6EQT

CRYSTAL STRUCTURE OF THE HUMAN KINETOCHORE PROTEIN CENP-N


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.73 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Decoding the centromeric nucleosome through CENP-N.

Pentakota, S.Zhou, K.Smith, C.Maffini, S.Petrovic, A.Morgan, G.P.Weir, J.R.Vetter, I.R.Musacchio, A.Luger, K.

(2017) Elife 6

  • DOI: 10.7554/eLife.33442
  • Primary Citation of Related Structures:  
    6C0W, 6EQT

  • PubMed Abstract: 
  • Centromere protein (CENP) A, a histone H3 variant, is a key epigenetic determinant of chromosome domains known as centromeres. Centromeres nucleate kinetochores, multi-subunit complexes that capture spindle microtubules to promote chromosome segregat ...

    Centromere protein (CENP) A, a histone H3 variant, is a key epigenetic determinant of chromosome domains known as centromeres. Centromeres nucleate kinetochores, multi-subunit complexes that capture spindle microtubules to promote chromosome segregation during mitosis. Two kinetochore proteins, CENP-C and CENP-N, recognize CENP-A in the context of a rare CENP-A nucleosome. Here, we reveal the structural basis for the exquisite selectivity of CENP-N for centromeres. CENP-N uses charge and space complementarity to decode the L1 loop that is unique to CENP-A. It also engages in extensive interactions with a 15-base pair segment of the distorted nucleosomal DNA double helix, in a position predicted to exclude chromatin remodelling enzymes. Besides CENP-A, stable centromere recruitment of CENP-N requires a coincident interaction with a newly identified binding motif on nucleosome-bound CENP-C. Collectively, our studies clarify how CENP-N and CENP-C decode and stabilize the non-canonical CENP-A nucleosome to enforce epigenetic centromere specification and kinetochore assembly.


    Organizational Affiliation

    Howard Hughes Medical Institute, Maryland, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein NAB219Homo sapiensMutation(s): 1 
Gene Names: CENPNC16orf60ICEN32BM-309
Find proteins for Q96H22 (Homo sapiens)
Explore Q96H22 
Go to UniProtKB:  Q96H22
NIH Common Fund Data Resources
PHAROS  Q96H22
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.73 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.3α = 90
b = 87.3β = 90
c = 81.1γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XSCALEdata reduction
PDB_EXTRACTdata extraction
XSCALEdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2018-01-31
    Changes: Refinement description