Single-Molecule Force Spectroscopy Study on Modular Resilin Fusion Protein

Alessandra Griffo, Hendrik Hähl, Samuel Grandthyll, Frank Müller, Arja Paananen, Marja Ilmén, Géza Szilvay, Christopher P. Landowski, Merja Penttilä, Karin Jacobs, Päivi Laaksonen

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The adhesive and mechanical properties of a modular fusion protein consisting of two different types of binding units linked together via a flexible resilin-likepolypeptide domain are quantified. The adhesive domains have been constructed from fungal cellulose-binding modules (CBMs) and an amphiphilic hydrophobin HFBI. This study is carried out by single-molecule force spectroscopy, which enables stretching of single molecules. The fusion proteins are designed to self-assemble on the cellulose surface, leading into the submonolayer of proteins having the HFBI pointing away from the surface. A hydrophobic atomic force microscopy (AFM) tip can be employed for contacting and lifting the single fusion protein from the HFBI-functionalized terminus by the hydrophobic interaction between the tip surface and the hydrophobic patch of the HFBI. The work of rupture, contour length at rupture and the adhesion forces of the amphiphilic end domains are evaluated under aqueous environment at different pHs.

Original languageEnglish
Pages (from-to)6906-6915
Number of pages10
JournalACS Omega
Volume2
Issue number10
DOIs
Publication statusPublished - 1 Jan 2017
MoE publication typeA1 Journal article-refereed

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