Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 26.21 kDa 
• Atom Count: 1845 
• Modelled Residue Count: 222 
• Deposited Residue Count: 226 
• Unique protein chains: 2

3C5L

Polo-like kinase 1 Polo box domain in complex with PPHSpT peptide

• PDB DOI: 10.2210/pdb3C5L/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-01-31 Released: 2009-02-17 
• Deposition Author(s): Lim, D.C., Yaffe, M.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.33 Å
• R-Value Free: 0.293 
• R-Value Work: 0.246 
• R-Value Observed: 0.246 

Literature

Structural and functional analyses of minimal phosphopeptides targeting the polo-box domain of polo-like kinase 1.

Yun, S.M., Moulaei, T., Lim, D., Bang, J.K., Park, J.E., Shenoy, S.R., Liu, F., Kang, Y.H., Liao, C., Soung, N.K., Lee, S., Yoon, D.Y., Lim, Y., Lee, D.H., Otaka, A., Appella, E., McMahon, J.B., Nicklaus, M.C., Burke, T.R., Yaffe, M.B., Wlodawer, A., Lee, K.S.

(2009) Nat Struct Mol Biol 16: 876-882

• PubMed: 19597481 
• DOI: 10.1038/nsmb.1628
• Primary Citation of Related Structures:  
  3C5L, 3FVH, 3HIH, 3HIK


• PubMed Abstract: 
  

Polo-like kinase-1 (Plk1) has a pivotal role in cell proliferation and is considered a potential target for anticancer therapy. The noncatalytic polo-box domain (PBD) of Plk1 forms a phosphoepitope binding module for protein-protein interaction. Here, we report the identification of minimal phosphopeptides that specifically interact with the PBD of human PLK1, but not those of the closely related PLK2 and PLK3. Comparative binding studies and analyses of crystal structures of the PLK1 PBD in complex with the minimal phosphopeptides revealed that the C-terminal SpT dipeptide functions as a high-affinity anchor, whereas the N-terminal residues are crucial for providing specificity and affinity to the interaction. Inhibition of the PLK1 PBD by phosphothreonine mimetic peptides was sufficient to induce mitotic arrest and apoptotic cell death. The mode of interaction between the minimal peptide and PBD may provide a template for designing therapeutic agents that target PLK1.

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Organizational Affiliation: 

Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase PLK1	A	221	Homo sapiens	Mutation(s): 0  Gene Names: PLK1, PLK EC: 2.7.11.21
UniProt & NIH Common Fund Data Resources
Find proteins for P53350 (Homo sapiens) Explore P53350  Go to UniProtKB:  P53350
PHAROS:  P53350 GTEx:  ENSG00000166851

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Peptide	B	5	N/A	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TPO	B	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.33 Å
• R-Value Free: 0.293 
• R-Value Work: 0.246 
• R-Value Observed: 0.246 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 35.442	α = 90
b = 66.495	β = 90
c = 105.817	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data collection
HKL-2000	data reduction
SCALEPACK	data scaling
EPMR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-01-31 
• Released Date: 2009-02-17 
Deposition Author(s): Lim, D.C., Yaffe, M.B.

Revision History  

• Version 1.0: 2009-02-17
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance