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Updated: Oct 12, 2025

In Vitro Assay of Bacterial Adhesion onto Mammalian Epithelial Cells
Published on: May 16, 2011
The Flo Adhesin Family
Ronnie G Willaert1,2,3, Yeseren Kayacan1,2,3,4, Bart Devreese2,3,4,5
1Research Group Structural Biology Brussels (SBB), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium.
Abstract:
The first step in the infection of fungal pathogens in humans is the adhesion of the pathogen to host tissue cells or abiotic surfaces such as catheters and implants. One of the main players involved in this are the expressed cell wall adhesins. Here, we review the Flo adhesin family and their involvement in the adhesion of these yeasts during human infections. Firstly, we redefined the Flo adhesin family based on the domain architectures that are present in the Flo adhesins and their functions, and set up a new classification of Flo adhesins. Next, the structure, function, and adhesion mechanisms of the Flo adhesins whose structure has been solved are discussed in detail. Finally, we identified from Pfam database datamining yeasts that could express Flo adhesins and are encountered in human infections and their adhesin architectures. These yeasts are discussed in relation to their adhesion characteristics and involvement in infections.
Insights
Fungal pathogens adhere to hosts via cell wall adhesins. This review redefines the Flo adhesin family, detailing their structure, function, and role in human infections, aiding in understanding fungal adhesion mechanisms.
Area of Science:
- Medical Mycology
- Molecular Biology
- Biochemistry
Background:
- Fungal pathogen adhesion to host tissues and medical devices is a critical initial step in human infections.
- Cell wall adhesins are key molecular players mediating this crucial adhesion process.
Purpose of the Study:
- To review the Flo adhesin family and their specific roles in fungal adhesion during human infections.
- To establish a new classification for Flo adhesins based on domain architecture and function.
- To identify and discuss yeasts expressing Flo adhesins relevant to human infections.
Main Methods:
- Literature review and analysis of existing research on Flo adhesins.
- Redefinition of the Flo adhesin family based on domain structures and known functions.
- Pfam database mining to identify yeasts expressing Flo adhesins.
- Analysis of solved Flo adhesin structures to understand adhesion mechanisms.
Main Results:
- A redefined classification of the Flo adhesin family based on domain architecture.
- Detailed discussion of the structure, function, and adhesion mechanisms of solved Flo adhesins.
- Identification of specific yeast species encountered in human infections that express Flo adhesins, along with their architectural features.
Conclusions:
- The Flo adhesin family plays a significant role in fungal adhesion to host cells and abiotic surfaces.
- Understanding Flo adhesin structure and function provides insights into fungal pathogenesis.
- Identification of relevant yeasts and their adhesin architectures aids in developing strategies against fungal infections.
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