3RQ7

Polo-like kinase 1 Polo box domain in complex with a C6H5(CH2)8-derivatized peptide inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.152 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Serendipitous alkylation of a Plk1 ligand uncovers a new binding channel.

Liu, F.Park, J.E.Qian, W.J.Lim, D.Graber, M.Berg, T.Yaffe, M.B.Lee, K.S.Burke, T.R.

(2011) Nat.Chem.Biol. 7: 595-601

  • DOI: 10.1038/nchembio.614

  • PubMed Abstract: 
  • We obtained unanticipated synthetic byproducts from alkylation of the δ(1) nitrogen (N3) of the histidine imidazole ring of the polo-like kinase-1 (Plk1) polo-box domain (PBD)-binding peptide PLHSpT. For the highest-affinity byproduct, bearing a C(6) ...

    We obtained unanticipated synthetic byproducts from alkylation of the δ(1) nitrogen (N3) of the histidine imidazole ring of the polo-like kinase-1 (Plk1) polo-box domain (PBD)-binding peptide PLHSpT. For the highest-affinity byproduct, bearing a C(6)H(5)(CH(2))(8)- group, a Plk1 PBD cocrystal structure revealed a new binding channel that had previously been occluded. An N-terminal PEGylated version of this peptide containing a hydrolytically stable phosphothreonyl residue (pT) bound the Plk1 PBD with affinity equal to that of the non-PEGylated parent but showed markedly less interaction with the PBDs of the two closely related proteins Plk2 and Plk3. Treatment of cultured cells with this PEGylated peptide resulted in delocalization of Plk1 from centrosomes and kinetochores and in chromosome misalignment that effectively induced mitotic block and apoptotic cell death. This work provides insights that might advance efforts to develop Plk1 PBD-binding inhibitors as potential Plk1-specific anticancer agents.


    Organizational Affiliation

    Chemical Biology Laboratory, Molecular Discovery Program, Center for Cancer Research, National Cancer Institute-Frederick, Frederick, Maryland, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase PLK1
A
237Homo sapiensMutation(s): 0 
Gene Names: PLK1 (PLK)
EC: 2.7.11.21
Find proteins for P53350 (Homo sapiens)
Go to Gene View: PLK1
Go to UniProtKB:  P53350
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
C6H5(CH2)8-derivatized peptide inhibitor
B
7N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000794
Query on PRD_000794
BC6H5(CH2)8-derivatized peptide inhibitorPolypeptide / Enzyme inhibitor

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.152 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 35.337α = 90.00
b = 51.210β = 101.00
c = 57.963γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-20
    Type: Initial release
  • Version 1.1: 2011-08-03
    Type: Database references
  • Version 1.2: 2011-08-31
    Type: Database references
  • Version 1.3: 2012-10-10
    Type: Structure summary
  • Version 1.4: 2012-12-12
    Type: Other