4LLD

Structure of wild-type IgG1 antibody heavy chain constant domain 1 and light chain lambda constant domain (IgG1 CH1:Clambda) at 1.19A

• PDB DOI:  https://doi.org/10.2210/pdb4LLD/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2013-07-09 Released: 2014-01-29 
• Deposition Author(s): Pustilnik, A., Lewis, S.M., Wu, X., Sereno, A., Huang, F., Guntas, G., Leaver-Fay, A., Smith, E.M., Ho, C., Hansen-Estruch, C., Chamberlain, A.K., Truhlar, S.M., Kuhlman, B., Demarest, S.J., Atwell, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.19 Å
• R-Value Free: 0.170 
• R-Value Work: 0.145 
• R-Value Observed: 0.146 

Literature

Generation of bispecific IgG antibodies by structure-based design of an orthogonal Fab interface.

Lewis, S.M., Wu, X., Pustilnik, A., Sereno, A., Huang, F., Rick, H.L., Guntas, G., Leaver-Fay, A., Smith, E.M., Ho, C., Hansen-Estruch, C., Chamberlain, A.K., Truhlar, S.M., Conner, E.M., Atwell, S., Kuhlman, B., Demarest, S.J.

(2014) Nat Biotechnol 32: 191-198

• PubMed: 24463572 
• DOI: https://doi.org/10.1038/nbt.2797
• Primary Citation of Related Structures:  
  4LLD, 4LLM, 4LLQ, 4LLU, 4LLW, 4LLY


• PubMed Abstract: 
  

Robust generation of IgG bispecific antibodies has been a long-standing challenge. Existing methods require extensive engineering of each individual antibody, discovery of common light chains, or complex and laborious biochemical processing. Here we combine computational and rational design approaches with experimental structural validation to generate antibody heavy and light chains with orthogonal Fab interfaces. Parental monoclonal antibodies incorporating these interfaces, when simultaneously co-expressed, assemble into bispecific IgG with improved heavy chain-light chain pairing. Bispecific IgGs generated with this approach exhibit pharmacokinetic and other desirable properties of native IgG, but bind target antigens monovalently. As such, these bispecific reagents may be useful in many biotechnological applications.

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Organizational Affiliation: 

Eli Lilly Biotechnology Center, San Diego, California, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 25.32 kDa 
• Atom Count: 1,846 
• Modelled Residue Count: 200 
• Deposited Residue Count: 240 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ig gamma-1 chain C region	A	111	Homo sapiens	Mutation(s): 0  Gene Names: IGHG1
UniProt & NIH Common Fund Data Resources
Find proteins for P01857 (Homo sapiens) Explore P01857  Go to UniProtKB:  P01857
PHAROS:  P01857

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Ig lambda-2 chain C region	B	129	Homo sapiens	Mutation(s): 0  Gene Names: IGLC2
UniProt
Find proteins for P0DOY2 (Homo sapiens) Explore P0DOY2  Go to UniProtKB:  P0DOY2

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.19 Å
• R-Value Free: 0.170 
• R-Value Work: 0.145 
• R-Value Observed: 0.146 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.08	α = 90
b = 65.837	β = 90
c = 66.925	γ = 90

Software Package:

Software Name	Purpose
PHASER	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-01-29 
Deposition Author(s): Pustilnik, A., Lewis, S.M., Wu, X., Sereno, A., Huang, F., Guntas, G., Leaver-Fay, A., Smith, E.M., Ho, C., Hansen-Estruch, C., Chamberlain, A.K., Truhlar, S.M., Kuhlman, B., Demarest, S.J., Atwell, S.

Revision History  

• Version 1.0: 2014-01-29
  Type: Initial release
  
• Version 1.1: 2014-02-12
  Changes: Database references
• Version 1.2: 2014-03-26
  Changes: Database references
• Version 1.3: 2023-09-20
  Changes: Data collection, Database references, Refinement description