4JE3

An Iml3-Chl4 heterodimer links the core centromere to factors required for accurate chromosome segregation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.282 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

An iml3-chl4 heterodimer links the core centromere to factors required for accurate chromosome segregation.

Hinshaw, S.M.Harrison, S.C.

(2013) Cell Rep 5: 29-36

  • DOI: 10.1016/j.celrep.2013.08.036
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Accurate segregation of genetic material in eukaryotes relies on the kinetochore, a multiprotein complex that connects centromeric DNA with microtubules. In yeast and humans, two proteins-Mif2/CENP-C and Chl4/CNEP-N-interact with specialized centrome ...

    Accurate segregation of genetic material in eukaryotes relies on the kinetochore, a multiprotein complex that connects centromeric DNA with microtubules. In yeast and humans, two proteins-Mif2/CENP-C and Chl4/CNEP-N-interact with specialized centromeric nucleosomes and establish distinct but cross-connecting axes of chromatin-microtubule linkage. Proteins recruited by Chl4/CENP-N include a subset that regulates chromosome transmission fidelity. We show that Chl4 and a conserved member of this subset, Iml3, both from Saccharomyces cerevisiae, form a stable protein complex that interacts with Mif2 and Sgo1. We have determined the structures of an Iml3 homodimer and an Iml3-Chl4 heterodimer, which suggest a mechanism for regulating the assembly of this functional axis of the kinetochore. We propose that at the core centromere, the Chl4-Iml3 complex participates in recruiting factors, such as Sgo1, that influence sister chromatid cohesion and encourage sister kinetochore biorientation.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Central kinetochore subunit IML3
A
245Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: IML3 (MCM19)
Find proteins for P38265 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P38265
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Central kinetochore subunit CHL4
B
101Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: CHL4 (CTF17, MCM17)
Find proteins for P38907 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P38907
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.282 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.183 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 38.483α = 90.00
b = 143.916β = 90.00
c = 146.909γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
ADSCdata collection
PHENIXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-16
    Type: Initial release
  • Version 1.1: 2013-11-06
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description