Adhesive Interactions of Mussel Foot Proteins by Jing Yu

By Jing Yu

Water and moisture undermine robust adhesion to polar surfaces. Marine mussels, despite the fact that, in achieving sturdy underwater adhesion utilizing a set of proteins which are abnormal in having excessive degrees of three, 4-dihydroxyphenylalanine (Dopa). Mussel adhesion has encouraged quite a few experiences on constructing the subsequent new release of rainy adhesives. This thesis provides contemporary growth in knowing the elemental floor and intermolecular interactions hired by means of mussels to accomplish powerful and sturdy rainy adhesion. the outside forces equipment (SFA) and numerous different options have been utilized to degree the interactions among mussel foot protein-3 fast (Mfp-3 fast) and the version substrate, mica, in addition to the interactions among numerous mussel adhesive proteins. the consequences during this thesis exhibit that Dopa performs a vital function in mussel adhesion and that mussels delicately keep an eye on the interfacial redox setting to accomplish robust and sturdy Dopa mediated adhesion. The interaction among Dopa and hydrophobic interactions can also be obtrusive in mussel adhesion.

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By Jing Yu

Water and moisture undermine robust adhesion to polar surfaces. Marine mussels, despite the fact that, in achieving sturdy underwater adhesion utilizing a set of proteins which are abnormal in having excessive degrees of three, 4-dihydroxyphenylalanine (Dopa). Mussel adhesion has encouraged quite a few experiences on constructing the subsequent new release of rainy adhesives. This thesis provides contemporary growth in knowing the elemental floor and intermolecular interactions hired by means of mussels to accomplish powerful and sturdy rainy adhesion. the outside forces equipment (SFA) and numerous different options have been utilized to degree the interactions among mussel foot protein-3 fast (Mfp-3 fast) and the version substrate, mica, in addition to the interactions among numerous mussel adhesive proteins. the consequences during this thesis exhibit that Dopa performs a vital function in mussel adhesion and that mussels delicately keep an eye on the interfacial redox setting to accomplish robust and sturdy Dopa mediated adhesion. The interaction among Dopa and hydrophobic interactions can also be obtrusive in mussel adhesion.

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10) where μ is the refractive index of the medium, µ = µ mica / µ is the effective ­refractive index, and ± refers to odd and even order fringes, respectively. References 1. Israelachvili JN (2011) Intermolecular and surface forces, 3rd edn. Academic, Burlington, MA 2. Derjaguin B, Landau L (1945) Zhurnal Eksperimentalnoi I Teoreticheskoi Fiziki 15(11): 663–682 4. Verwey EJW, Overbeek JTG, Nes KV (1948) Theory of the stability of lyophobic colloids; the interaction of sol particles having an electric double layer.

6 Adhesion of Mfp-3 at different pH values before and after adding Mfp-6. 5 did not recover significant adhesion. 7 mJ/m2 was measured after keeping the two surfaces in contact for 1 min. 15 mJ/m2 when the surfaces were in contact for 60 min. (c) Even stronger recovery of adhesion was evident after injecting Mfp-6 at pH 3. 85 mJ/m2 for 60 min contact. (d) Injecting S-carboxymethylated Mfp-6 at pH 3 failed to recover the lost adhesion of Mfp-3 38 4 Antioxidant is a Key Factor in Mussel Protein Adhesion Dopaquinone formed in Mfp-3 (Fig.

8 Reaction mechanism of quinone reduction by thiolates. Reaction begins with a nucleophilic attack on the quinone by the first thiolate forming a nonaromatic intermediate adduct. The second thiolate then attacks the thioether adduct thereby eliminating the disulfide and regenerating Dopa because of the unusual requirements of this adaptation, the cDNA-deduced sequence of Mfp-6 has no homology with any proteins in the database (BLAST). Although Mfp-6 is 11 mol% cysteine, only 1–3 cysteines are thiols, two form a disulfide, and the remaining seven occur in an unknown nonreducible form.

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