5WWL | pdb_00005wwl

Crystal structure of the Schizogenesis pombe kinetochore Mis12C subcomplex

• PDB DOI: https://doi.org/10.2210/pdb5WWL/pdb

• Classification: CELL CYCLE
• Organism(s): Schizosaccharomyces pombe 972h-
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2017-01-02 Released: 2017-11-15 
• Deposition Author(s): Wang, C., Zhou, X., Wu, M., Zhang, X., Zang, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 
  0.272 (Depositor), 0.288 (DCC) 
• R-Value Work: 
  0.234 (Depositor) 
• R-Value Observed: 
  0.236 (Depositor) 

Literature

Phosphorylation of CENP-C by Aurora B facilitates kinetochore attachment error correction in mitosis.

Zhou, X., Zheng, F., Wang, C., Wu, M., Zhang, X., Wang, Q., Yao, X., Fu, C., Zhang, X., Zang, J.

(2017) Proc Natl Acad Sci U S A 114: E10667-E10676

• PubMed: 29180432 
• DOI: https://doi.org/10.1073/pnas.1710506114
• Primary Citation Related Structures: 
  5WWL


• PubMed Abstract: 
  

  Kinetochores are superprotein complexes that orchestrate chromosome segregation via a dynamic interaction with spindle microtubules. A physical connection between CENP-C and the Mis12-Ndc80-Knl1 (KMN) protein network is an important pathway that is used to assemble kinetochores on CENP-A nucleosomes. Multiple outer kinetochore components are phosphorylated by Aurora B kinase to activate the spindle assembly checkpoint (SAC) and to ensure accurate chromosome segregation. However, it is unknown whether Aurora B can phosphorylate inner kinetochore components to facilitate proper mitotic chromosome segregation. Here, we reported the structure of the fission yeast Schizosaccharomyces pombe Mis12-Nnf1 complex and showed that N-terminal residues 26-50 in Cnp3 (the CENP-C homolog of S. pombe ) are responsible for interacting with the Mis12 complex. Interestingly, Thr28 of Cnp3 is a substrate of Ark1 (the Aurora B homolog of S. pombe ), and phosphorylation impairs the interaction between the Cnp3 and Mis12 complex. The expression of a phosphorylation-mimicking Cnp3 mutant results in defective chromosome segregation due to improper kinetochore assembly. These results establish a previously uncharacterized regulatory mechanism involved in CENP-C-Mis12-facilitated kinetochore attachment error correction to ensure accurate chromosome segregation during mitosis.

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Organizational Affiliation: 
• Hefei National Laboratory for Physical Sciences at Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China.
CAS Center for Excellence in Biomacromolecules, University of Science and Technology of China, Hefei, Anhui 230026, China.
Collaborative Innovation Center of Chemistry for Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China.
Key Laboratory of Structural Biology, Chinese Academy of Sciences, Hefei, Anhui 230027, People's Republic of China.
National Center for Protein Science Shanghai, Shanghai 201210, People's Republic of China.
Hefei National Laboratory for Physical Sciences at Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; [e-mail] [e-mail].

Biological Assembly 1  

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: 45.54 kDa 
• Atom Count: 3,031 
• Modeled Residue Count: 369 
• Deposited Residue Count: 390 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Centromere protein mis12	A [auth M]	215	Schizosaccharomyces pombe 972h-	Mutation(s): 0  Gene Names: mis12, SPBC409.04c
UniProt
Find proteins for Q9Y738 (Schizosaccharomyces pombe (strain 972 / ATCC 24843)) Explore Q9Y738  Go to UniProtKB:  Q9Y738

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Kinetochore protein nnf1	B [auth N]	175	Schizosaccharomyces pombe 972h-	Mutation(s): 0  Gene Names: nnf1, SPAC29E6.04, SPAC30.08
UniProt
Find proteins for Q09858 (Schizosaccharomyces pombe (strain 972 / ATCC 24843)) Explore Q09858  Go to UniProtKB:  Q09858

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free:  0.272 (Depositor), 0.288 (DCC) 
• R-Value Work:  0.234 (Depositor) 
• R-Value Observed: 0.236 (Depositor) 

Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.5	α = 90
b = 85.61	β = 90
c = 123.79	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
AutoSol	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2017-11-15 
Deposition Author(s): Wang, C., Zhou, X., Wu, M., Zhang, X., Zang, J.

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Funding Organization	Location	Grant Number
	China	--

Revision History  

• Version 1.0: 2017-11-15
  Type: Initial release
  
• Version 1.1: 2017-12-20
  Changes: Database references
• Version 1.2: 2017-12-27
  Changes: Database references
• Version 1.3: 2024-03-20
  Changes: Data collection, Database references