3R1G

Structure Basis of Allosteric Inhibition of BACE1 by an Exosite-Binding Antibody


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A Therapeutic Antibody Targeting BACE1 Inhibits Amyloid-{beta} Production in Vivo.

Atwal, J.K.Chen, Y.Chiu, C.Mortensen, D.L.Meilandt, W.J.Liu, Y.Heise, C.E.Hoyte, K.Luk, W.Lu, Y.Peng, K.Wu, P.Rouge, L.Zhang, Y.Lazarus, R.A.Scearce-Levie, K.Wang, W.Wu, Y.Tessier-Lavigne, M.Watts, R.J.

(2011) Sci Transl Med 3: 84ra43-84ra43

  • DOI: https://doi.org/10.1126/scitranslmed.3002254
  • Primary Citation of Related Structures:  
    3R1G

  • PubMed Abstract: 

    Reducing production of amyloid-β (Aβ) peptide by direct inhibition of the enzymes that process amyloid precursor protein (APP) is a central therapeutic strategy for treating Alzheimer's disease. However, small-molecule inhibitors of the β-secretase (BACE1) and γ-secretase APP processing enzymes have shown a lack of target selectivity and poor penetrance of the blood-brain barrier (BBB). Here, we have developed a high-affinity, phage-derived human antibody that targets BACE1 (anti-BACE1) and is anti-amyloidogenic. Anti-BACE1 reduces endogenous BACE1 activity and Aβ production in human cell lines expressing APP and in cultured primary neurons. Anti-BACE1 is highly selective and does not inhibit the related enzymes BACE2 or cathepsin D. Competitive binding assays and x-ray crystallography indicate that anti-BACE1 binds noncompetitively to an exosite on BACE1 and not to the catalytic site. Systemic dosing of mice and nonhuman primates with anti-BACE1 resulted in sustained reductions in peripheral Aβ peptide concentrations. Anti-BACE1 also reduces central nervous system Aβ concentrations in mouse and monkey, consistent with a measurable uptake of antibody across the BBB. Thus, BACE1 can be targeted in a highly selective manner through passive immunization with anti-BACE1, providing a potential approach for treating Alzheimer's disease. Nevertheless, therapeutic success with anti-BACE1 will depend on improving antibody uptake into the brain.


  • Organizational Affiliation

    Neurodegeneration Labs, Department of Neuroscience, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-secretase 1A [auth B]402Homo sapiensMutation(s): 0 
Gene Names: BACE1BACEKIAA1149
EC: 3.4.23.46
UniProt & NIH Common Fund Data Resources
Find proteins for P56817 (Homo sapiens)
Explore P56817 
Go to UniProtKB:  P56817
PHAROS:  P56817
GTEx:  ENSG00000186318 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP56817
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
FAB of YW412.8.31 antibody heavy chainB [auth H]222Homo sapiensMutation(s): 0 
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Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
FAB of YW412.8.31 antibody light chainC [auth L]214Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.112α = 90
b = 75.537β = 99.82
c = 112.016γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance