Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 40.82 kDa 
• Atom Count: 3128 
• Residue Count: 326 
• Unique protein chains: 2

5INB

RepoMan-PP1g (protein phosphatase 1, gamma isoform) holoenzyme complex

• DOI: 10.2210/pdb5INB/pdb

• Classification: HYDROLASE/PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3), Escherichia coli
• Mutation(s): No 


• Deposited: 2016-03-07 Released: 2016-10-05 
• Deposition Author(s): Kumar, G.S., Peti, W., Page, R.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.153 
• R-Value Work: 0.132 
• R-Value Observed: 0.133 

Literature

The Ki-67 and RepoMan mitotic phosphatases assemble via an identical, yet novel mechanism.

Kumar, G.S., Gokhan, E., De Munter, S., Bollen, M., Vagnarelli, P., Peti, W., Page, R.

(2016) Elife 5

• PubMed: 27572260 
• DOI: 10.7554/eLife.16539
• Primary Citation of Related Structures:  
  5INB, 5IOH, 5J28


• PubMed Abstract: 
  

Ki-67 and RepoMan have key roles during mitotic exit. Previously, we showed that Ki-67 organizes the mitotic chromosome periphery and recruits protein phosphatase 1 (PP1) to chromatin at anaphase onset, in a similar manner as RepoMan (Booth et al., 2014). Here we show how Ki-67 and RepoMan form mitotic exit phosphatases by recruiting PP1, how they distinguish between distinct PP1 isoforms and how the assembly of these two holoenzymes are dynamically regulated by Aurora B kinase during mitosis. Unexpectedly, our data also reveal that Ki-67 and RepoMan bind PP1 using an identical, yet novel mechanism, interacting with a PP1 pocket that is engaged only by these two PP1 regulators. These findings not only show how two distinct mitotic exit phosphatases are recruited to their substrates, but also provide immediate opportunities for the design of novel cancer therapeutics that selectively target the Ki-67:PP1 and RepoMan:PP1 holoenzymes.

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Organizational Affiliation: 

Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, United States.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein phosphatase PP1-gamma catalytic subunit	A	305	Homo sapiens	Mutation(s): 0  Gene Names: PPP1CC EC: 3.1.3.16
Find proteins for P36873 (Homo sapiens) Explore P36873  Go to UniProtKB:  P36873
NIH Common Fund Data Resources
PHAROS:  P36873 GTEx:  ENSG00000186298

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cell division cycle-associated protein 2	B	46	Homo sapiens	Mutation(s): 0  Gene Names: CDCA2
Find proteins for Q69YH5 (Homo sapiens) Explore Q69YH5  Go to UniProtKB:  Q69YH5
NIH Common Fund Data Resources
PHAROS:  Q69YH5 GTEx:  ENSG00000184661

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MLI	A	MALONATE ION C3 H2 O4 OFOBLEOULBTSOW-UHFFFAOYSA-L
GOL	A	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
NA	A	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.153 
• R-Value Work: 0.132 
• R-Value Observed: 0.133 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.371	α = 90
b = 86.371	β = 90
c = 215.894	γ = 120

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2016-03-07 
• Released Date: 2016-10-05 
Deposition Author(s): Kumar, G.S., Peti, W., Page, R.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R01GM098482
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	1R01NS091336

Revision History 

• Version 1.0: 2016-10-05
  Type: Initial release
  
• Version 1.1: 2016-10-12
  Changes: Database references
• Version 1.2: 2017-09-27
  Changes: Author supporting evidence, Derived calculations
• Version 1.3: 2019-12-18
  Changes: Author supporting evidence