1UCB image
Deposition Date 1996-02-06
Release Date 1997-03-12
Last Version Date 2024-11-20
Entry Detail
PDB ID:
1UCB
Keywords:
IMMUNOGLOBULIN
Title:
STRUCTURE OF UNCOMPLEXED FAB COMPARED TO COMPLEX (1CLY, 1CLZ)
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Mus musculus
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.27
R-Value Work:
0.2
R-Value Observed:
0.2
Space Group:
P 21 21 2
1UCB validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:CHIMERIC HUMAN/MOUSE IGG FAB FRAGMENT BR96
Chain IDs:B (auth: H)
Chain Length:219
Number of Molecules:1
Biological Source:Homo sapiens
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:CHIMERIC HUMAN/MOUSE IGG FAB FRAGMENT BR96
Gene (Uniprot):IGKC
Chain IDs:A (auth: L)
Chain Length:219
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01834 Pfam ID:PF07654
Ligand Molecules
SO4
Primary Citation
X-ray structure of the uncomplexed anti-tumor antibody BR96 and comparison with its antigen-bound form.
J.Mol.Biol. 259 938 946 (1996)
PMID: 8683596 DOI: 10.1006/jmbi.1996.0371

Abstact

The X-ray structure of the uncomplexed human chimeric Fab' of the anti-tumor antibody BR96 has been determined at 2.6 A resolution. The structure has been compared with Lewis Y antigen-complexed structures of BR96 which were determined previously. The comparison reveals segmental motions and/or conformational rearrangements of three CDR loops (L1, L3, and H2), whereas CDR H3 does not undergo changes upon complexation despite its significant main-chain contacts to the carbohydrate antigen. In light of the uncomplexed chimeric Fab' structure reported here, the previously observed high mobility of the CL:CH1 domains of the complexed chimeric BR96 Fab is rationalized as a "swinging" motion approximately about the axis of the elbow bend.

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Primary Citation of related structures
1UCB