2BIC image
Deposition Date 2005-01-20
Release Date 2006-06-28
Last Version Date 2024-10-09
Entry Detail
PDB ID:
2BIC
Keywords:
Title:
The solution structure of the recombinant elicitor protein PcF from the oomycete pathogen P. cactorum
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
20
Selection Criteria:
LOWEST ENERGY
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:PHYTOTOXIC PROTEIN PCF
Chain IDs:A
Chain Length:52
Number of Molecules:1
Biological Source:PHYTOPHTHORA CACTORUM
Ligand Molecules
Primary Citation
Solution Structure of the Phytotoxic Protein Pcf: The First Characterized Member of the Phytophthora Pcf Toxin Family.
Protein Sci. 18 1786 ? (2009)
PMID: 19554629 DOI: 10.1002/PRO.168

Abstact

The PcF protein from Phytophthora cactorum is the first member of the "PcF toxin family" from the plant pathogens Phytophthora spp. It is able to induce withering in tomato and strawberry leaves. The lack of sequence similarity with other proteins hampers the identification of the molecular mechanisms responsible for its toxicity. Here, we show that the six cysteines form a disulphide pattern that is exclusive for PcF and essential for the protein withering activity. The NMR solution structure identifies a novel fold among protein effectors: a helix-loop-helix motif. The presence of a negatively charged surface suggests that it might act as a site of electrostatic interaction. Interestingly, a good fold match with Ole e 6, a plant protein with allergenic activity, highlighted the spatial superimposition of a stretch of identical residues. This finding suggests a possible biological activity based on molecular mimicry.

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Primary Citation of related structures