6BRB

Novel non-antibody protein scaffold targeting CD40L

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.82 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.230 

wwPDB Validation   3D Report Full Report



Literature

A CD40L-targeting protein reduces autoantibodies and improves disease activity in patients with autoimmunity.

Karnell, J.L., Albulescu, M., Drabic, S., Wang, L., Moate, R., Baca, M., Oganesyan, V., Gunsior, M., Thisted, T., Yan, L., Li, J., Xiong, X., Eck, S.C., de Los Reyes, M., Yusuf, I., Streicher, K., Muller-Ladner, U., Howe, D., Ettinger, R., Herbst, R., Drappa, J.

(2019) Sci Transl Med 11

  • DOI: 10.1126/scitranslmed.aar6584
  • Primary Citation of Related Structures:  
    6BRB

  • PubMed Abstract: 

    • The CD40/CD40L axis plays a central role in the generation of humoral immune responses and is an attractive target for treating autoimmune diseases in the clinic. Here, we report the generation and clinical results of a CD40L binding protein, VIB4920, wh ...

    The CD40/CD40L axis plays a central role in the generation of humoral immune responses and is an attractive target for treating autoimmune diseases in the clinic. Here, we report the generation and clinical results of a CD40L binding protein, VIB4920, which lacks an Fc domain, therefore avoiding platelet-related safety issues observed with earlier monoclonal antibody therapeutics that targeted CD40L. VIB4920 blocked downstream CD40 signaling events, resulting in inhibition of human B cell activation and plasma cell differentiation, and did not induce platelet aggregation in preclinical studies. In a phase 1 study in healthy volunteers, VIB4920 suppressed antigen-specific IgG in a dose-dependent fashion after priming and boosting with the T-dependent antigen, KLH. Furthermore, VIB4920 significantly reduced circulating Ki67 + dividing B cells, class-switched memory B cells, and a plasma cell gene signature after immunization. In a phase 1b proof-of-concept study in patients with rheumatoid arthritis, VIB4920 significantly decreased disease activity, achieving low disease activity or clinical remission in more than 50% of patients in the two higher-dose groups. Dose-dependent decreases in rheumatoid factor autoantibodies and Vectra DA biomarker score provide additional evidence that VIB4920 effectively blocked the CD40/CD40L pathway. VIB4920 demonstrated a good overall safety profile in both clinical studies. Together, these data demonstrate the potential of VIB4920 to significantly affect autoimmune disease and humoral immune activation and to support further evaluation of this molecule in inflammatory conditions.

    Organizational Affiliation: 

    Viela Bio, Gaithersburg, MD 20878, USA. herbstro@medimmune.com drappaj@vielabio.com.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CD40 ligand A142Homo sapiensMutation(s): 0 
Gene Names: CD40LG, CD40L, TNFSF5, TRAP
Find proteins for P29965 (Homo sapiens)
Explore P29965 
Go to UniProtKB:  P29965
NIH Common Fund Data Resources
PHAROS:  P29965
GTEx:  ENSG00000102245
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tn3-like D87Escherichia coliMutation(s): 0 
Find proteins for P24821 (Homo sapiens)
Explore P24821 
Go to UniProtKB:  P24821
NIH Common Fund Data Resources
PHAROS:  P24821
GTEx:  ENSG00000041982
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
3 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.82 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.230 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.528α = 90
b = 93.528β = 90
c = 66.685γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-12-05
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary