Molecular and structural basis of Plk1 substrate recognition: Implications in centrosomal localization

Experimental Data Snapshot

  • Resolution: 1.95 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.162 

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

  • 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. 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein kinase PLK1239Homo sapiensMutation(s): 0 
Gene Names: PLK1PLK
UniProt & NIH Common Fund Data Resources
Find proteins for P53350 (Homo sapiens)
Explore P53350 
Go to UniProtKB:  P53350
PHAROS:  P53350
GTEx:  ENSG00000166851 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP53350
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.95 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.162 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.051α = 90
b = 99.017β = 90
c = 33.19γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data 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
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Refinement description