5DMV

Polo-box domain of Mouse Polo-like kinase 1 complexed with Emi2 (146-177)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.216 

wwPDB Validation 3D Report Full Report



Literature

Structural basis for recognition of Emi2 by Polo-like kinase 1 and development of peptidomimetics blocking oocyte maturation and fertilization.

Jia, J.L.Han, Y.H.Kim, H.C.Ahn, M.Kwon, J.W.Luo, Y.Gunasekaran, P.Lee, S.J.Lee, K.S.Bang, J.K.Kim, N.H.Namgoong, S.

(2015) Sci Rep 5: 14626-14626

  • DOI: 10.1038/srep14626
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • In a mammalian oocyte, completion of meiosis is suspended until fertilization by a sperm, and the cell cycle is arrested by a biochemical activity called cytostatic factor (CSF). Emi2 is one of the CSFs, and it maintains the protein level of maturati ...

    In a mammalian oocyte, completion of meiosis is suspended until fertilization by a sperm, and the cell cycle is arrested by a biochemical activity called cytostatic factor (CSF). Emi2 is one of the CSFs, and it maintains the protein level of maturation promoting factor (MPF) by inhibiting ubiquitin ligase anaphase promoting complex/cyclosome (APC/C). Degradation of Emi2 via ubiquitin-mediated proteolysis after fertilization requires phosphorylation by Polo-like kinase 1 (Plk1). Therefore, recognition and phosphorylation of Emi2 by Plk1 are crucial steps for cell cycle resumption, but the binding mode of Emi2 and Plk1 is poorly understood. Using biochemical assays and X-ray crystallography, we found that two phosphorylated threonines (Thr(152) and Thr(176)) in Emi2 are each responsible for the recruitment of one Plk1 molecule by binding to its C-terminal polo box domain (PBD). We also found that meiotic maturation and meiosis resumption via parthenogenetic activation were impaired when Emi2 interaction with Plk1-PBD was blocked by a peptidomimetic called 103-8. Because of the inherent promiscuity of kinase inhibitors, our results suggest that targeting PBD of Plk1 may be an effective strategy for the development of novel and specific contraceptive agents that block oocyte maturation and/or fertilization.


    Organizational Affiliation

    Department of Animal Sciences, Chungbuk National University, Republic of Korea.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase PLK1
C
237Mus musculusMutation(s): 0 
Gene Names: Plk1Plk
EC: 2.7.11.21
Find proteins for Q07832 (Mus musculus)
Go to UniProtKB:  Q07832
NIH Common Fund Data Resources
IMPC  MGI:97621
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
F-box only protein 43
D
32Mus musculusMutation(s): 0 
Gene Names: Fbxo43Emi2
Find proteins for Q8CDI2 (Mus musculus)
Go to UniProtKB:  Q8CDI2
NIH Common Fund Data Resources
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NI
Query on NI

Download CCD File 
C
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
DL-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.627α = 90
b = 63.329β = 97.2
c = 56.831γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2015-09-09 
  • Released Date: 2015-10-28 
  • Deposition Author(s): Namgoong, S.

Revision History 

  • Version 1.0: 2015-10-28
    Type: Initial release