Three-dimensional structure of two crystal forms of FabR19.9 from a monoclonal anti-arsonate antibody.Lascombe, M.B., Alzari, P.M., Poljak, R.J., Nisonoff, A.
(1992) Proc.Natl.Acad.Sci.USA 89: 9429-9433
- PubMed: 1409652
- Primary Citation of Related Structures:
- PubMed Abstract:
- Three-Dimensional Structure of Fab R19.9, A Monoclonal Murine Antibody Specific for the P-Azobenzenearsonate Group
Lascombe, M.B.,Alzari, P.M.,Boulot, G.,Saludjian, P.,Tougard, P.,Berek, C.,Haba, S.,Rosen, E.M.,Nisonoff, A.,Poljak, R.J.
(1989) Proc.Natl.Acad.Sci.USA 86: 607
- Crystallization of the Fab Fragments of Monoclonal Anti-P-Azophenylarsonate Antibodies and Their Complexes with Haptens
Mariuzza, R.A.,Amit, A.G.,Boulot, G.,Saludjian, P.,Saul, F.A.,Tougard, P.,Poljak, R.J.,Conger, J.,Lamoyi, E.,Nisonoff, A.
(1984) J.Biol.Chem. 259: 5954
The three-dimensional structure of FabR19.9 from a well-characterized anti-p-azobenzenearsonate monoclonal antibody has been determined by x-ray diffraction techniques in two crystalline forms (I and II) to a resolution of 2.8 and 2.7 A, respectively ...
The three-dimensional structure of FabR19.9 from a well-characterized anti-p-azobenzenearsonate monoclonal antibody has been determined by x-ray diffraction techniques in two crystalline forms (I and II) to a resolution of 2.8 and 2.7 A, respectively. Essentially the same tertiary and quaternary structure of the Fab is observed in the two forms. The major difference resides in the intermolecular contacts, which are interpreted to favor an irreversible transition from the metastable form I to the more stable form II. The third complementarity-determining region of the heavy chain (H3) folds back over the combining site and requires rearrangement for hapten binding. This dynamic requirement on H3 is consistent with its mobility in the structure and can explain hapten binding to an otherwise inaccessible antibody combining site.
Unite de Recherche Associée 359 Centre National de la Recherche Scientifique, Institut Pasteur, Paris, France.