6GHM | pdb_00006ghm

Structure of PP1 alpha phosphatase bound to ASPP2

• PDB DOI: https://doi.org/10.2210/pdb6GHM/pdb

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


• Deposited: 2018-05-08 Released: 2019-02-27 
• Deposition Author(s): Mouilleron, S., Bertran, T.M., Tapon, N., Zhou, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 
  0.214 (Depositor), 0.215 (DCC) 
• R-Value Work: 
  0.177 (Depositor), 0.178 (DCC) 
• R-Value Observed: 
  0.179 (Depositor) 

Starting Model: experimental

Literature

ASPP proteins discriminate between PP1 catalytic subunits through their SH3 domain and the PP1 C-tail.

Bertran, M.T., Mouilleron, S., Zhou, Y., Bajaj, R., Uliana, F., Kumar, G.S., van Drogen, A., Lee, R., Banerjee, J.J., Hauri, S., O'Reilly, N., Gstaiger, M., Page, R., Peti, W., Tapon, N.

(2019) Nat Commun 10: 771-771

• PubMed: 30770806 
• DOI: https://doi.org/10.1038/s41467-019-08686-0
• Primary Citation Related Structures: 
  6GHM


• PubMed Abstract: 
  

  Serine/threonine phosphatases such as PP1 lack substrate specificity and associate with a large array of targeting subunits to achieve the requisite selectivity. The tumour suppressor ASPP (apoptosis-stimulating protein of p53) proteins associate with PP1 catalytic subunits and are implicated in multiple functions from transcriptional regulation to cell junction remodelling. Here we show that Drosophila ASPP is part of a multiprotein PP1 complex and that PP1 association is necessary for several in vivo functions of Drosophila ASPP. We solve the crystal structure of the human ASPP2/PP1 complex and show that ASPP2 recruits PP1 using both its canonical RVxF motif, which binds the PP1 catalytic domain, and its SH3 domain, which engages the PP1 C-terminal tail. The ASPP2 SH3 domain can discriminate between PP1 isoforms using an acidic specificity pocket in the n-Src domain, providing an exquisite mechanism where multiple motifs are used combinatorially to tune binding affinity to PP1.

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Organizational Affiliation: 
• Apoptosis and Proliferation Control Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
Structural Biology - Science Technology Platform, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK. [e-mail].
Chemistry and Biochemistry Department, University of Arizona, 1041 E. Lowell Street, Biosciences West, 517, Tucson, AZ, 85721, USA.
Department of Biology, Institute of Molecular Systems Biology, ETH Zürich, 8093, Zürich, Switzerland.
Structural Biology - Science Technology Platform, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
Peptide Chemistry Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
Apoptosis and Proliferation Control Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK. [e-mail].

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 125.59 kDa 
• Atom Count: 8,259 
• Modeled Residue Count: 996 
• Deposited Residue Count: 1,086 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein phosphatase PP1-alpha catalytic subunit	A, B	329	Homo sapiens	Mutation(s): 0  Gene Names: PPP1CA, PPP1A EC: 3.1.3.16
UniProt & NIH Common Fund Data Resources
Find proteins for P62136 (Homo sapiens) Explore P62136  Go to UniProtKB:  P62136
PHAROS:  P62136 GTEx:  ENSG00000172531

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Apoptosis-stimulating of p53 protein 2	C, D	214	Homo sapiens	Mutation(s): 0  Gene Names: TP53BP2, ASPP2, BBP
UniProt & NIH Common Fund Data Resources
Find proteins for Q13625 (Homo sapiens) Explore Q13625  Go to UniProtKB:  Q13625
PHAROS:  Q13625 GTEx:  ENSG00000143514

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NHE	DA [auth D], N [auth A], O [auth A], W [auth B], X [auth B], Y [auth B]	2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID C8 H17 N O3 S MKWKNSIESPFAQN-UHFFFAOYSA-N
GOL	K [auth A], L [auth A], M [auth A], V [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
EDO	BA [auth D], CA [auth D], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], R [auth B], S [auth B], T [auth B], U [auth B]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
MN	AA [auth B], P [auth A], Q [auth A], Z [auth B]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free:  0.214 (Depositor), 0.215 (DCC) 
• R-Value Work:  0.177 (Depositor), 0.178 (DCC) 
• R-Value Observed: 0.179 (Depositor) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.84	α = 91.06
b = 81.624	β = 91.84
c = 87.966	γ = 103.89

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-02-27 
Deposition Author(s): Mouilleron, S., Bertran, T.M., Tapon, N., Zhou, Y.

Revision History  

• Version 1.0: 2019-02-27
  Type: Initial release
  
• Version 1.1: 2024-01-17
  Changes: Data collection, Database references, Derived calculations, Refinement description