Active Fe-PP1

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

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Effects of stably incorporated iron on protein phosphatase-1 structure and activity.

Salvi, F.Trebacz, M.Kokot, T.Hoermann, B.Rios, P.Barabas, O.Koehn, M.

(2018) FEBS Lett 592: 4028-4038

  • DOI: https://doi.org/10.1002/1873-3468.13284
  • Primary Citation of Related Structures:  
    6G0I, 6G0J

  • PubMed Abstract: 

    Protein phosphatase-1 (PP1) drives a large amount of phosphoSer/Thr protein dephosphorylations in eukaryotes to counteract multiple kinases in signaling pathways. The phosphatase requires divalent metal cations for catalytic activity and contains iron naturally. Iron has been suggested to have an influence on PP1 activity through Fe 2+ and Fe 3+ oxidation states. However, much biochemical and all structural data have been obtained with recombinant PP1 containing Mn 2+ ions. Purifying iron-containing PP1 from Escherichia coli has thus far not been possible. Here, we present the preparation, characterization, and structure of iron-bound PP1α in inactive and active states. We establish a key role for the electronic/redox properties of iron in PP1 activity and shed light on the difference in substrate specificity between iron- and manganese-containing PP1.

  • Organizational Affiliation

    Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase PP1-alpha catalytic subunit331Homo sapiensMutation(s): 0 
Gene Names: PPP1CAPPP1A
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
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.365α = 90
b = 68.686β = 90
c = 126.995γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number

Revision History  (Full details and data files)

  • Version 1.0: 2018-11-21
    Type: Initial release
  • Version 1.1: 2019-01-02
    Changes: Data collection, Database references
  • Version 1.2: 2019-01-09
    Changes: Data collection, Database references
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Derived calculations, Refinement description