6B9Z

Trastuzumab Fab v3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Template-Catalyzed, Disulfide Conjugation of Monoclonal Antibodies Using a Natural Amino Acid Tag.

King, J.D.Ma, Y.Kuo, Y.C.Bzymek, K.P.Goodstein, L.H.Meyer, K.Moore, R.E.Crow, D.Colcher, D.M.Singh, G.Horne, D.A.Williams, J.C.

(2018) Bioconjug. Chem. 29: 2074-2081

  • DOI: 10.1021/acs.bioconjchem.8b00284
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The high specificity and favorable pharmacological properties of monoclonal antibodies (mAbs) have prompted significant interest in re-engineering this class of molecules to add novel functionalities for enhanced therapeutic and diagnostic potential. ...

    The high specificity and favorable pharmacological properties of monoclonal antibodies (mAbs) have prompted significant interest in re-engineering this class of molecules to add novel functionalities for enhanced therapeutic and diagnostic potential. Here, we used the high affinity, meditope-Fab interaction to template and drive the rapid, efficient, and stable site-specific formation of a disulfide bond. We demonstrate that this template-catalyzed strategy provides a consistent and reproducible means to conjugate fluorescent dyes, cytotoxins, or "click" chemistry handles to meditope-enabled mAbs (memAbs) and memFabs. More importantly, we demonstrate this covalent functionalization is achievable using natural amino acids only, opening up the opportunity to genetically encode cysteine meditope "tags" to biologics. As proof of principle, genetically encoded, cysteine meditope tags were added to the N- and/or C-termini of fluorescent proteins, nanobodies, and affibodies, each expressed in bacteria, purified to homogeneity, and efficiently conjugated to different memAbs and meFabs. We further show that multiple T-cell and Her2-targeting bispecific molecules using this strategy potently activate T-cell signaling pathways in vitro. Finally, the resulting products are highly stable as evidenced by serum stability assays (>14 d at 37 °C) and in vivo imaging of tumor xenographs. Collectively, the platform offers the opportunity to build and exchange an array of functional moieties, including protein biologics, among any cysteine memAb or Fab to rapidly create, test, and optimize stable, multifunctional biologics.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Trastuzumab Fab light chain
A
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Trastuzumab Fab heavy chain
B
223N/AMutation(s): 2 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Protein L
E
64Finegoldia magnaMutation(s): 5 
Find proteins for Q51918 (Finegoldia magna)
Go to UniProtKB:  Q51918
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Immunoglobulin G binding protein A
C
54Staphylococcus aureus (strain NCTC 8325)Mutation(s): 0 
Gene Names: spa
Find proteins for P02976 (Staphylococcus aureus (strain NCTC 8325))
Go to UniProtKB:  P02976
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
B
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 53.490α = 90.00
b = 105.290β = 90.00
c = 117.150γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXrefinement
MOLREPphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-09-05
    Type: Initial release