1NC4

Crystal Structure of Monoclonal Antibody 2D12.5 Fab Complexed with Gd-DOTA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of two complexes of the rare-earth-DOTA-binding antibody 2D12.5: ligand generality from a chiral system.

Corneillie, T.M.Fisher, A.J.Meares, C.F.

(2003) J.Am.Chem.Soc. 125: 15039-15048

  • DOI: 10.1021/ja037236y
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report the crystal structures of antibody 2D12.5 Fab bound to an yttrium-DOTA analogue and separately to a gadolinium-DOTA analogue. The rare earth elements have many useful properties as probes, and 2D12.5 binds the DOTA (1,4,7,10-tetraazacyclodo ...

    We report the crystal structures of antibody 2D12.5 Fab bound to an yttrium-DOTA analogue and separately to a gadolinium-DOTA analogue. The rare earth elements have many useful properties as probes, and 2D12.5 binds the DOTA (1,4,7,10-tetraazacyclododecane-N,N',N' ',N' "-tetraacetic acid) complexes of all of them (Corneillie et al. J. Am. Chem. Soc. 2003, 125, 3436-3437). The structures show that there are no direct protein-metal interactions: a bridging water acts as a link between the protein and metal, with the chelate present as the M isomer in each case. DOTA forms an amphipathic cylinder with the charged carboxylate groups toward the face of the chelate near the metal ion, while nonpolar methylene groups from the macrocycle and the carboxymethyl groups occupy the rear and sides of the molecule. The orientation of the metal-DOTA in the 2D12.5 complex places most of the methylene carbon atoms of DOTA in hydrophobic contact with aromatic protein side chains. Other binding interactions between the metal complex and the antibody include a bidentate salt bridge, four direct H-bonds, and four to five water-mediated H-bonds. We find that 2D12.5 exhibits enantiomeric binding generality, binding yttrium chelates in both Lambda(deltadeltadeltadelta) and Delta(lambdalambdalambdalambda) configurations with modestly different affinities. This develops from the symmetrical nature of the DOTA chelate, which places heteroatoms and hydrophobic atoms in approximately the same relative positions regardless of the helicity of DOTA.


    Organizational Affiliation

    Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MONOCLONAL ANTIBODY 2D12.5, LAMBDA LIGHT CHAIN
A, C
215N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MONOCLONAL ANTIBODY 2D12.5, IGG1 GAMMA HEAVY CHAIN
B
221N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
MONOCLONAL ANTIBODY 2D12.5, IGG1 GAMMA HEAVY CHAIN
D
221N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DOF
Query on DOF

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B, D
(S)-2-(4-NITROBENZYL)-1,4,7,10-TETRAAZACYCLODODECANE-N,N',N'',N'''-TETRAACETATE
C23 H33 N5 O10
SQWOBSHRAUJBNP-IBGZPJMESA-N
 Ligand Interaction
CL
Query on CL

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A, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GD3
Query on GD3

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B, D
GADOLINIUM ION
Gd
RJOJUSXNYCILHH-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
B
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 67.569α = 90.00
b = 82.239β = 90.00
c = 160.934γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance