2OJX

Molecular and structural basis of polo-like kinase 1 substrate recognition: Implications in centrosomal localization


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 

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This is version 1.2 of the entry. See complete history


Literature

Molecular and structural basis of polo-like kinase 1 substrate recognition: Implications in centrosomal localization.

Garcia-Alvarez, B.de Carcer, G.Ibanez, S.Bragado-Nilsson, E.Montoya, G.

(2007) Proc Natl Acad Sci U S A 104: 3107-3112

  • DOI: 10.1073/pnas.0609131104
  • Primary Citation of Related Structures:  
    3BZI, 2OGQ, 2OJX

  • PubMed Abstract: 
  • Polo-like kinase (Plk1) is crucial for cell cycle progression through mitosis. Here we present the molecular and structural mechanisms that regulate the substrate recognition of Plk1 and influence its centrosomal localization and activity. Our work shows that Plk1 localization is controlled not only by the polo box domain (PBD); remarkably, the kinase domain is also involved in Plk1 targeting mechanism to the centrosome ...

    Polo-like kinase (Plk1) is crucial for cell cycle progression through mitosis. Here we present the molecular and structural mechanisms that regulate the substrate recognition of Plk1 and influence its centrosomal localization and activity. Our work shows that Plk1 localization is controlled not only by the polo box domain (PBD); remarkably, the kinase domain is also involved in Plk1 targeting mechanism to the centrosome. The crystal structures of the PBD in complex with Cdc25C and Cdc25C-P target peptides reveal that Trp-414 is fundamental in their recognition regardless of its phosphorylation status. Binding measurements demonstrate that W414F mutation abolishes molecular recognition and diminishes centrosomal localization. Therefore, Plk1 centrosomal localization is not controlled by His-538 and Lys-540, the residues involved in phosphorylated target binding. The different conformations of the loop, which connects the polo boxes in the apo and the PBD-Cdc25C and PBD-Cdc25C-P complex structures, together with changes in the proline adjacent to the phosphothreonine in the target peptide, suggest a regulatory mechanism to detect binding of unphosphorylated or phosphorylated target substrates. Altogether, these data propose a model for the interaction between Plk1 and Cdc25C.


    Organizational Affiliation

    Structural Biology and Biocomputing Programme, Macromolecular Crystallography Group, Molecular Oncology Programme, Cell Division and Cancer Group, Spanish National Cancer Center (CNIO), 28029 Madrid, Spain.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase PLK1A239Homo sapiensMutation(s): 0 
Gene Names: PLK1PLK
EC: 2.7.11.21
Find proteins for P53350 (Homo sapiens)
Explore P53350 
Go to UniProtKB:  P53350
NIH Common Fund Data Resources
PHAROS:  P53350
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Synthetic peptideB [auth E]9N/AMutation(s): 0 
Find proteins for P30307 (Homo sapiens)
Explore P30307 
Go to UniProtKB:  P30307
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PHAROS:  P30307
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.186α = 90
b = 49.178β = 109.48
c = 56.234γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-02-13
    Type: Initial release
  • Version 1.1: 2007-10-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance