5FCU

CRYSTAL STRUCTURE OF THE INNER DOMAIN OF CLADE A/E HIV-1 GP120 IN COMPLEX WITH THE ADCC-POTENT RHESUS MACAQUE ANTIBODY JR4

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 

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Literature

Paring Down HIV Env: Design and Crystal Structure of a Stabilized Inner Domain of HIV-1 gp120 Displaying a Major ADCC Target of the A32 Region.

Tolbert, W.D., Gohain, N., Veillette, M., Chapleau, J.P., Orlandi, C., Visciano, M.L., Ebadi, M., DeVico, A.L., Fouts, T.R., Finzi, A., Lewis, G.K., Pazgier, M.

(2016) Structure 24: 697-709

  • DOI: 10.1016/j.str.2016.03.005
  • Primary Citation of Related Structures:  
    4YBL, 4YC2, 5FCU

  • PubMed Abstract: 

    • Evidence supports a role of antibody-dependent cellular cytotoxicity (ADCC) toward transitional epitopes in the first and second constant (C1-C2) regions of gp120 (A32-like epitopes) in preventing HIV-1 infection and in vaccine-induced protection. Here, we describe the first successful attempt at isolating the inner domain (ID) of gp120 as an independent molecule that encapsulates the A32-like region within a minimal structural unit of the HIV-1 Env ...

    Evidence supports a role of antibody-dependent cellular cytotoxicity (ADCC) toward transitional epitopes in the first and second constant (C1-C2) regions of gp120 (A32-like epitopes) in preventing HIV-1 infection and in vaccine-induced protection. Here, we describe the first successful attempt at isolating the inner domain (ID) of gp120 as an independent molecule that encapsulates the A32-like region within a minimal structural unit of the HIV-1 Env. Through structure-based design, we developed ID2, which consists of the ID expressed independently of the outer domain and stabilized in the CD4-bound conformation by an inter-layer disulfide bond. ID2 expresses C1-C2 epitopes in the context of CD4-triggered full-length gp120 but without any known neutralizing epitope present. Thus, ID2 represents a novel probe for the analysis and/or selective induction of antibody responses to the A32 epitope region. We also present the crystal structure of ID2 complexed with mAb A32, which defines its epitope.

    Organizational Affiliation: 

    Division of Vaccine Research, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA. Electronic address: mpazgier@ihv.umaryland.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
clade A/E 93TH057 HIV-1 gp120 coreA [auth G]169Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: HIV-1 Env
UniProt
Find proteins for A0A0M3KKW9 (Human immunodeficiency virus 1)
Explore A0A0M3KKW9 
Go to UniProtKB:  A0A0M3KKW9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0M3KKW9
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
JR4 FAB HEAVY CHAINB [auth H]233Macaca mulattaMutation(s): 0 
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Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
JR4 FAB LIGHT CHAINC [auth L]216Macaca mulattaMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.447α = 90
b = 89.848β = 90
c = 180.783γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
REFMACrefinement

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Bill & Melinda Gates FoundationUnited StatesOPP1033109

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2016-06-22
    Changes: Data collection, Database references
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary