6BB4

Fab/epitope complex of mouse monoclonal antibody C5.2 targeting a phospho-tau epitope.

  • Classification: IMMUNE SYSTEM
  • Organism(s): Mus musculus, Homo sapiens
  • Mutation(s): No 

  • Deposited: 2017-10-16 Released: 2018-05-02 
  • Deposition Author(s): Chukwu, J.E., Kong, X.-P.
  • Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS), National Institutes of Health/National Institute on Aging (NIH/NIA)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Tau Antibody Structure Reveals a Molecular Switch Defining a Pathological Conformation of the Tau Protein.

Chukwu, J.E., Pedersen, J.T., Pedersen, L.O., Volbracht, C., Sigurdsson, E.M., Kong, X.P.

(2018) Sci Rep 8: 6209-6209

  • DOI: 10.1038/s41598-018-24276-4
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • Tau antibodies have shown therapeutic potential for Alzheimer's disease and several are in clinical trials. As a microtubule-associated protein, tau relies on dynamic phosphorylation for its normal functions. In tauopathies, it becomes hyperphosphory ...

    Tau antibodies have shown therapeutic potential for Alzheimer's disease and several are in clinical trials. As a microtubule-associated protein, tau relies on dynamic phosphorylation for its normal functions. In tauopathies, it becomes hyperphosphorylated and aggregates into toxic assemblies, which collectively lead to neurodegeneration. Of the phospho-epitopes, the region around Ser396 has received particular attention because of its prominence and stability in tauopathies. Here we report the first structure of a monoclonal tau antibody in complex with the pathologically important phospho-Ser396 residue. Its binding region reveals tau residues Tyr394 to phospho-Ser396 stabilized in a β-strand conformation that is coordinated by a phospho-specific antigen binding site. These details highlight a molecular switch that defines this prominent conformation of tau and ways to target it. Overall, the structure of the antibody-antigen complex clarifies why certain phosphorylation sites in tau are more closely linked to neurodegeneration than others.

    Organizational Affiliation: 

    Departments of Biochemistry & Molecular Pharmacology, New York University School of Medicine, New York, NY, USA. xiangpeng.kong@med.nyu.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mouse monoclonal antibody C5.2 Fab light chainL, M, N213Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Mouse monoclonal antibody C5.2 Fab heavy chainH, I, J220Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Microtubule-associated protein tauP, Q, R23Homo sapiensMutation(s): 0 
Gene Names: MAPT, MAPTL, MTBT1, TAU
Find proteins for P10636 (Homo sapiens)
Explore P10636 
Go to UniProtKB:  P10636
NIH Common Fund Data Resources
PHAROS  P10636
GTEx  ENSG00000186868
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4
Download CCD File 
H, I, J
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP		P,Q,RL-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.218 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 161.156α = 90
b = 40.535β = 104.07
c = 228.064γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing
Cootmodel building

Structure Validation

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View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesNS077239
National Institutes of Health/National Institute on Aging (NIH/NIA)United StatesAG032611

Revision History 

  • Version 1.0: 2018-05-02
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Author supporting evidence