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 1.3 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


  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHARYBDOTOXIN
A
37Leiurus quinquestriatus hebraeusMutation(s): 0 
Find proteins for P13487 (Leiurus quinquestriatus hebraeus)
Go to UniProtKB:  P13487
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 
  • Olderado: 2CRD Olderado
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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