2RDK

Five site mutated Cyanovirin-N with Mannose dimer bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conformational gating of dimannose binding to the antiviral protein cyanovirin revealed from the crystal structure at 1.35 A resolution.

Fromme, R.Katiliene, Z.Fromme, P.Ghirlanda, G.

(2008) Protein Sci. 17: 939-944

  • DOI: 10.1110/ps.083472808

  • PubMed Abstract: 
  • Cyanovirin (CV-N) is a small lectin with potent HIV neutralization activity, which could be exploited for a mucosal defense against HIV infection. The wild-type (wt) protein binds with high affinity to mannose-rich oligosaccharides on the surface of ...

    Cyanovirin (CV-N) is a small lectin with potent HIV neutralization activity, which could be exploited for a mucosal defense against HIV infection. The wild-type (wt) protein binds with high affinity to mannose-rich oligosaccharides on the surface of gp120 through two quasi-symmetric sites, located in domains A and B. We recently reported on a mutant of CV-N that contained a single functional mannose-binding site, domain B, showing that multivalent binding to oligomannosides is necessary for antiviral activity. The structure of the complex with dimannose determined at 1.8 A resolution revealed a different conformation of the binding site than previously observed in the NMR structure of wt CV-N. Here, we present the 1.35 A resolution structure of the complex, which traps three different binding conformations of the site and provides experimental support for a locking and gating mechanism in the nanoscale time regime observed by molecular dynamics simulations.


    Related Citations: 
    • A monovalent mutant of cyanovirin-n provides insight into the role of multiple interactions with gp120 for antiviral activity.
      Fromme, R.,Katiliene, Z.,Giomarelli, B.,Bogani, F.,Mc Mahon, J.,Mori, T.,Fromme, P.,Ghirlanda, G.
      (2007) Biochemistry 46: 9199


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cyanovirin-N
A, B
109Nostoc ellipsosporumMutation(s): 5 
Find proteins for P81180 (Nostoc ellipsosporum)
Go to UniProtKB:  P81180
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAN
Query on MAN

Download SDF File 
Download CCD File 
A, B
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.184 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 49.205α = 90.00
b = 38.452β = 99.94
c = 55.953γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-05-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance