1UMW

Structure of a human Plk1 Polo-box domain/phosphopeptide complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.229 

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This is version 1.1 of the entry. See complete history. 


Literature

The Molecular Basis for Phosphodependent Substrate Targeting and Regulation of Plks by the Polo-Box Domain

Elia, A., Rellos, P., Haire, L., Chao, J., Ivins, F., Hoepker, K., Mohammad, D., Cantley, L., Smerdon, S.J., Yaffe, M.B.

(2003) Cell 115: 83

  • DOI: 10.1016/s0092-8674(03)00725-6
  • Primary Citation of Related Structures:  
    1UMW

  • PubMed Abstract: 

    • Polo-like kinases (Plks) perform crucial functions in cell-cycle progression and multiple stages of mitosis. Plks are characterized by a C-terminal noncatalytic region containing two tandem Polo boxes, termed the Polo-box domain (PBD), which has recently been implicated in phosphodependent substrate targeting ...

    Polo-like kinases (Plks) perform crucial functions in cell-cycle progression and multiple stages of mitosis. Plks are characterized by a C-terminal noncatalytic region containing two tandem Polo boxes, termed the Polo-box domain (PBD), which has recently been implicated in phosphodependent substrate targeting. We show that the PBDs of human, Xenopus, and yeast Plks all recognize similar phosphoserine/threonine-containing motifs. The 1.9 A X-ray structure of a human Plk1 PBD-phosphopeptide complex shows that the Polo boxes each comprise beta6alpha structures that associate to form a 12-stranded beta sandwich domain. The phosphopeptide binds along a conserved, positively charged cleft located at the edge of the Polo-box interface. Mutations that specifically disrupt phosphodependent interactions abolish cell-cycle-dependent localization and provide compelling phenotypic evidence that PBD-phospholigand binding is necessary for proper mitotic progression. In addition, phosphopeptide binding to the PBD stimulates kinase activity in full-length Plk1, suggesting a conformational switching mechanism for Plk regulation and a dual functionality for the PBD.

    Organizational Affiliation: 

    Center for Cancer Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE PLKA, B237Homo sapiensMutation(s): 0 
Gene Names: PLK1, PLK
EC: 2.7.1 (PDB Primary Data), 2.7.11.21 (UniProt)
Find proteins for P53350 (Homo sapiens)
Explore P53350 
Go to UniProtKB:  P53350
NIH Common Fund Data Resources
PHAROS:  P53350
GTEx:  ENSG00000166851
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDEC [auth E], D [auth F]7synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO		C [auth E], D [auth F]L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.229 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.352α = 90
b = 79.518β = 93.26
c = 61.993γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-16
    Type: Initial release
  • Version 1.1: 2017-02-08
    Changes: Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance