Expression of a fungal hydrophobin in the Saccharomyces cerevisiae cell wall: effect on cell surface properties and immobilization

Tiina Nakari-Setälä (Corresponding Author), Joana Azeredo, Mariana Henriques, Rosario Oliveira, Jose Teixeira, Markus Linder, Merja Penttilä

Research output: Contribution to journalArticleScientificpeer-review

25 Citations (Scopus)

Abstract

The aim of this work was to modify the cell surface properties of Saccharomyces cerevisiae by expression of the HFBI hydrophobin of the filamentous fungus Trichoderma reesei on the yeast cell surface. The second aim was to study the immobilization capacity of the modified cells. Fusion to the Flo1p flocculin was used to target the HFBI moiety to the cell wall. Determination of cell surface characteristics with contact angle and zeta potential measurements indicated that HFBI-producing cells are more apolar and slightly less negatively charged than the parent cells. Adsorption of the yeast cells to different commercial supports was studied. A twofold increase in the binding affinity of the hydrophobin-producing yeast to hydrophobic silicone-based materials was observed, while no improvement in the interaction with hydrophilic carriers could be seen compared to that of the parent cells. Hydrophobic interactions between the yeast cells and the support are suggested to play a major role in attachment. Also, a slight increase in the initial adsorption rate of the hydrophobin yeast was observed. Furthermore, due to the engineered cell surface, hydrophobin-producing yeast cells were efficiently separated in an aqueous two-phase system by using a nonionic polyoxyethylene detergent, C12-18EO5.
Original languageEnglish
Pages (from-to)3385-3391
JournalApplied and Environmental Microbiology
Volume68
Issue number7
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

Surface Properties
Immobilization
immobilization
Cell Wall
yeast
Saccharomyces cerevisiae
cell walls
Yeasts
yeasts
cells
adsorption
Hydrophobic and Hydrophilic Interactions
detergent
Adsorption
hydrophobins
effect
fungus
Trichoderma reesei
Trichoderma
contact angle

Keywords

  • hydrophobins
  • Saccharomyces cerevisiae
  • cell surface
  • immobilization
  • HFBI

Cite this

Nakari-Setälä, Tiina ; Azeredo, Joana ; Henriques, Mariana ; Oliveira, Rosario ; Teixeira, Jose ; Linder, Markus ; Penttilä, Merja. / Expression of a fungal hydrophobin in the Saccharomyces cerevisiae cell wall: effect on cell surface properties and immobilization. In: Applied and Environmental Microbiology. 2002 ; Vol. 68, No. 7. pp. 3385-3391.
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Expression of a fungal hydrophobin in the Saccharomyces cerevisiae cell wall: effect on cell surface properties and immobilization. / Nakari-Setälä, Tiina (Corresponding Author); Azeredo, Joana; Henriques, Mariana; Oliveira, Rosario; Teixeira, Jose; Linder, Markus; Penttilä, Merja.

In: Applied and Environmental Microbiology, Vol. 68, No. 7, 2002, p. 3385-3391.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Nakari-Setälä, Tiina

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AU - Teixeira, Jose

AU - Linder, Markus

AU - Penttilä, Merja

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AB - The aim of this work was to modify the cell surface properties of Saccharomyces cerevisiae by expression of the HFBI hydrophobin of the filamentous fungus Trichoderma reesei on the yeast cell surface. The second aim was to study the immobilization capacity of the modified cells. Fusion to the Flo1p flocculin was used to target the HFBI moiety to the cell wall. Determination of cell surface characteristics with contact angle and zeta potential measurements indicated that HFBI-producing cells are more apolar and slightly less negatively charged than the parent cells. Adsorption of the yeast cells to different commercial supports was studied. A twofold increase in the binding affinity of the hydrophobin-producing yeast to hydrophobic silicone-based materials was observed, while no improvement in the interaction with hydrophilic carriers could be seen compared to that of the parent cells. Hydrophobic interactions between the yeast cells and the support are suggested to play a major role in attachment. Also, a slight increase in the initial adsorption rate of the hydrophobin yeast was observed. Furthermore, due to the engineered cell surface, hydrophobin-producing yeast cells were efficiently separated in an aqueous two-phase system by using a nonionic polyoxyethylene detergent, C12-18EO5.

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