1QFW

TERNARY COMPLEX OF HUMAN CHORIONIC GONADOTROPIN WITH FV ANTI ALPHA SUBUNIT AND FV ANTI BETA SUBUNIT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.260 
  • R-Value Observed: 0.260 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal structure of a ternary complex between human chorionic gonadotropin (hCG) and two Fv fragments specific for the alpha and beta-subunits.

Tegoni, M.Spinelli, S.Verhoeyen, M.Davis, P.Cambillau, C.

(1999) J Mol Biol 289: 1375-1385

  • DOI: 10.1006/jmbi.1999.2845
  • Primary Citation of Related Structures:  
    1QFW

  • PubMed Abstract: 
  • Human chorionic gonadotropin (hCG), is a placental hormone which exerts its major effect by stimulating progesterone production, crucially sustaining the early weeks of pregnancy. Detection of hCG with specific monoclonal antibodies (mAbs) has become the ...

    Human chorionic gonadotropin (hCG), is a placental hormone which exerts its major effect by stimulating progesterone production, crucially sustaining the early weeks of pregnancy. Detection of hCG with specific monoclonal antibodies (mAbs) has become the chosen means for pregnancy diagnosis. We have used antibody Fv fragments derived from two high-affinity mAbs, one against the alpha and the other against the beta-hCG subunit to enable the crystallisation of intact or desialylated hCG. Crystals of a ternary complex composed of Fv anti-alpha/hCG/Fv anti-beta were found to diffract to 3.5 A resolution, and the structure was solved by molecular replacement. In the crystal, the two Fvs keep hCG as in a molecular cage, providing good protein-protein contacts and leaving enough space for the saccharides to be accommodated in the cell solvent. The two Fvs were found not to interact directly through their complementary-determining regions with the hCG saccharides, but only with the protein. The hCG structure in the ternary complex was very close to that of the HF partially deglycosylated hormone, thus indicating that neither the saccharides nor the Fvs had any substantial influence on hormone structure.


    Related Citations: 
    • Partially deglycosylated human choriogonadotropin, stabilized by intersubunit disulfide bonds, shows full bioactivity.
      Heikoop, J.C., van den Boogaart, P., de Leeuw, R., Rose, U.M., Mulders, J.W., Grootenhuis, P.D.
      (1998) Eur J Biochem 253: 354
    • Crystal structure of human chorionic gonadotropin.
      Lapthorn, A.J., Harris, D.C., Littlejohn, A., Lustbader, J.W., Canfield, R.E., Machin, K.J., Morgan, F.J., Isaacs, N.W.
      (1994) Nature 369: 455
    • Structure of human chorionic gonadotropin at 2.6 A resolution from MAD analysis of the selenomethionyl protein.
      Wu, H., Lustbader, J.W., Liu, Y., Canfield, R.E., Hendrickson, W.A.
      (1994) Structure 2: 545
    • Crystallization and characterization of human chorionic gonadotropin in chemically deglycosylated and enzymatically desialylated states.
      Lustbader, J.W., Birken, S., Pileggi, N.F., Kolks, M.A., Pollak, S., Cuff, M.E., Yang, W., Hendrickson, W.A., Canfield, R.E.
      (1989) Biochemistry 28: 9239
    • Site specificity of the chorionic gonadotropin N-linked oligosaccharides in signal transduction.
      Matzuk, M.M., Keene, J.L., Boime, I.
      (1989) J Biol Chem 264: 2409
    • Role of carbohydrate of human chorionic gonadotropin in the mechanism of hormone action.
      Moyle, W.R., Bahl, O.P., Marz, L.
      (1975) J Biol Chem 250: 9163

    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques UPR 9039, CNRS, IFR1, 31 Chemin Joseph Aiguier, Marseille Cedex 20, 13402, France.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GONADOTROPIN ALPHA SUBUNIT A92Homo sapiensMutation(s): 0 
Gene Names: CGA
Find proteins for P01215 (Homo sapiens)
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NIH Common Fund Data Resources
PHAROS:  P01215
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GONADOTROPHIN BETA SUBUNIT B145Homo sapiensMutation(s): 0 
Gene Names: CGB3CGBCGB5CGB8
Find proteins for P0DN86 (Homo sapiens)
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PHAROS:  P0DN86
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ANTIBODY (ANTI ALPHA SUBUNIT) (LIGHT CHAIN) L114Mus musculusMutation(s): 0 
Find proteins for P01660 (Mus musculus)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
ANTIBODY (ANTI ALPHA SUBUNIT) (HEAVY CHAIN) H117Mus musculusMutation(s): 0 
Find proteins for P01750 (Mus musculus)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
ANTIBODY (ANTI BETA SUBUNIT) (LIGHT CHAIN) M108Mus musculusMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
ANTIBODY (ANTI BETA SUBUNIT) (HEAVY CHAIN) I122Mus musculusMutation(s): 0 
Find proteins for P18526 (Mus musculus)
Explore P18526 
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Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.260 
  • R-Value Observed: 0.260 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.9α = 90
b = 104.9β = 90
c = 150.1γ = 120
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-26
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2019-11-27
    Changes: Advisory, Database references, Derived calculations
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary