5U1F

Initial contact of HIV-1 Env with CD4: Cryo-EM structure of BG505 DS-SOSIP trimer in complex with CD4 and antibody PGT145


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Quaternary contact in the initial interaction of CD4 with the HIV-1 envelope trimer.

Liu, Q.Acharya, P.Dolan, M.A.Zhang, P.Guzzo, C.Lu, J.Kwon, A.Gururani, D.Miao, H.Bylund, T.Chuang, G.Y.Druz, A.Zhou, T.Rice, W.J.Wigge, C.Carragher, B.Potter, C.S.Kwong, P.D.Lusso, P.

(2017) Nat. Struct. Mol. Biol. 24: 370-378

  • DOI: 10.1038/nsmb.3382

  • PubMed Abstract: 
  • Binding of the gp120 envelope (Env) glycoprotein to the CD4 receptor is the first step in the HIV-1 infectious cycle. Although the CD4-binding site has been extensively characterized, the initial receptor interaction has been difficult to study becau ...

    Binding of the gp120 envelope (Env) glycoprotein to the CD4 receptor is the first step in the HIV-1 infectious cycle. Although the CD4-binding site has been extensively characterized, the initial receptor interaction has been difficult to study because of major CD4-induced structural rearrangements. Here we used cryogenic electron microscopy (cryo-EM) to visualize the initial contact of CD4 with the HIV-1 Env trimer at 6.8-Å resolution. A single CD4 molecule is embraced by a quaternary HIV-1-Env surface formed by coalescence of the previously defined CD4-contact region with a second CD4-binding site (CD4-BS2) in the inner domain of a neighboring gp120 protomer. Disruption of CD4-BS2 destabilized CD4-trimer interaction and abrogated HIV-1 infectivity by preventing the acquisition of coreceptor-binding competence. A corresponding reduction in HIV-1 infectivity occurred after the mutation of CD4 residues that interact with CD4-BS2. Our results document the critical role of quaternary interactions in the initial HIV-Env-receptor contact, with implications for treatment and vaccine design.


    Organizational Affiliation

    Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BG505 DS-SOSIP gp120
C, D, A
501Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: env
Find proteins for Q2N0S6 (Human immunodeficiency virus 1)
Go to UniProtKB:  Q2N0S6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BG505 SOSIP gp41
B, E, F
178Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: env
Find proteins for Q2N0S6 (Human immunodeficiency virus 1)
Go to UniProtKB:  Q2N0S6
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PGT145 heavy chain
H
267N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
PGT145 light chain
L
239N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
T-cell surface glycoprotein CD4
M
363Homo sapiensMutation(s): 0 
Gene Names: CD4
Find proteins for P01730 (Homo sapiens)
Go to Gene View: CD4
Go to UniProtKB:  P01730
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TYS
Query on TYS
H
L-PEPTIDE LINKINGC9 H11 N O6 STYR
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-02-22
    Type: Initial release
  • Version 1.1: 2017-03-08
    Type: Database references
  • Version 1.2: 2017-04-19
    Type: Database references
  • Version 1.3: 2018-03-07
    Type: Data collection, Structure summary