3E7B

Crystal Structure of Protein Phosphatase-1 Bound to the natural toxin inhibitor Tautomycin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.154 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Crystal structures of protein phosphatase-1 bound to nodularin-R and tautomycin: a novel scaffold for structure-based drug design of serine/threonine phosphatase inhibitors

Kelker, M.S.Page, R.Peti, W.

(2009) J Mol Biol 385: 11-21

  • DOI: https://doi.org/10.1016/j.jmb.2008.10.053
  • Primary Citation of Related Structures:  
    3E7A, 3E7B

  • PubMed Abstract: 

    Protein phosphatase 1 occurs in all tissues and regulates many pathways, ranging from cell-cycle progression to carbohydrate metabolism. Many naturally occurring, molecular toxins modulate PP1 activity, though the exact mechanism of this differential regulation is not understood. A detailed elucidation of these interactions is crucial for understanding the cellular basis of phosphatase function and signaling pathways but, more importantly, they can serve as the basis for highly specific therapeutics, e.g. against cancer. We report the crystal structures of PP1 in complex with nodularin-R at 1.63 A and tautomycin at 1.70 A resolution. The PP1:nodularin-R complex was used to demonstrate the utility of our improved PP1 production technique, which produces highly active, soluble PP1. Tautomycin is one of the few toxins that reportedly preferentially binds PP1>PP2A. Therefore, the PP1:tautomycin structure is the first complex structure with a toxin with preferred PP1 specificity. Furthermore, since tautomycin is a linear non-peptide-based toxin, our reported structure will aid the design of lead compounds for novel PP1-specific pharmaceuticals.


  • Organizational Affiliation

    Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02903, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase PP1-alpha catalytic subunit
A, B
299Homo sapiensMutation(s): 0 
Gene Names: PPP1CAPPP1A
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 Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62136
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
E7B
Query on E7B

Download Ideal Coordinates CCD File 
E [auth A],
O [auth B]
(2Z)-2-[(1R)-3-{[(1R,2S,3R,6S,7S,10R)-10-{(2S,3S,6R,8S,9R)-3,9-dimethyl-8-[(3S)-3-methyl-4-oxopentyl]-1,7-dioxaspiro[5.5]undec-2-yl}-3,7-dihydroxy-2-methoxy-6-methyl-1-(1-methylethyl)-5-oxoundecyl]oxy}-1-hydroxy-3-oxopropyl]-3-methylbut-2-enedioic acid
C41 H68 O14
FLYBGKSOQRCWMB-SPVJCFRKSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
G [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
MN
Query on MN

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C [auth A],
D [auth A],
M [auth B],
N [auth B]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
AZI
Query on AZI

Download Ideal Coordinates CCD File 
I [auth A]
J [auth A]
K [auth A]
L [auth A]
P [auth B]
I [auth A],
J [auth A],
K [auth A],
L [auth A],
P [auth B],
Q [auth B]
AZIDE ION
N3
IVRMZWNICZWHMI-UHFFFAOYSA-N
CL
Query on CL

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F [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA
Query on NA

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H [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
E7B BindingDB:  3E7B Ki: 4.5 (nM) from 1 assay(s)
PDBBind:  3E7B IC50: 0.16 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.154 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.76α = 90
b = 78.519β = 90
c = 130.764γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description