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Identification of a fibronectin-binding protein from Staphylococcus epidermidis
Rachel J Williams1, Brian Henderson, Lindsay J Sharp
1Cellular Microbiology Research Group, Eastman Dental Institute for Oral Health Care Sciences, University College London, United Kingdom.
Infection and Immunity
|November 20, 2002
Summary
Researchers identified a novel fibronectin-binding protein, Embp, in Staphylococcus epidermidis. This protein specifically mediates bacterial adhesion to fibronectin, offering potential therapeutic targets for S. epidermidis infections.
Area of Science:
- Microbiology
- Molecular Biology
- Biochemistry
Background:
- Staphylococcus epidermidis frequently colonizes medical devices and host tissues by adhering to extracellular matrix proteins.
- Fibronectin is a key extracellular matrix protein involved in bacterial adhesion and biofilm formation.
Purpose of the Study:
- To identify and characterize a fibronectin-binding protein from Staphylococcus epidermidis.
- To elucidate the role of this protein in bacterial adhesion to fibronectin.
Main Methods:
- Construction and screening of a Staphylococcus epidermidis genomic DNA phage display library against immobilized fibronectin.
- Mapping of positive clones to the S. epidermidis genome sequence database.
- Expression and purification of recombinant proteins (Embp32 and FnBPB[D1-D4]) for binding inhibition assays.
Main Results:
- Identification of a novel fibronectin-binding protein gene, embp, in S. epidermidis.
- The recombinant Embp32 protein specifically blocked S. epidermidis binding to fibronectin, but not Staphylococcus aureus binding.
- The S. aureus FnBPB[D1-D4] protein blocked S. aureus binding but had minimal effect on S. epidermidis binding.
Conclusions:
- Embp is a specific fibronectin-binding protein of Staphylococcus epidermidis.
- Embp plays a crucial role in the adhesion of S. epidermidis to fibronectin.
- Targeting Embp could be a strategy to prevent S. epidermidis colonization and infection.