6CT7

Fab of anti-a-synuclein antibody BIIB054 in complex with acetylated a-synuclein peptide (1-10)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.903 Å
  • R-Value Free: 0.223 
  • 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 an aggregate-selective, human-derived alpha-synuclein antibody BIIB054 that ameliorates disease phenotypes in Parkinson's disease models.

Weihofen, A.Liu, Y.Arndt, J.W.Huy, C.Quan, C.Smith, B.A.Baeriswyl, J.L.Cavegn, N.Senn, L.Su, L.Marsh, G.Auluck, P.K.Montrasio, F.Nitsch, R.M.Hirst, W.D.Cedarbaum, J.M.Pepinsky, R.B.Grimm, J.Weinreb, P.H.

(2018) Neurobiol. Dis. 124: 276-288

  • DOI: 10.1016/j.nbd.2018.10.016

  • PubMed Abstract: 
  • Aggregation of α-synuclein (α-syn) is neuropathologically and genetically linked to Parkinson's disease (PD). Since stereotypic cell-to-cell spreading of α-syn pathology is believed to contribute to disease progression, immunotherapy with antibodies ...

    Aggregation of α-synuclein (α-syn) is neuropathologically and genetically linked to Parkinson's disease (PD). Since stereotypic cell-to-cell spreading of α-syn pathology is believed to contribute to disease progression, immunotherapy with antibodies directed against α-syn is considered a promising therapeutic approach for slowing disease progression. Here we report the identification, binding characteristics, and efficacy in PD mouse models of the human-derived α-syn antibody BIIB054, which is currently under investigation in a Phase 2 clinical trial for PD. BIIB054 was generated by screening human memory B-cell libraries from healthy elderly individuals. Epitope mapping studies conducted using peptide scanning, X-ray crystallography, and mutagenesis show that BIIB054 binds to α-syn residues 1-10. BIIB054 is highly selective for aggregated forms of α-syn with at least an 800-fold higher apparent affinity for fibrillar versus monomeric recombinant α-syn and a strong preference for human PD brain tissue. BIIB054 discriminates between monomers and oligomeric/fibrillar forms of α-syn based on high avidity for aggregates, driven by weak monovalent affinity and fast binding kinetics. In efficacy studies in three different mouse models with intracerebrally inoculated preformed α-syn fibrils, BIIB054 treatment attenuated the spreading of α-syn pathology, rescued motor impairments, and reduced the loss of dopamine transporter density in dopaminergic terminals in striatum. The preclinical data reported here provide a compelling rationale for clinical development of BIIB054 for the treatment and prevention of PD.


    Organizational Affiliation

    Neurimmune AG, Wagistrasse 13, 8952 Schlieren, Switzerland; Institute for Regenerative Medicine, University of Zurich, Wagistrasse 12, 8952 Schlieren, Switzerland.,Biogen, 225 Binney Street, Cambridge, MA 02142, USA; Neurimmune AG, Wagistrasse 13, 8952 Schlieren, Switzerland. Electronic address: andreas.weihofen@biogen.com.,Biogen, 225 Binney Street, Cambridge, MA 02142, USA.,Neurimmune AG, Wagistrasse 13, 8952 Schlieren, Switzerland.,Biogen, 225 Binney Street, Cambridge, MA 02142, USA. Electronic address: paul.weinreb@biogen.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BIIB054 Fab light chain
L, B
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BIIB054 Fab heavy chain
H, A
220N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ACE-MET-ASP-VAL-PHE-MET-LYS-GLY-LEU-SER-LYS
S, T
11Homo sapiensMutation(s): 0 
Gene Names: SNCA (NACP, PARK1)
Find proteins for P37840 (Homo sapiens)
Go to Gene View: SNCA
Go to UniProtKB:  P37840
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IPA
Query on IPA

Download SDF File 
Download CCD File 
B, H, L
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
S, T
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.903 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 72.849α = 90.00
b = 101.492β = 117.30
c = 73.400γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2018-03-22 
  • Released Date: 2018-12-19 
  • Deposition Author(s): Arndt, J.W.

Revision History 

  • Version 1.0: 2018-12-19
    Type: Initial release
  • Version 1.1: 2018-12-26
    Type: Data collection, Database references