Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 2.90 kDa 
• Atom Count: 197 
• Modelled Residue Count: 27 
• Deposited Residue Count: 27 
• Unique protein chains: 1

2HGO

NMR structure of Cassiicolin

• DOI: 10.2210/pdb2HGO/pdb

• Classification: TOXIN
• Organism(s): Corynespora cassiicola
• Expression System: Corynespora cassiicola
• Mutation(s): Yes 


• Deposited: 2006-06-27 Released: 2007-02-27 
• Deposition Author(s): Barthe, P., Pujade-Renault, V., Roumestand, C., de Lamotte, F.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structural Analysis of Cassiicolin, a Host-selective Protein Toxin from Corynespora cassiicola

Barthe, P., Pujade-Renaud, V., Breton, F., Gargani, D., Thai, R., Roumestand, C., de Lamotte, F.

(2007) J Mol Biol 367: 89-101

• PubMed: 17234212 
• DOI: 10.1016/j.jmb.2006.11.086
• Primary Citation of Related Structures:  
  2HGO


• PubMed Abstract: 
  

Cassiicolin is a host-selective toxin (HST) produced by the fungus Corynespora cassiicola (strain CCP). It is responsible for the Corynespora leaf fall (CLF) disease, which is among the main pathologies affecting rubber tree (Hevea brasiliensis). Working on purified cassiicolin and using electron microscopy, we have demonstrated that this 27-residue O-glycosylated protein is able to induce cellular damages identical to those induced by the fungus on rubber tree leaves and displays the same host selectivity. The solution structure and disulfide pairing of cassiicolin have been determined using NMR spectroscopy and simulated annealing calculations. Cassiicolin appears to have an original structure with a prolate ellipsoid shape. It adopts an over-all fold consisting of three strands arranged in a right-handed twisted, antiparallel beta-sheet knitted by three disulfide bonds. Its conformation resembles that found in small trypsine-like inhibitors isolated from the brain, the fat body and the hemolymph of locust grasshoppers. But cassiicolin has no sequence homology with these protease inhibitors, and lacks their characteristic substrate-binding loop. Probably, this motif represents one of the few highly stabilized "minimal" scaffolds, with a high sequence permissiveness, that nature has selected to evolve over different phyla and to support different functions. The knowledge of the 3D structure opens the way to the delineation of the mechanism of action of the toxin using site-directed mutagenesis.

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Organizational Affiliation: 

Centre de Biochimie Structurale, UMR 5048 CNRS/UM1-UMR 554 Inserm/UM1, 29 rue de Navacelles, 34090 Montpellier Cedex, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CASSIICOLIN	A	27	Corynespora cassiicola	Mutation(s): 1
UniProt
Find proteins for P84902 (Corynespora cassiicola) Explore P84902  Go to UniProtKB:  P84902

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
3HD	B [auth A]	1,5-anhydro-3-O-methyl-D-mannitol C7 H14 O5 GWYGLRYBQUSWAT-DBRKOABJSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	A	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2HGO Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-06-27 
• Released Date: 2007-02-27 
Deposition Author(s): Barthe, P., Pujade-Renault, V., Roumestand, C., de Lamotte, F.

Revision History  

• Version 1.0: 2007-02-27
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2019-12-25
  Changes: Data collection, Database references, Derived calculations, Polymer sequence
• Version 2.1: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Derived calculations, Structure summary