9Z0V | pdb_00009z0v

Fab structure of anti-tau monoclonal antibody 9E

• PDB DOI: https://doi.org/10.2210/pdb9Z0V/pdb

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


• Deposited: 2025-11-03 Released: 2026-10-14 
• Deposition Author(s): Pan, R., 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)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.83 Å
• R-Value Free: 
  0.220 (Depositor), 0.220 (DCC) 
• R-Value Work: 
  0.181 (Depositor), 0.182 (DCC) 
• R-Value Observed: 
  0.183 (Depositor) 

Starting Model: experimental

Literature

Tau pSer396 and pSer404 Define Distinct Epitope Regions Linked to Different Antibody Functions

Pan, R., Congdon, E.E., Chukwu, J.E., Luo, C.C., Sigurdsson, E.M., Kong, X.P.

(2026) bioRxiv 

• DOI: https://doi.org/10.64898/2026.04.16.716390

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 50.01 kDa 
• Atom Count: 3,394 
• Modeled Residue Count: 440 
• Deposited Residue Count: 455 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Light chain of Fab fragment of anti-Tau mAb 9E	A [auth L]	219	Mus musculus	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Heavy chain of Fab fragment of anti-Tau mAb 9E	B [auth H]	236	Mus musculus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	C [auth H], D [auth H], E [auth H]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.83 Å
• R-Value Free:  0.220 (Depositor), 0.220 (DCC) 
• R-Value Work:  0.181 (Depositor), 0.182 (DCC) 
• R-Value Observed: 0.183 (Depositor) 

Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 152.192	α = 90
b = 152.192	β = 90
c = 117.797	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHENIX	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-10-14 
Deposition Author(s): Pan, R., Kong, X.P.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01 NS120488
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01 NS077239
National Institutes of Health/National Institute on Aging (NIH/NIA)	United States	R01 AG032611
National Institutes of Health/National Institute on Aging (NIH/NIA)	United States	R21 AG059391

Revision History  

• Version 1.0: 2026-10-14
  Type: Initial release