4R61

Crystal structure of a rationally designed single-chain protein mimicking a trimeric gp41 N-terminal heptad-repeat region


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Single-chain protein mimetics of the N-terminal heptad-repeat region of gp41 with potential as anti-HIV-1 drugs.

Crespillo, S.Camara-Artigas, A.Casares, S.Morel, B.Cobos, E.S.Mateo, P.L.Mouz, N.Martin, C.E.Roger, M.G.El Habib, R.Su, B.Moog, C.Conejero-Lara, F.

(2014) Proc.Natl.Acad.Sci.USA 111: 18207-18212

  • DOI: 10.1073/pnas.1413592112
  • Also Cited By: 6R2G

  • PubMed Abstract: 
  • During HIV-1 fusion to the host cell membrane, the N-terminal heptad repeat (NHR) and the C-terminal heptad repeat (CHR) of the envelope subunit gp41 become transiently exposed and accessible to fusion inhibitors or Abs. In this process, the NHR regi ...

    During HIV-1 fusion to the host cell membrane, the N-terminal heptad repeat (NHR) and the C-terminal heptad repeat (CHR) of the envelope subunit gp41 become transiently exposed and accessible to fusion inhibitors or Abs. In this process, the NHR region adopts a trimeric coiled-coil conformation that can be a target for therapeutic intervention. Here, we present an approach to rationally design single-chain protein constructs that mimic the NHR coiled-coil surface. The proteins were built by connecting with short loops two parallel NHR helices and an antiparallel one with the inverse sequence followed by engineering of stabilizing interactions. The constructs were expressed in Escherichia coli, purified with high yield, and folded as highly stable helical coiled coils. The crystal structure of one of the constructs confirmed the predicted fold and its ability to accurately mimic an exposed gp41 NHR surface. These single-chain proteins bound to synthetic CHR peptides with very high affinity, and furthermore, they showed broad inhibitory activity of HIV-1 fusion on various pseudoviruses and primary isolates.


    Organizational Affiliation

    Departamento de Química Física e Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain; conejero@ugr.es.,Departamento de Química Física e Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain;,PX'Therapeutics, 38040 Grenoble Cedex 9, France;,Department of Chemistry and Physics, Agrifood Campus of International Excellence (ceiA3), University of Almería, 04120 Almería, Spain;,Sanofi Pasteur S.A., Campus Mérieux, 69280 Marcy l'Etoile, France; and.,INSERM U1109, Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, 67000 Strasbourg, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
gp41-based construct covNHR3-ABC
A
175N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.247 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 57.956α = 90.00
b = 57.956β = 90.00
c = 257.671γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
BsxCuBEdata collection
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-12-10
    Type: Initial release
  • Version 1.1: 2014-12-24
    Type: Database references
  • Version 1.2: 2015-01-14
    Type: Database references