30TO | pdb_000030to

14-3-3sigma protein binding to TSC2-strong peptide (RSH mutation) and stabilizer 3'deAc FC-A.

• PDB DOI: https://doi.org/10.2210/pdb30TO/pdb

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


• Deposited: 2026-05-13 Released: 2026-08-26 
• Deposition Author(s): Pennings, M.A.M., Brunsveld, L.
• Funding Organization(s): European Research Council (ERC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.209 (Depositor), 0.215 (DCC) 
• R-Value Work: 
  0.172 (Depositor), 0.184 (DCC) 

Starting Model: experimental

Literature

Mechanistic Insights into Molecular Glue Cooperativity: A 14-3-3 Case Study

Pennings, M.A.M., Vandenboorn, E.M.F., Nooren, L., Ottmann, C., Brunsveld, L.

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: 28.42 kDa 
• Atom Count: 2,205 
• Modeled Residue Count: 246 
• Deposited Residue Count: 246 
• 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
GTEx:  ENSG00000175793

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TSC2 peptide pS1254 wt	B	10	Homo sapiens	Mutation(s): 0

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SIT (Subject of Investigation/LOI)	C [auth A]	De-acetylated Fusicoccin C34 H54 O11 IEYDDQSCFAJEQD-AHQPFIERSA-N
CA	E [auth A], F [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL	D [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG	G [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	B	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.209 (Depositor), 0.215 (DCC) 
• R-Value Work:  0.172 (Depositor), 0.184 (DCC) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.147	α = 90
b = 111.846	β = 90
c = 62.706	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB-REDO	refinement
autoPROC	data reduction
Aimless	data scaling
MOLREP	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-08-26 
Deposition Author(s): Pennings, M.A.M., Brunsveld, L.

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Funding Organization	Location	Grant Number
European Research Council (ERC)	European Union	101098234

Revision History  

• Version 1.0: 2026-08-26
  Type: Initial release