2CRD

ANALYSIS OF SIDE-CHAIN ORGANIZATION ON A REFINED MODEL OF CHARYBDOTOXIN: STRUCTURAL AND FUNCTIONAL IMPLICATIONS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Analysis of side-chain organization on a refined model of charybdotoxin: structural and functional implications.

Bontems, F.Gilquin, B.Roumestand, C.Menez, A.Toma, F.

(1992) Biochemistry 31: 7756-7764

  • DOI: 10.1021/bi00149a003
  • Primary Citation of Related Structures:  
    2CRD

  • PubMed Abstract: 
  • The spatial organization of side chains on a refined model of charybdotoxin is presented. First, the structural role of two groups of well-defined, low-accessible side chains (Thr3, Val5, Val16, Leu20, Cys33 and Leu20, His21, Thr23, Cys17, Cys35) is discussed ...

    The spatial organization of side chains on a refined model of charybdotoxin is presented. First, the structural role of two groups of well-defined, low-accessible side chains (Thr3, Val5, Val16, Leu20, Cys33 and Leu20, His21, Thr23, Cys17, Cys35) is discussed. These side chains are conserved in three out of the five known scorpion toxins acting on K+ channels. Interestingly, they are not conserved in scyllatoxin which presents a slightly different secondary structure organization. Second, the spatial organization of all positively charged residues is analyzed. Comparison with the results presented by Park and Miller [(1992) Biochemistry (preceding paper in this issue)] shows that all functionally important positive residues are located on the beta-sheet side of the toxin. These results are different from those obtained by Auguste et al. [(1992) Biochemistry 31, 648-654] on scyllatoxin, which blocks a different type of K+ channel. This study shows, in fact, that functionally important positive residues are located on the helix side of the toxin. Thus, charybdotoxin and scyllatoxin, which present the same global fold, interact with two different classes of K+ channels by two different parts of the motif.


    Related Citations: 
    • Refined Structure of Charybdotoxin: Common Motifs in Scorpion Toxins and Insect Defensins
      Bontems, F., Roumestand, C., Gilquin, B., Menez, A., Toma, F.
      (1991) Science 254: 1521

    Organizational Affiliation

    Département d'Ingénierie et d'Etude des Protéines, CE-Saclay, Gif-sur-Yvette, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHARYBDOTOXINA37Leiurus quinquestriatus hebraeusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P13487 (Leiurus hebraeus)
Explore P13487 
Go to UniProtKB:  P13487
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
AL-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 
  • OLDERADO: 2CRD Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-07-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other
  • Version 2.0: 2019-12-25
    Changes: Derived calculations, Polymer sequence