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Hydrophobins are small self-assembling proteins produced by fungi. A class I hydrophobin secreted by the basidiomycete fungus Pleurotus ostreatus was purified and identified. The pure protein is not water soluble, whereas complexes formed between the protein and glycans, produced in culture broth containing amylose, are soluble in water. Glycan structure matched to cyclic structures of α-(1-4) linked glucose containing from six to 16 monomers (cyclodextrins). Moreover, it was verified that not only pure cyclodextrins but also a linear oligosaccharide and even the simple glucose monomer are able to solubilize the hydrophobin in water. The aqueous solution of the protein—in the presence of the cyclic glucans—showed propensity to self-assembly, and conformational changes towards beta structure were observed on vortexing the solution. On the other hand, the pure protein dissolved in less polar solvent …
Oxford University Press
Publication date: 
1 May 2010

Annunziata Armenante, Sara Longobardi, Ilaria Rea, Luca De Stefano, Michele Giocondo, Alba Silipo, Antonio Molinaro, Paola Giardina

Biblio References: 
Volume: 20 Issue: 5 Pages: 594-602