Synergistic roles for lipids and proteins in the permanent adhesive of barnacle larvae

Neeraj V. Gohad (), Nick Aldred, Christopher M. Hartshorn, Young Jong Lee, Marcus T. Cicerone, Beatriz Orihuela, Anthony S. Clare, Dan Rittschof and Andrew S. Mount
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Neeraj V. Gohad: Biological Sciences, Clemson University
Nick Aldred: School of Marine Science and Technology, Newcastle University
Christopher M. Hartshorn: Materials Measurement Laboratory, National Institutes of Standards and Technology
Young Jong Lee: Materials Measurement Laboratory, National Institutes of Standards and Technology
Marcus T. Cicerone: Materials Measurement Laboratory, National Institutes of Standards and Technology
Beatriz Orihuela: Duke University Marine Laboratory, Nicholas School of the Environment
Anthony S. Clare: School of Marine Science and Technology, Newcastle University
Dan Rittschof: Duke University Marine Laboratory, Nicholas School of the Environment
Andrew S. Mount: Biological Sciences, Clemson University

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Thoracian barnacles rely heavily upon their ability to adhere to surfaces and are environmentally and economically important as biofouling pests. Their adhesives have unique attributes that define them as targets for bio-inspired adhesive development. With the aid of multi-photon and broadband coherent anti-Stokes Raman scattering microscopies, we report that the larval adhesive of barnacle cyprids is a bi-phasic system containing lipids and phosphoproteins, working synergistically to maximize adhesion to diverse surfaces under hostile conditions. Lipids, secreted first, possibly displace water from the surface interface creating a conducive environment for introduction of phosphoproteins while simultaneously modulating the spreading of the protein phase and protecting the nascent adhesive plaque from bacterial biodegradation. The two distinct phases are contained within two different granules in the cyprid cement glands, implying far greater complexity than previously recognized. Knowledge of the lipidic contribution will hopefully inspire development of novel synthetic bioadhesives and environmentally benign antifouling coatings.

Date: 2014
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DOI: 10.1038/ncomms5414

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