Biological Assembly 1  

 3D View: Structure | Electron Density

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Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19323.86 
• Atom Count: 1166 
• Residue Count: 176 
• Unique protein chains: 1

1MBY

Murine Sak Polo Domain

• DOI: 10.2210/pdb1MBY/pdb

• Classification: TRANSFERASE
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): 2 


• Deposited: 2002-08-04 Released: 2002-10-30 
• Deposition Author(s): Leung, G.C., Hudson, J.W., Kozarova, A., Davidson, A., Dennis, J.W., Sicheri, F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.249 
• R-Value Work: 0.231 

Literature

The Sak polo-box comprises a structural domain sufficient for mitotic subcellular localization.

Leung, G.C., Hudson, J.W., Kozarova, A., Davidson, A., Dennis, J.W., Sicheri, F.

(2002) Nat.Struct.Mol.Biol. 9: 719-724

• PubMed: 12352953 
• DOI: 10.1038/nsb848


• PubMed Abstract: 
  

The small family of polo-like kinases (Plks) includes Cdc5 from Saccharomyces cerevisiae, Plo1 from Schizosaccharomyces pombe, Polo from Drosophila melanogaster and the four mammalian genes Plk1, Prk/Fnk, Snk and Sak. These kinases control cell cycle progression through the regulation of centrosome maturation and separation, mitotic entry, metaphase to anaphase transition, mitotic exit and cytokinesis. Plks are characterized by an N-terminal Ser/Thr protein kinase domain and the presence of one or two C-terminal regions of similarity, termed the polo box motifs. These motifs have been demonstrated for Cdc5 and Plk1 to be required for mitotic progression and for subcellular localization to mitotic structures. Here we report the 2.0 A crystal structure of a novel domain composed of the polo box motif of murine Sak. The structure consists of a dimeric fold with a deep interfacial cleft and pocket, suggestive of a ligand-binding site. We show that this domain forms homodimers both in vitro and in vivo, and localizes to centrosomes and the cleavage furrow during cytokinesis. The requirement of the polo domain for Plk family function and the unique physical properties of the domain identify it as an attractive target for inhibitor design.

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Organizational Affiliation: 

Program in Molecular Biology and Cancer, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
serine/threonine kinase	A, B	88	Mus musculus	Mutation(s): 2  Gene Names: Plk4 (Sak, Stk18) EC: 2.7.11.21
Find proteins for Q64702 (Mus musculus) Go to UniProtKB:  Q64702

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.249 
• R-Value Work: 0.231 
• Space Group: P 3₂ 1 2

Unit Cell:

Length (Å)	Angle (°)
a = 51.782	α = 90.00
b = 51.782	β = 90.00
c = 146.941	γ = 120.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-08-04 
• Released Date: 2002-10-30 
• Deposition Author(s): Leung, G.C., Hudson, J.W., Kozarova, A., Davidson, A., Dennis, J.W., Sicheri, F.

Revision History 

• Version 1.0: 2002-10-30
  Type: Initial release
• Version 1.1: 2008-04-28
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance