Adhesive Interactions of Mussel Foot Proteins by Jing Yu

By Jing Yu

Water and moisture undermine powerful adhesion to polar surfaces. Marine mussels, even though, in achieving sturdy underwater adhesion utilizing a set of proteins which are odd in having excessive degrees of three, 4-dihydroxyphenylalanine (Dopa). Mussel adhesion has encouraged a variety of reports on constructing the following iteration of rainy adhesives. This thesis offers fresh development in figuring out the fundamental floor and intermolecular interactions hired by way of mussels to accomplish powerful and sturdy rainy adhesion. the skin forces equipment (SFA) and numerous different strategies 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 a number of mussel adhesive proteins. the implications during this thesis convey that Dopa performs a vital position in mussel adhesion and that mussels delicately regulate the interfacial redox atmosphere to accomplish powerful and sturdy Dopa mediated adhesion. The interaction among Dopa and hydrophobic interactions can be obtrusive in mussel adhesion.

Show description

Read or Download Adhesive Interactions of Mussel Foot Proteins PDF

Similar family & general practice books

Attention Deficit Hyperactivity Disorder Handbook: A Physician's Guide to ADHD

Readers of awareness Deficit Hyperactivity illness guide: A Physician's advisor to ADHD, moment variation will discover a concise and scholarly paintings overlaying the latest advances in factors and administration of ADHD. The e-book offers solutions to the varied questions that encompass ADHD, similar to: How is ADHD clinically determined?

Essential hypertension and its causes. Neural and non-neural mechanisms

This new account of the pathogenesis of crucial high blood pressure (EH) represents an in depth research of the most elements of the circulatory regulate approach. The latter's homes resemble these of synthetic adaptive regulate structures within which regulatory parameters are altered while working stipulations exceed convinced limits, usually via neural mechanisms.

Wireless Cortical Implantable Systems

Instant Cortical Implantable structures examines the layout for facts acquisition and transmission in cortical implants. the 1st a part of the booklet covers latest approach point cortical implants, in addition to destiny units. The authors talk about the most important constraints by way of microelectronic integrations are awarded.

Psychosomatic Medicine: An International Primer for the Primary Care Setting

Psychosocial difficulties look inside of a clinical context world wide, and are an important burden to well-being. Psychosomatic drugs: a world Primer for the first Care environment takes a uniquely international procedure in laying the rules of bio psychosocial easy care (such as spotting psychosocial and psychosomatic difficulties, simple counseling and collaboration with psychological overall healthiness experts) and gives appropriate information regarding the commonest psychological and psychosomatic difficulties and problems.

Additional info for Adhesive Interactions of Mussel Foot Proteins

Sample text

When water molecules interact with nonpolar molecules (such as hydrocarbons) that are incapable of forming hydrogen bonds with water molecules, they lose the ability of maintaining their normal H-bonding network. Water solves this problem by two ways, which give the two limits of the hydrophobic interactions. When the nonpolar solute molecule is small (the diameter is typically smaller than 1 nm), water molecules can rearrange themselves around it without breaking their H-bonding network. Although its rearrangement requires an entropy penalty, it is energetically favorable [9].

A–e) Mfp-3 variants are secreted into the distal depression (a) and partially adsorbed by Dopa-mediated H-bonds to the mica surface. The oxidation of unadsorbed Dopa to dopaquinone (b) is counteracted by reducing thiolates (c) in Mfp-6, which enables enhanced adsorption (d). Depletion of thiolate pairs in Mfp-6 transforms Mfp-6 into a cross-linker with Mfp-3 (e). Red reduced, ox oxidized of the polysiloxane surface of mica [27] probably shields Dopa H-bonded to mica from oxidation (Fig. 6b). As predicted by Bell theory and by analogy to the A-T pairs in DNA, the well-oriented bidentate hydrogen bonding (E = ~ −28kT) of Dopa to mica should have a binding lifetime (τ = τ0e− E/kT) that is 106 times as long as the monodentate form (E = ~ −14kT) [28].

A) Mfp-3 on mica at pH 3. (b) A 30 % loss of adhesion was measured after adding 400 pmol NaIO4 into the gap at pH 3. (c) Near-abolition of adhesion after adding 600 pmol NaIO4 into the gap solution at pH 3. 25 mM) into the gap solution recovered about 30 % of the adhesion Clearly, Dopa in purified Mfp-3 is susceptible to oxidation during testing in the SFA. In contrast, however, biochemical analysis of plaques shows that the Dopa content of adhesive proteins such as Mfp-3 and Mfp-5 remains largely intact while they reside in the plaque footprints [1].

Download PDF sample

Rated 4.91 of 5 – based on 37 votes