4O02

AlphaVBeta3 integrin in complex with monoclonal antibody FAB fragment.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.250 

wwPDB Validation   3D Report Full Report



Literature

Atomic basis for the species-specific inhibition of alpha V integrins by monoclonal antibody 17E6 is revealed by the crystal structure of alpha V beta 3 ectodomain-17E6 Fab complex.

Mahalingam, B.Van Agthoven, J.F.Xiong, J.P.Alonso, J.L.Adair, B.D.Rui, X.Anand, S.Mehrbod, M.Mofrad, M.R.Burger, C.Goodman, S.L.Arnaout, M.A.

(2014) J Biol Chem 289: 13801-13809

  • DOI: 10.1074/jbc.M113.546929
  • Primary Citation of Related Structures:  
    4O02

  • PubMed Abstract: 
  • The function-blocking, non-RGD-containing, and primate-specific mouse monoclonal antibody 17E6 binds the αV subfamily of integrins. 17E6 is currently in phase II clinical trials for treating cancer. To elucidate the structural basis of recognition an ...

    The function-blocking, non-RGD-containing, and primate-specific mouse monoclonal antibody 17E6 binds the αV subfamily of integrins. 17E6 is currently in phase II clinical trials for treating cancer. To elucidate the structural basis of recognition and the molecular mechanism of inhibition, we crystallized αVβ3 ectodomain in complex with the Fab fragment of 17E6. Protein crystals grew in presence of the activating cation Mn(2+). The integrin in the complex and in solution assumed the genuflected conformation. 17E6 Fab bound exclusively to the Propeller domain of the αV subunit. At the core of αV-Fab interface were interactions involving Propeller residues Lys-203 and Gln-145, with the latter accounting for primate specificity. The Propeller residue Asp-150, which normally coordinates Arg of the ligand Arg-Gly-Asp motif, formed contacts with Arg-54 of the Fab that were expected to reduce soluble FN10 binding to cellular αVβ3 complexed with 17E6. This was confirmed in direct binding studies, suggesting that 17E6 is an allosteric inhibitor of αV integrins.


    Organizational Affiliation

    From the Structural Biology Program and the Leukocyte Biology and Inflammation Program, Departments of Medicine and Developmental & Regenerative Biology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts 02129, aarnaout1@mgh.harvard.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Integrin alpha-VA962Homo sapiensMutation(s): 0 
Gene Names: ITGAVMSK8VNRAVTNR
Find proteins for P06756 (Homo sapiens)
Explore P06756 
Go to UniProtKB:  P06756
NIH Common Fund Data Resources
PHAROS  P06756
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Integrin beta-3B692Homo sapiensMutation(s): 0 
Gene Names: ITGB3GP3A
Find proteins for P05106 (Homo sapiens)
Explore P05106 
Go to UniProtKB:  P05106
NIH Common Fund Data Resources
PHAROS  P05106
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
17E6 light chainL214Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
17E6 heavy chainH218Mus musculusMutation(s): 0 
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  • Reference Sequence
Oligosaccharides

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Entity ID: 5
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
6 N-Glycosylation Oligosaccharides Interaction
Entity ID: 6
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D
3 N-Glycosylation Oligosaccharides Interaction
Entity ID: 7
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
E
6 N-Glycosylation Oligosaccharides Interaction
Entity ID: 8
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
F, I, J
2 N-Glycosylation Oligosaccharides Interaction
Entity ID: 9
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
G
6 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.250 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.464α = 90
b = 266.988β = 90
c = 102.163γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-02
    Type: Initial release
  • Version 1.1: 2015-02-25
    Changes: Database references, Derived calculations
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary