1YYL

crystal structure of CD4M33, a scorpion-toxin mimic of CD4, in complex with HIV-1 YU2 gp120 envelope glycoprotein and anti-HIV-1 antibody 17b


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 

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This is version 2.0 of the entry. See complete history


Literature

Scorpion-toxin mimics of CD4 in complex with human immunodeficiency virus gp120 crystal structures, molecular mimicry, and neutralization breadth.

Huang, C.C.Stricher, F.Martin, L.Decker, J.M.Majeed, S.Barthe, P.Hendrickson, W.A.Robinson, J.Roumestand, C.Sodroski, J.Wyatt, R.Shaw, G.M.Vita, C.Kwong, P.D.

(2005) Structure 13: 755-768

  • DOI: 10.1016/j.str.2005.03.006
  • Primary Citation of Related Structures:  
    1YYL, 1YYM

  • PubMed Abstract: 
  • The binding surface on CD4 for the HIV-1 gp120 envelope glycoprotein has been transplanted previously onto a scorpion-toxin scaffold. Here, we use X-ray crystallography to characterize atomic-level details of gp120 with this transplant, CD4M33. Despite known envelope flexibility, the conformation of gp120 induced by CD4M33 was so similar to that induced by CD4 that localized measures were required to distinguish ligand-induced differences from lattice variation ...

    The binding surface on CD4 for the HIV-1 gp120 envelope glycoprotein has been transplanted previously onto a scorpion-toxin scaffold. Here, we use X-ray crystallography to characterize atomic-level details of gp120 with this transplant, CD4M33. Despite known envelope flexibility, the conformation of gp120 induced by CD4M33 was so similar to that induced by CD4 that localized measures were required to distinguish ligand-induced differences from lattice variation. To investigate relationships between structure, function, and mimicry, an F23 analog of CD4M33 was devised. Structural and thermodynamic analyses showed F23 to be a better molecular mimic of CD4 than CD4M33. F23 also showed increased neutralization breadth, against diverse isolates of HIV-1, HIV-2, and SIVcpz. Our results lend insight into the stability of the CD4 bound conformation of gp120, define measures that quantify molecular mimicry as a function of evolutionary distance, and suggest how such evaluations might be useful in developing mimetic antagonists with increased neutralization breadth.


    Organizational Affiliation

    Vaccine Research Center, National Institutes of Health, Bethesda, Maryland 20892, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Exterior membrane glycoprotein(GP120),Exterior membrane glycoprotein(GP120),Exterior membrane glycoprotein(GP120)A [auth G],
E [auth P]
313Human immunodeficiency virus 1Mutation(s): 0 
UniProt
Find proteins for P35961 (Human immunodeficiency virus type 1 group M subtype B (isolate YU-2))
Explore P35961 
Go to UniProtKB:  P35961
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35961
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
antibody 17b light chainB [auth L],
F [auth Q]
214Homo sapiensMutation(s): 0 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
antibody 17b heavy chainC [auth H],
G [auth R]
229Homo sapiensMutation(s): 0 
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Protein Feature View
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
CD4M33, scorpion-toxin mimic of CD4D [auth M],
H [auth S]
27synthetic constructMutation(s): 0 
Entity Groups  
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Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
BIF
Query on BIF
D [auth M],
H [auth S]
L-PEPTIDE LINKINGC15 H15 N O2PHE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.516α = 90
b = 157.841β = 93.55
c = 109.92γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-03
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2017-06-14
    Changes: Database references, Source and taxonomy, Structure summary
  • Version 1.4: 2019-12-11
    Changes: Derived calculations
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary