8S31

Crystal structure of human PLK1 Polo-Box Domain in complex with Mis18BP1

• PDB DOI: https://doi.org/10.2210/pdb8S31/pdb

• Classification: CELL CYCLE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-02-19 Released: 2024-08-21 
• Deposition Author(s): Jeyaprakash, A.A., Medina-Pritchard, B.
• Funding Organization(s): Medical Research Council (MRC, United Kingdom)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.13 Å
• R-Value Free: 0.224 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 

Starting Model: experimental

Literature

PLK1-mediated phosphorylation cascade activates Mis18 complex to ensure centromere inheritance

Jeyaprakash, A.A., Medina-Pritchard, B.

(2024) Science 

• DOI: https://doi.org/10.1126/science.ado8270

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 58.54 kDa 
• Atom Count: 4,013 
• Modelled Residue Count: 471 
• Deposited Residue Count: 506 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase PLK1	A, B	242	Homo sapiens	Mutation(s): 0  Gene Names: PLK1, PLK EC: 2.7.11.21
UniProt & NIH Common Fund Data Resources
Find proteins for P53350 (Homo sapiens) Explore P53350  Go to UniProtKB:  P53350
PHAROS:  P53350 GTEx:  ENSG00000166851

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Mis18-binding protein 1	C, D	11	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q6P0N0 (Homo sapiens) Explore Q6P0N0  Go to UniProtKB:  Q6P0N0
PHAROS:  Q6P0N0 GTEx:  ENSG00000129534

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TPO	C, D	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.13 Å
• R-Value Free: 0.224 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.147	α = 90
b = 67.147	β = 90
c = 254.536	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
xia2	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-08-21 
Deposition Author(s): Jeyaprakash, A.A., Medina-Pritchard, B.

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Funding Organization	Location	Grant Number
Medical Research Council (MRC, United Kingdom)	United Kingdom	MR/X001245/1

Revision History  

• Version 1.0: 2024-08-21
  Type: Initial release