Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47783.39 
• Atom Count: 3338 
• Residue Count: 438 
• Unique protein chains: 2

1UCB

STRUCTURE OF UNCOMPLEXED FAB COMPARED TO COMPLEX (1CLY, 1CLZ)

• DOI: 10.2210/pdb1UCB/pdb

• Classification: IMMUNOGLOBULIN
• Organism(s): Homo sapiens
• Expression System: Mus musculus


• Deposited: 1996-02-06 Released: 1997-03-12 
• Deposition Author(s): Sheriff, S., Bajorath, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Free: 0.276 
• R-Value Work: 0.200 

Literature

X-ray structure of the uncomplexed anti-tumor antibody BR96 and comparison with its antigen-bound form.

Sheriff, S., Chang, C.Y., Jeffrey, P.D., Bajorath, J.

(1996) J.Mol.Biol. 259: 938-946

• PubMed: 8683596 
• DOI: 10.1006/jmbi.1996.0371


• PubMed Abstract: 
  

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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Related Citations: 

• Crystallization and Preliminary X-Ray Analysis of the Monoclonal Anti-Tumor Antibody Br96 and its Complex with the Lewis Y Determinant
  Chang, C.Y.,Jeffrey, P.D.,Bajorath, J.,Hellstrom, I.,Hellstrom, K.E.,Sheriff, S.
  (1994) J.Mol.Biol. 235: 372




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Organizational Affiliation: 

Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, NJ 08543-4000, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CHIMERIC HUMAN/MOUSE IGG FAB FRAGMENT BR96	L	219	Homo sapiens	Mutation(s): 0  Gene Names: IGKC
Find proteins for P01834 (Homo sapiens) Go to UniProtKB:  P01834

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
CHIMERIC HUMAN/MOUSE IGG FAB FRAGMENT BR96	H	219	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	L	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Free: 0.276 
• R-Value Work: 0.200 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 61.100	α = 90.00
b = 174.300	β = 90.00
c = 45.600	γ = 90.00

Software Package:

Software Name	Purpose
XDS	data reduction
X-PLOR	refinement
BRUTE	phasing
XSCALE	data scaling
BRUTE	model building
XDS	data scaling
MERLOT	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-02-06 
• Released Date: 1997-03-12 
• Deposition Author(s): Sheriff, S., Bajorath, J.

Revision History 

• Version 1.0: 1997-03-12
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance