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Binding properties of Echinococcus granulosus fatty acid binding protein
G Alvite1, S M Di Pietro, J A Santomé
1Sección Bioquímica, Facultad de Ciencias, Montevideo, Uruguay.
Biochimica Et Biophysica Acta
|December 4, 2001
Summary
EgFABP1, a fatty acid binding protein from Echinococcus granulosus, binds two fatty acids with high affinity. This unique characteristic may play a role in parasite metabolism.
Area of Science:
- Biochemistry
- Parasitology
- Molecular Biology
Background:
- EgFABP1 is an intracellular fatty acid binding protein found in the parasitic platyhelminth Echinococcus granulosus.
- It belongs to the heart-type fatty acid binding protein (H-FABP) family.
Purpose of the Study:
- To characterize the binding properties and ligand affinity of recombinant EgFABP1.
- To investigate the structure-function relationships and potential metabolic roles of EgFABP1 in E. granulosus.
Main Methods:
- Recombinant EgFABP1 was expressed and purified.
- Ligand binding was analyzed using fluorescence spectroscopy with cis- and trans-parinaric acid.
- Binding preferences were determined through displacement assays using various fatty acids.
Main Results:
- EgFABP1 exhibits two high-affinity binding sites for cis- and trans-parinaric acid (Kd1 ~24-32 nM, Kd2 ~364-510 nM).
- Arachidonic and oleic acids showed the highest displacement percentages, indicating strong binding.
- EgFABP1 is unique among H-FABPs for its ability to bind two long-chain fatty acids with high affinity.
Conclusions:
- EgFABP1 possesses distinct fatty acid binding capabilities.
- These properties suggest a significant role for EgFABP1 in the lipid metabolism of Echinococcus granulosus.
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