Practical recombinant hybrid mussel bioadhesive fp-151

Area of Science:

• Biomaterials Science
• Protein Engineering
• Adhesive Technology

Background:

• Mussel adhesive proteins (MAPs) are promising eco-friendly adhesives for medical and aqueous applications.
• Previous attempts to produce functional recombinant MAPs, like foot protein type 1 (fp-1), have been unsuccessful.
• Recombinant foot protein type 5 (fp-5) showed adhesive ability but suffered from low yield, purification issues, and insolubility.

Purpose of the Study:

• To engineer a novel hybrid mussel bioadhesive, fp-151, by fusing foot protein type 1 (fp-1) and foot protein type 5 (fp-5).
• To overcome the limitations of previous recombinant MAP production, including low yield, purification difficulties, and insolubility.
• To evaluate the adhesive strength, solubility, and biocompatibility of the engineered fp-151 for practical bioadhesive applications.

Main Methods:

• Designed and constructed a fusion protein, fp-151, by incorporating six fp-1 decapeptide repeats at each terminus of fp-5.
• Utilized micro- and bulk-scale characterization techniques to assess adhesive properties.
• Performed mammalian cell-adhesion analyses to evaluate biocompatibility and functional performance.

Main Results:

• Demonstrated that fp-151 possesses strong adhesive ability.
• Achieved a simple purification process with approximately 1g of purified protein per 1L of culture.
• Reported high solubility (approximately 330g/L) and excellent biocompatibility.
• Obtained a practical production yield (approximately 1g/L) from pilot-scale fed-batch bioreactor cultures.

Conclusions:

• The novel hybrid mussel bioadhesive fp-151 effectively overcomes previous production and performance limitations.
• fp-151 exhibits strong adhesive capabilities, good solubility, and high biocompatibility, indicating its potential for practical applications.
• This engineered protein represents a significant advancement in the development of mussel-inspired bioadhesives for various fields.