1OQS

Crystal Structure of RV4/RV7 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.223 

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This is version 1.2 of the entry. See complete history


Literature

Structure of the heterodimeric neurotoxic complex viperotoxin F (RV-4/RV-7) from the venom of Vipera russelli formosensis at 1.9 A resolution.

Perbandt, M.Tsai, I.H.Fuchs, A.Banumathi, S.Rajashankar, K.R.Georgieva, D.Kalkura, N.Singh, T.P.Genov, N.Betzel, C.

(2003) Acta Crystallogr D Biol Crystallogr 59: 1679-1687

  • DOI: 10.1107/s0907444903014987
  • Primary Citation of Related Structures:  
    1OQS

  • PubMed Abstract: 
  • The presynaptic viperotoxin F is the major lethal component of the venom of Vipera russelli formosensis (Taiwan viper). It is a heterodimer of two highly homologous (65% identity) but oppositely charged subunits: a basic and neurotoxic PLA(2) (RV-4) and an acidic non-toxic component with a very low enzymatic activity (RV-7) ...

    The presynaptic viperotoxin F is the major lethal component of the venom of Vipera russelli formosensis (Taiwan viper). It is a heterodimer of two highly homologous (65% identity) but oppositely charged subunits: a basic and neurotoxic PLA(2) (RV-4) and an acidic non-toxic component with a very low enzymatic activity (RV-7). The crystal structure of the complex has been determined by molecular replacement and refined to 1.9 A resolution and an R factor of 22.3% with four RV-4/RV-7 complexes in the asymmetric unit, which do not exhibit any local point-group symmetry. The complex formation decreases the accessible surface area of the two subunits by approximately 1425 A(2). Both PLA(2)s are predicted to have very low, if any, anticoagulant activity. The structure of viperotoxin F is compared with that of the heterodimeric neurotoxin vipoxin from the venom of another viper, V. ammodytes meridionalis. The structural basis for the differences between the pharmacological activities of the two toxins is discussed. The neutralization of the negative charge of the major ligand for Ca(2+), Asp49, by intersubunit salt bridges is probably a common mechanism of self-stabilization of heterodimeric Viperinae snake-venom neurotoxins in the absence of bound calcium.


    Organizational Affiliation

    Institute of Biochemistry and Molecular Biology I, University Hospital Hamburg-Eppendorf, c/o DESY, Building 22a, Notkestrasse 85, 22603 Hamburg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phospholipase A2 RV-7A, C, E, G122Daboia siamensisMutation(s): 0 
EC: 3.1.1.4
Membrane Entity: Yes 
UniProt
Find proteins for P31100 (Daboia siamensis)
Explore P31100 
Go to UniProtKB:  P31100
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Phospholipase A2 RV-4B, D, F, H122Daboia siamensisMutation(s): 0 
EC: 3.1.1.4
Membrane Entity: Yes 
UniProt
Find proteins for Q02471 (Daboia siamensis)
Explore Q02471 
Go to UniProtKB:  Q02471
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.223 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.918α = 90
b = 85.125β = 95.1
c = 78.159γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance