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: 3.5 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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 ...

    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: 
    • Crystal Structure of Human Chorionic Gonadotropin
      Lapthorn, A.J.,Isaac, N.W.
      (1994) Nature 369: 455
    • Role of the Carbohydrate of Human Chorionic Gonadotropinn in the Mechanism of Hormone Action
      Moyle, W.R.,Bahl, O.P.,Mrz, L.
      (1975) J.Biol.Chem. 250: 9163
    • Partially Deglycosylated Human Chorioganadotropin, Stabilized by Intersubunit Disulfide Bonds, Shows Full Bioactivity
      Heikoop, J.C.,Van Den Boogaart, P.,De Leeuw, R.,Rosej, U.M.,Mulders, W.M.,Grootenhuis, P.D.J.
      (1998) Eur.J.Biochem. 253: 354
    • Structure of Human Chorionic Gonadotropin at 2.6 Resolution from MAD Analysis of the Selenomethionyl Protein
      Wu, H.,Lustbader, J.W.,Liu, Y.,Canfield, R.E.,Hendrikson, W.A.
      (1994) Structure 2: 545
    • 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
    • Crystallization and Characterization of Human Chorionic Gonadotropin in Chemically Deglycosylated and Enzymatically Desialylated States
      Hendrickson, W.A.,Canfield, R.E.
      (1989) Biochemistry 28: 9239


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GONADOTROPIN ALPHA SUBUNIT
A
92Homo sapiensGene Names: CGA
Find proteins for P01215 (Homo sapiens)
Go to Gene View: CGA
Go to UniProtKB:  P01215
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
GONADOTROPHIN BETA SUBUNIT
B
145Homo sapiensGene Names: CGB3, CGB5, CGB8 (CGB)
Find proteins for P0DN86 (Homo sapiens)
Go to Gene View: CGB3 CGB5 CGB8
Go to UniProtKB:  P0DN86
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ANTIBODY (ANTI ALPHA SUBUNIT) (LIGHT CHAIN)
L
114Mus musculus
Find proteins for P01660 (Mus musculus)
Go to UniProtKB:  P01660
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
ANTIBODY (ANTI ALPHA SUBUNIT) (HEAVY CHAIN)
H
117Mus musculus
Find proteins for P01750 (Mus musculus)
Go to UniProtKB:  P01750
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
ANTIBODY (ANTI BETA SUBUNIT) (LIGHT CHAIN)
M
108Mus musculus
Find proteins for P01660 (Mus musculus)
Go to UniProtKB:  P01660
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
ANTIBODY (ANTI BETA SUBUNIT) (HEAVY CHAIN)
I
122Mus musculus
Find proteins for P18526 (Mus musculus)
Go to UniProtKB:  P18526
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.260 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 104.900α = 90.00
b = 104.900β = 90.00
c = 150.100γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
SCALEPACKdata scaling
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-26
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance