3N5U

Crystal structure of an Rb C-terminal peptide bound to the catalytic subunit of PP1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

An overlapping kinase and phosphatase docking site regulates activity of the retinoblastoma protein.

Hirschi, A.Cecchini, M.Steinhardt, R.C.Schamber, M.R.Dick, F.A.Rubin, S.M.

(2010) Nat Struct Mol Biol 17: 1051-1057

  • DOI: 10.1038/nsmb.1868
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The phosphorylation state and corresponding activity of the retinoblastoma tumor suppressor protein (Rb) are modulated by a balance of kinase and phosphatase activities. Here we characterize the association of Rb with the catalytic subunit of protein ...

    The phosphorylation state and corresponding activity of the retinoblastoma tumor suppressor protein (Rb) are modulated by a balance of kinase and phosphatase activities. Here we characterize the association of Rb with the catalytic subunit of protein phosphatase 1 (PP1c). A crystal structure identifies an enzyme docking site in the Rb C-terminal domain that is required for efficient PP1c activity toward Rb. The phosphatase docking site overlaps with the known docking site for cyclin-dependent kinase (Cdk), and PP1 competition with Cdk-cyclins for Rb binding is sufficient to retain Rb activity and block cell-cycle advancement. These results provide the first detailed molecular insights into Rb activation and establish a novel mechanism for Rb regulation in which kinase and phosphatase compete for substrate docking.


    Organizational Affiliation

    Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase PP1-alpha catalytic subunit
A, B
300Homo sapiensMutation(s): 0 
Gene Names: PPP1APPP1CA
EC: 3.1.3.16
Find proteins for P62136 (Homo sapiens)
Go to UniProtKB:  P62136
NIH Common Fund Data Resources
PHAROS  P62136
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Retinoblastoma-associated protein
C
13Homo sapiensMutation(s): 0 
Gene Names: RB1
Find proteins for P06400 (Homo sapiens)
Go to UniProtKB:  P06400
NIH Common Fund Data Resources
PHAROS  P06400
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download CCD File 
A, B
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.225 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.946α = 90
b = 92.946β = 90
c = 192.381γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-08-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance