Experimental Data Snapshot

  • Resolution: 1.72 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.267 

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This is version 1.5 of the entry. See complete history


Domain-swapped structure of a mutant of cyanovirin-N.

Botos, I.Mori, T.Cartner, L.K.Boyd, M.R.Wlodawer, A.

(2002) Biochem Biophys Res Commun 294: 184-190

  • DOI: https://doi.org/10.1016/S0006-291X(02)00455-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Cyanovirin-N (CV-N) is a potent 11 kDa HIV-inactivating protein that binds with high affinity to the HIV surface envelope protein gp120. A double mutant P51S/S52P of CV-N was engineered by swapping two critical hinge-region residues Pro51 and Ser52. This mutant has biochemical and biophysical characteristics equivalent to the wild-type CV-N and its structure resembles that of wild-type CV-N. However, the mutant shows a different orientation in the hinge region that connects two domains of the protein. The observation that this double mutant crystallizes under a wide variety of conditions challenges some of the current hypotheses on domain swapping and on the role of hinge-region proline residues in domain orientation. The current structure contributes to the understanding of domain swapping in cyanovirins, permitting rational design of domain-swapped CV-N mutants.

  • Organizational Affiliation

    Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, Frederick, MD 21702-1201, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cyanovirin-N101Nostoc ellipsosporumMutation(s): 2 
Find proteins for P81180 (Nostoc ellipsosporum)
Explore P81180 
Go to UniProtKB:  P81180
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP81180
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.72 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.267 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.093α = 90
b = 48.093β = 90
c = 79.67γ = 120
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-26
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.5: 2023-08-16
    Changes: Data collection, Refinement description