1ED0

NMR structural determination of viscotoxin A3 from Viscum album L.


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 600 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR structural determination of viscotoxin A3 from Viscum album L.

Romagnoli, S.Ugolini, R.Fogolari, F.Schaller, G.Urech, K.Giannattasio, M.Ragona, L.Molinari, H.

(2000) Biochem.J. 350: 569-577


  • PubMed Abstract: 
  • The high-resolution three-dimensional structure of the plant toxin viscotoxin A3, from Viscum album L., has been determined in solution by (1)H NMR spectroscopy at pH 3.6 and 12 degrees C (the structure has been deposited in the Protein Data Bank und ...

    The high-resolution three-dimensional structure of the plant toxin viscotoxin A3, from Viscum album L., has been determined in solution by (1)H NMR spectroscopy at pH 3.6 and 12 degrees C (the structure has been deposited in the Protein Data Bank under the id. code 1ED0). Experimentally derived restraints including 734 interproton distances from nuclear Overhauser effect measurements, 22 hydrogen bonds, 32 φ angle restraints from J coupling measurements, together with three disulphide bridge constraints were used as input in restrained molecular dynamics, followed by minimization, using DYANA and Discover. Backbone and heavy atom root-mean-square deviations were 0.47+/-0.11 A (1 A=10(-10) m) and 0.85+/-0.13 A respectively. Viscotoxin A3 consists of two alpha-helices connected by a turn and a short stretch of antiparallel beta-sheet. This fold is similar to that found in other thionins, such as crambin, hordothionin-alpha and -beta, phoratoxin A and purothionin-alpha and -beta. The difference in the observed biological activity for thionins of known structure is discussed in terms of the differences in the calculated surface potential distribution, playing an important role in their function through disruption of cell membranes. In addition, the possible role in DNA binding of the helix-turn-helix motif of viscotoxin A3 is discussed.


    Organizational Affiliation

    Dipartimento Scientifico e Tecnologico, Cà Vignal 1, Strada le Grazie, 37134 Verona, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VISCOTOXIN A3
A
46Viscum albumGene Names: THI2.1
Find proteins for P01538 (Viscum album)
Go to UniProtKB:  P01538
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 600 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 
  • Olderado: 1ED0 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-02-04
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance