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Relationship between Active Oxygen Species, Lipid Peroxidation, Necrosis, and Phytoalexin Production Induced by Elicitins in Nicotiana
TLDR
The results suggest that AOS production, lipid peroxidation, and necrosis are directly related, whereas phytoalexin production depends on neither the presence nor the intensity of these responses. Expand
Responses of Cultured Tobacco Cells to Cryptogein, a Proteinaceous Elicitor from Phytophthora cryptogea: Possible Plasmalemma Involvement.
TLDR
Results of binding studies with whole cells suggested the presence of elicitor-binding sites with a high affinity for cryptogein, which reduced the fusicoccin-induced acidification of the extracellular medium and inhibited the activity of a purified plasma membrane ATPase. Expand
Modulation of the biological activity of a tobacco LTP1 by lipid complexation.
TLDR
It is shown that a recombinant tobacco LTP1 is able to load fatty acids and jasmonic acid and points out the crucial role of protein-specific lipophilic ligand interaction in the modulation of the protein activity. Expand
Active oxygen species production in tobacco cells elicited by cryptogein
TLDR
Changes in extracellular pH were shown to modulate the intensity of AOS production by elicited cells, and the involvement of a NADPH oxidase-like enzyme leading to H 2 O 2 production through O 2 - dismutation was suggested. Expand
Elicitation of tobacco cells with ergosterol activates a signal pathway including mobilization of internal calcium
TLDR
The use of several inhibitors of calcium channels and a protein-kinase inhibitor suggests that the elicitation with ergosterol includes the mobilization of internal calcium stores mediated by inositol 1,4,5-trisphosphate and serine/threonine protein kinases. Expand
Tropane derivatives from Calystegia sepium
TLDR
A family of novel polyhydroxy- nor -tropanes that occur in two species of the Convolvulaceae and in Atropa belladonna are described and their potential ecological significance is discussed. Expand
The fungal elicitor cryptogein is a sterol carrier protein
TLDR
The results show that cryptogein has one binding site with strong affinity for dehydroergosterol, and this protein catalyzes the transfer of sterols between phospholipidic artificial membranes, the first evidence for the existence of an extracellular sterol carrier protein and for a molecular activity of Cryptogein. Expand
The 1.45 A resolution structure of the cryptogein-cholesterol complex: a close-up view of a sterol carrier protein (SCP) active site.
TLDR
The large inner non-specific hydrophobic cavity is able to accommodate a large variety of 3-beta-hydroxy sterols and probably acts as a sterol shuttle helping the pathogen to grow and complete its life cycle. Expand
Beticolins, nonpeptidic, polycyclic molecules produced by the phytopathogenic fungus Cercospora beticola, as a new family of ion channel-forming toxins.
TLDR
Investigation of pore formation by three ortho-beticolins, B0, B2, and B4, and their related para-isomers using planar lipid bilayers finds all beticolins were able to form ion channels with multiple conductance states, although the type of cyclization and residue result in variations of channel conductance and ionic permeability, respectively. Expand
Magnesium ions promote assembly of channel-like structures from beticolin 0, a non-peptide fungal toxin purified from Cercospora beticola.
TLDR
A strong and Mg(2+)-dependent increase in the membrane conductance of Arabidopsis protoplasts and Xenopus oocytes is produced using beticolin 0 (B0), which is likely to originate from the ability of this toxin to organize itself into transmembrane pores in the presence of Mg2+. Expand
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