8FAB

CRYSTAL STRUCTURE OF THE FAB FRAGMENT FROM THE HUMAN MYELOMA IMMUNOGLOBULIN IGG HIL AT 1.8 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Work: 0.173 
  • R-Value Observed: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Three-dimensional structure of murine anti-p-azophenylarsonate Fab 36-71. 1. X-ray crystallography, site-directed mutagenesis, and modeling of the complex with hapten.

Strong, R.K.Campbell, R.Rose, D.R.Petsko, G.A.Sharon, J.Margolies, M.N.

(1991) Biochemistry 30: 3739-3748

  • DOI: 10.1021/bi00229a022
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The structure of the antigen-binding fragment (Fab) of an anti-p-azophenylarsonate monoclonal antibody, 36-71, bearing a major cross-reactive idiotype of A/J mice has been refined to an R factor of 24.8% at a resolution of 1.85 A. The previously solv ...

    The structure of the antigen-binding fragment (Fab) of an anti-p-azophenylarsonate monoclonal antibody, 36-71, bearing a major cross-reactive idiotype of A/J mice has been refined to an R factor of 24.8% at a resolution of 1.85 A. The previously solved partial structure of this Fab at a resolution of 2.9 A (Rose et al., 1990) was used as an initial model for refinement against the high-resolution data. The complex with hapten has been modeled by docking the small-molecule crystal structure of phenylarsonic acid into the structure of the native Fab on the basis of a low-resolution electron density map of the complex. In this model, residue Arg-96 in the light chain and residues Asn-35, Trp-47, and Ser-99 in the heavy chain contact the arsonate moiety of the hapten; an additional bond is found between the arsonate group and a tightly bound water molecule. The phenyl moiety of the hapten packs against two tyrosine side chains at positions 50 and 106 in the heavy chain. Residue Arg-96 in the light chain had been implicated as involved in hapten binding on the basis of previous experiments, and indeed, this residue appears to play a crucial role in this model. Experiments employing site-directed mutagenesis directly support this conclusion. The heavy-chain complementarity-determining regions have novel conformations not previously observed in immunoglobulins except for the recently solved anti-p-azophenylarsonate Fab R 19.9 (Lascombe et al., 1989).


    Related Citations: 
    • Amino Acid Sequence of the VH Region of Human Myeloma Cryoimmunoglobulin Igg Hil
      Chiu, Y.-Y.H., Lopez De Castro, J.A., Poljak, R.J.
      (1979) Biochemistry 18: 553
    • Amino Acid Sequence of the Variable Region of the Light (Lambda) Chain from Human Myeloma Cryoimmunoglobulin Igg Hil
      Lopez De Castro, J.A., Chiu, Y.-Y.H., Poljak, R.J.
      (1978) Biochemistry 17: 1718
    • Crystals of Fragment Fab': Preparation from Pepsin Digests of Human Igg Myeloma Proteins
      Rossi, G., Choi, T.K., Nisonoff, A.
      (1969) Nature 223: 837

    Organizational Affiliation

    California Institute of Technology, Pasadena 91125.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IGG1-LAMBDA HIL FAB (LIGHT CHAIN)A, C212Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
IGG1-LAMBDA HIL FAB (HEAVY CHAIN)B, D224Homo sapiensMutation(s): 0 
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Work: 0.173 
  • R-Value Observed: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.6α = 90
b = 127.42β = 90
c = 66.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance