3VH7

Structure of HIV-1 gp41 NHR/fusion inhibitor complex P21


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.019 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis of potent and broad HIV-1 fusion inhibitor CP32M

Yao, X.Chong, H.Zhang, C.Qiu, Z.Qin, B.Han, R.Waltersperger, S.Wang, M.T.He, Y.Cui, S.

(2012) J.Biol.Chem. 287: 26618-26629

  • DOI: 10.1074/jbc.M112.381079
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CP32M is a newly designed peptide fusion inhibitor possessing potent anti-HIV activity, especially against T20-resistant HIV-1 strains. In this study, we show that CP32M can efficiently inhibit a large panel of diverse HIV-1 variants, including subty ...

    CP32M is a newly designed peptide fusion inhibitor possessing potent anti-HIV activity, especially against T20-resistant HIV-1 strains. In this study, we show that CP32M can efficiently inhibit a large panel of diverse HIV-1 variants, including subtype B', CRF07_BC, and CRF01_AE recombinants and naturally occurring or induced T20-resistant viruses. To elucidate its mechanism of action, we determined the crystal structure of CP32M complexed with its target sequence. Differing from its parental peptide, CP621-652, the (621)VEWNEMT(627) motif of CP32M folds into two α-helix turns at the N terminus of the pocket-binding domain, forming a novel layer in the six-helix bundle structure. Prominently, the residue Asn-624 of the (621)VEWNEMT(627) motif is engaged in the polar interaction with a hydrophilic ridge that borders the hydrophobic pocket on the N-terminal coiled coil. The original inhibitor design of CP32M provides several intra- and salt bridge/hydrogen bond interactions favoring the stability of the helical conformation of CP32M and its interactions with N-terminal heptad repeat (NHR) targets. We identified a novel salt bridge between Arg-557 on the NHR and Glu-648 of CP32M that is critical for the binding of CP32M and resistance against the inhibitor. Therefore, our data present important information for developing novel HIV-1 fusion inhibitors for clinical use.


    Organizational Affiliation

    MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, 9 Dong Dan San Tiao, Beijing 100730, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Envelope glycoprotein gp160
A, C, E
58Human immunodeficiency virus type 1 group M subtype B (isolate BH10)Mutation(s): 0 
Gene Names: env
Find proteins for P03375 (Human immunodeficiency virus type 1 group M subtype B (isolate BH10))
Go to UniProtKB:  P03375
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CP32M
B, D, F
34N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
E
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.019 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.222 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 50.506α = 90.00
b = 45.504β = 107.65
c = 55.514γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
RemDAqdata collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-13
    Type: Initial release
  • Version 1.1: 2013-06-26
    Type: Database references