-derived peptides (BCPs) and a polymer interface.
• To provide the first in situ, real-time observation of peptide aggregation at a buried interface.

Main Methods:

• Employed a combined in situ experimental and simulation approach.
• Investigated the role of peptide-charged segments in interfacial interactions.
• Observed the formation of antiparallel β-sheets within the peptide's simple domain.

Main Results:

• The peptide-charged segment was identified as critical for interfacial interactions.
• Antiparallel β-sheet formation was facilitated within the peptide's simple domain upon adsorption.
• Real-time observation of β-sheet formation in adsorbed BCPs at the buried solution-polymer interface was achieved.

Conclusions:

• The findings offer essential insights into BCP aggregation and barnacle fouling mechanisms.
• This research is vital for developing advanced anti-biofouling coatings and strategies in the maritime sector.