Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 13.45 kDa 
• Atom Count: 967 
• Residue Count: 119 
• Unique protein chains: 2

4YYP

Crystal structure of human PLK4-PB3 in complex with STIL-CC

• DOI: 10.2210/pdb4YYP/pdb
• BMRB: 26547

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2015-03-24 Released: 2015-07-29 
• Deposition Author(s): Imseng, S., Arquint, C., Gabryjonczyk, A., Boehm, R., Sauer, E., Hiller, S., Nigg, E.A., Maier, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.254 
• R-Value Work: 0.217 
• R-Value Observed: 0.221 

Literature

STIL binding to Polo-box 3 of PLK4 regulates centriole duplication.

Arquint, C., Gabryjonczyk, A.M., Imseng, S., Bohm, R., Sauer, E., Hiller, S., Nigg, E.A., Maier, T.

(2015) Elife 4

• PubMed: 26188084 
• DOI: 10.7554/eLife.07888
• Primary Citation of Related Structures:  
  4YYP, 2N19


• PubMed Abstract: 
  

Polo-like kinases (PLK) are eukaryotic regulators of cell cycle progression, mitosis and cytokinesis; PLK4 is a master regulator of centriole duplication. Here, we demonstrate that the SCL/TAL1 interrupting locus (STIL) protein interacts via its coiled-coil region (STIL-CC) with PLK4 in vivo. STIL-CC is the first identified interaction partner of Polo-box 3 (PB3) of PLK4 and also uses a secondary interaction site in the PLK4 L1 region. Structure determination of free PLK4-PB3 and its STIL-CC complex via NMR and crystallography reveals a novel mode of Polo-box-peptide interaction mimicking coiled-coil formation. In vivo analysis of structure-guided STIL mutants reveals distinct binding modes to PLK4-PB3 and L1, as well as interplay of STIL oligomerization with PLK4 binding. We suggest that the STIL-CC/PLK4 interaction mediates PLK4 activation as well as stabilization of centriolar PLK4 and plays a key role in centriole duplication.

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Organizational Affiliation: 

Biozentrum, University of Basel, Basel, Switzerland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase PLK4	A	87	Homo sapiens	Mutation(s): 0  Gene Names: PLK4, SAK, STK18 EC: 2.7.11.21
Find proteins for O00444 (Homo sapiens) Explore O00444  Go to UniProtKB:  O00444
NIH Common Fund Data Resources
PHAROS:  O00444 GTEx:  ENSG00000142731

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
SCL-interrupting locus protein	B	32	Homo sapiens	Mutation(s): 0  Gene Names: STIL, SIL
Find proteins for Q15468 (Homo sapiens) Explore Q15468  Go to UniProtKB:  Q15468
NIH Common Fund Data Resources
PHAROS:  Q15468 GTEx:  ENSG00000123473

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.254 
• R-Value Work: 0.217 
• R-Value Observed: 0.221 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.57	α = 90
b = 136.33	β = 90
c = 33.44	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
PHASER	phasing
Coot	model building
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-03-24 
• Released Date: 2015-07-29 
Deposition Author(s): Imseng, S., Arquint, C., Gabryjonczyk, A., Boehm, R., Sauer, E., Hiller, S., Nigg, E.A., Maier, T.

Revision History 

• Version 1.0: 2015-07-29
  Type: Initial release