4G7N

The Structure of the Plk4 Cryptic Polo Box Reveals Two Tandem Polo Boxes Required for Centriole Duplication


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structure of the plk4 cryptic polo box reveals two tandem polo boxes required for centriole duplication.

Slevin, L.K.Nye, J.Pinkerton, D.C.Buster, D.W.Rogers, G.C.Slep, K.C.

(2012) Structure 20: 1905-1917

  • DOI: 10.1016/j.str.2012.08.025

  • PubMed Abstract: 
  • Centrioles are key microtubule polarity determinants. Centriole duplication is tightly controlled to prevent cells from developing multipolar spindles, a situation that promotes chromosomal instability. A conserved component in the duplication pathwa ...

    Centrioles are key microtubule polarity determinants. Centriole duplication is tightly controlled to prevent cells from developing multipolar spindles, a situation that promotes chromosomal instability. A conserved component in the duplication pathway is Plk4, a polo kinase family member that localizes to centrioles in M/G1. To limit centriole duplication, Plk4 levels are controlled through trans-autophosphorylation that primes ubiquitination. In contrast to Plks 1-3, Plk4 possesses a unique central region called the "cryptic polo box." Here, we present the crystal structure of this region at 2.3 Å resolution. Surprisingly, the structure reveals two tandem homodimerized polo boxes, PB1-PB2, that form a unique winged architecture. The full PB1-PB2 cassette is required for binding the centriolar protein Asterless as well as robust centriole targeting. Thus, with its C-terminal polo box (PB3), Plk4 has a triple polo box architecture that facilitates oligomerization, targeting, and promotes trans-autophosphorylation, limiting centriole duplication to once per cell cycle.


    Organizational Affiliation

    Department of Biology, CB 3280, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase PLK4
A, B
225Drosophila melanogasterGene Names: SAK
EC: 2.7.11.21
Find proteins for O97143 (Drosophila melanogaster)
Go to UniProtKB:  O97143
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 86.773α = 90.00
b = 135.580β = 90.00
c = 46.670γ = 90.00
Software Package:
Software NamePurpose
SERGUIdata collection
HKL-2000data reduction
HKL-2000data scaling
PHENIXmodel building
PHENIXrefinement
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-10
    Type: Initial release
  • Version 1.1: 2012-12-12
    Type: Database references