9GSU | pdb_00009gsu

Structure of PP1-Neurabin bound to 4E-BP1.

• PDB DOI: https://doi.org/10.2210/pdb9GSU/pdb

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


• Deposited: 2024-09-16 Released: 2025-06-18 
• Deposition Author(s): Mouilleron, S., Treisman, R., Fedoryshchak, R., Elbouri, K.
• Funding Organization(s): The Francis Crick Institute

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.36 Å
• R-Value Free: 
  0.281 (Depositor), 0.281 (DCC) 
• R-Value Work: 
  0.242 (Depositor), 0.240 (DCC) 
• R-Value Observed: 
  0.244 (Depositor) 

Starting Model: experimental

Literature

Identification of the 4E-BPs as substrates for the Neurabin/Spinophilin PP1 holoenzyme shows how PIPs can determine PP1 substrate specificity

mouilleron, S., Treisman, R., Fedoryshchak, R., Elbouri, K.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 115.37 kDa 
• Atom Count: 6,180 
• Modeled Residue Count: 787 
• Deposited Residue Count: 1,032 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein phosphatase	A, C [auth D]	340	Homo sapiens	Mutation(s): 0  EC: 3.1.3.16
UniProt
Find proteins for A0A7J7RZV7 (Pipistrellus kuhlii) Explore A0A7J7RZV7  Go to UniProtKB:  A0A7J7RZV7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Neurabin-1	B [auth C], D [auth E]	176	Homo sapiens	Mutation(s): 0  Gene Names: PPP1R9A, KIAA1222
UniProt & NIH Common Fund Data Resources
Find proteins for Q9ULJ8 (Homo sapiens) Explore Q9ULJ8  Go to UniProtKB:  Q9ULJ8
PHAROS:  Q9ULJ8 GTEx:  ENSG00000158528

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MN (Subject of Investigation/LOI)	E [auth A], F [auth A], G [auth D], H [auth D]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.36 Å
• R-Value Free:  0.281 (Depositor), 0.281 (DCC) 
• R-Value Work:  0.242 (Depositor), 0.240 (DCC) 
• R-Value Observed: 0.244 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 104.955	α = 90
b = 130.647	β = 90
c = 156.132	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
DIALS	data reduction
xia2	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-06-18 
Deposition Author(s): Mouilleron, S., Treisman, R., Fedoryshchak, R., Elbouri, K.

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Funding Organization	Location	Grant Number
The Francis Crick Institute	United Kingdom	--

Revision History  

• Version 1.0: 2025-06-18
  Type: Initial release