6NOU

An scFv derived from ixekizumab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.914 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Development of tibulizumab, a tetravalent bispecific antibody targeting BAFF and IL-17A for the treatment of autoimmune disease.

Benschop, R.J.Chow, C.K.Tian, Y.Nelson, J.Barmettler, B.Atwell, S.Clawson, D.Chai, Q.Jones, B.Fitchett, J.Torgerson, S.Ji, Y.Bina, H.Hu, N.Ghanem, M.Manetta, J.Wroblewski, V.J.Lu, J.Allan, B.W.

(2019) Mabs 11: 1175-1190

  • DOI: 10.1080/19420862.2019.1624463
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We describe a bispecific dual-antagonist antibody against human B cell activating factor (BAFF) and interleukin 17A (IL-17). An anti-IL-17 single-chain variable fragment (scFv) derived from ixekizumab (Taltz®) was fused via a glycine-rich linker to a ...

    We describe a bispecific dual-antagonist antibody against human B cell activating factor (BAFF) and interleukin 17A (IL-17). An anti-IL-17 single-chain variable fragment (scFv) derived from ixekizumab (Taltz®) was fused via a glycine-rich linker to anti-BAFF tabalumab. The IgG-scFv bound both BAFF and IL-17 simultaneously with identical stoichiometry as the parental mAbs. Stability studies of the initial IgG-scFv revealed chemical degradation and aggregation not observed in either parental antibody. The anti-IL-17 scFv showed a high melting temperature ( Tm ) by differential scanning calorimetry (73.1°C), but also concentration-dependent, initially reversible, protein self-association. To engineer scFv stability, three parallel approaches were taken: labile complementary-determining region (CDR) residues were replaced by stable, affinity-neutral amino acids, CDR charge distribution was balanced, and a H44-L100 interface disulfide bond was introduced. The Tm of the disulfide-stabilized scFv was largely unperturbed, yet it remained monodispersed at high protein concentration. Fluorescent dye binding titrations indicated reduced solvent exposure of hydrophobic residues and decreased proteolytic susceptibility was observed, both indicative of enhanced conformational stability. Superimposition of the H44-L100 scFv (PDB id: 6NOU) and ixekizumab antigen-binding fragment (PDB id: 6NOV) crystal structures revealed nearly identical orientation of the frameworks and CDR loops. The stabilized bispecific molecule LY3090106 (tibulizumab) potently antagonized both BAFF and IL-17 in cell-based and in vivo mouse models. In cynomolgus monkey, it suppressed B cell development and survival and remained functionally intact in circulation, with a prolonged half-life. In summary, we engineered a potent bispecific antibody targeting two key cytokines involved in human autoimmunity amenable to clinical development.


    Organizational Affiliation

    d Department of Drug Disposition Development/Commercialization; Lilly Research Laboratories , Eli Lilly and Company Corporate Center , Indianapolis , IN , USA.,a Biotechnology Discovery Research, Lilly Research Laboratories , Eli Lilly and Company Corporate Center , Indianapolis , IN , USA.,c Discovery Chemistry Research and Technologies , Eli Lilly and Company Corporate Center , Indianapolis , IN , USA.,b Biotechnology Discovery Research, Applied Molecular Evolution , Eli Lilly and Company , San Diego , CA , USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
scFv derived from ixekizumab
A
256N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.914 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.180 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 94.445α = 90.00
b = 127.304β = 90.00
c = 43.023γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
BUSTERrefinement
PDB_EXTRACTdata extraction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-06-19
    Type: Initial release
  • Version 1.1: 2019-08-14
    Type: Data collection, Database references