9FS4 | pdb_00009fs4

Crystal structure of 14-3-3 sigma in complex with Tau pS214 peptide and covalent stabilizer LD12

• PDB DOI: https://doi.org/10.2210/pdb9FS4/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-06-20 Released: 2025-07-02 
• Deposition Author(s): Oetelaar, M.C.M., Ottmann, C., Brunsveld, L., Engelen, S.F.H.
• Funding Organization(s): Netherlands Organisation for Scientific Research (NWO)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 
  0.198 (Depositor), 0.206 (DCC) 
• R-Value Work: 
  0.182 (Depositor), 0.195 (DCC) 
• R-Value Observed: 
  0.183 (Depositor) 

Starting Model: experimental

Literature

Site-selective stabilization of the 14-3-3/tau protein-protein interaction

Oberheide, A.O., van den Oetelaar, M.C.M., Scheele, J.J.A., Ottmann, C., Cossar, P., Brunsveld, L., Engelen, S.F.H.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C1 

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

Macromolecule Content 

• Total Structure Weight: 28.38 kDa 
• Atom Count: 2,096 
• Modeled Residue Count: 238 
• Deposited Residue Count: 249 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
14-3-3 protein sigma	A	236	Homo sapiens	Mutation(s): 0  Gene Names: SFN, HME1
UniProt & NIH Common Fund Data Resources
Find proteins for P31947 (Homo sapiens) Explore P31947  Go to UniProtKB:  P31947
PHAROS:  P31947 GTEx:  ENSG00000175793

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Microtubule-associated protein tau	B [auth P]	13	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P10636 (Homo sapiens) Explore P10636  Go to UniProtKB:  P10636
PHAROS:  P10636 GTEx:  ENSG00000186868

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TJ8 (Subject of Investigation/LOI)	C [auth A]	2-bromanyl-4-(2-phenylimidazol-1-yl)benzaldehyde C16 H11 Br N2 O XAZQMNNYMHQXBB-UHFFFAOYSA-N

Modified Residues  2 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CSO	A	L-PEPTIDE LINKING	C3 H7 N O3 S		CYS
SEP	B [auth P]	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free:  0.198 (Depositor), 0.206 (DCC) 
• R-Value Work:  0.182 (Depositor), 0.195 (DCC) 
• R-Value Observed: 0.183 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.343	α = 90
b = 112.226	β = 90
c = 62.42	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
autoPROC	data reduction
Aimless	data scaling
MOLREP	phasing
Coot	model building

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-02 
Deposition Author(s): Oetelaar, M.C.M., Ottmann, C., Brunsveld, L., Engelen, S.F.H.

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Funding Organization	Location	Grant Number
Netherlands Organisation for Scientific Research (NWO)	Netherlands	--

Revision History  

• Version 1.0: 2025-07-02
  Type: Initial release