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RESEARCH PRODUCT
The fungal elicitor cryptogein is a sterol carrier protein
Vladimír MikešJean-pierre BleinPierre RicciMarie-louise MilatMichel Ponchetsubject
Phytophthora0106 biological sciencesBiophysics[SDV.BC]Life Sciences [q-bio]/Cellular Biology01 natural sciencesBiochemistryFluorescenceFungal Proteins03 medical and health scienceschemistry.chemical_compoundStructural BiologyErgosterolPhosphatidylcholinepolycyclic compoundsGeneticsExtracellularBinding siteMolecular Biology[SDV.BC] Life Sciences [q-bio]/Cellular BiologyComputingMilieux_MISCELLANEOUS030304 developmental biology0303 health sciencesbiologyPhytophthora cryptogeaAlgal ProteinsElicitinCell Biologybiology.organism_classificationElicitinSterolElicitorKineticsCholesterolSpectrometry FluorescenceSterol carrier proteinDehydroergosterolBiochemistrychemistryLiposomeslipids (amino acids peptides and proteins)Carrier Proteins010606 plant biology & botanydescription
AbstractCryptogein is a protein secreted by the phytopathogenic pseudo-fungus, Phytophthora cryptogea. It is a basic 10 kDa hydrophilic protein having a hydrophobic pocket and three disulfide bridges. These common features with sterol carrier proteins led us to investigate its possible sterol transfer activity using the fluorescent sterol, dehydroergosterol. The results show that cryptogein has one binding site with strong affinity for dehydroergosterol. Moreover, this protein catalyzes the transfer of sterols between phospholipidic artificial membranes. This is the first evidence for the existence of an extracellular sterol carrier protein and for a molecular activity of cryptogein. This property should contribute to an understanding of the role of cryptogein in plant-microorganism interactions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-01-01 |