4XYI

Mis16 with H4 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Mis16 Independently Recognizes Histone H4 and the CENP-ACnp1-Specific Chaperone Scm3sp.

An, S.Kim, H.Cho, U.S.

(2015) J.Mol.Biol. 427: 3230-3240

  • DOI: 10.1016/j.jmb.2015.08.022
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CENP-A is a centromere-specific histone H3 variant that is required for kinetochore assembly and accurate chromosome segregation. For it to function properly, CENP-A must be specifically localized to centromeres. In fission yeast, Scm3sp and the Mis1 ...

    CENP-A is a centromere-specific histone H3 variant that is required for kinetochore assembly and accurate chromosome segregation. For it to function properly, CENP-A must be specifically localized to centromeres. In fission yeast, Scm3sp and the Mis18 complex, composed of Mis16, Eic1, and Mis18, function as a CENP-A(Cnp1)-specific chaperone and a recruiting factor, respectively, and together ensure accurate delivery of CENP-A(Cnp1) to centromeres. Although how Scm3sp specifically recognizes CENP-A(Cnp1) has been revealed recently, the recruiting mechanism of CENP-A(Cnp1) via the Mis18 complex remains unknown. In this study, we have determined crystal structures of Schizosaccharomyces japonicus Mis16 alone and in complex with the helix 1 of histone H4 (H4α1). Crystal structures followed by mutant analysis and affinity pull-downs have revealed that Mis16 recognizes both H4α1 and Scm3sp independently within the CENP-A(Cnp1)/H4:Scm3sp complex. This observation suggests that Mis16 gains CENP-A(Cnp1) specificity by recognizing both Scm3sp and histone H4. Our studies provide insights into the molecular mechanisms underlying specific recruitment of CENP-A(Cnp1)/H4:Scm3sp into centromeres.


    Organizational Affiliation

    Department of Biological Chemistry, University of Michigan Medical School, 1150 West Medical Center Drive, SPC 5606, Ann Arbor, MI 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kinetochore protein Mis16
A
430Schizosaccharomyces japonicus (strain yFS275 / FY16936)Mutation(s): 0 
Find proteins for B6K598 (Schizosaccharomyces japonicus (strain yFS275 / FY16936))
Go to UniProtKB:  B6K598
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H4
B
103Schizosaccharomyces japonicus (strain yFS275 / FY16936)Mutation(s): 0 
Find proteins for B6JV96 (Schizosaccharomyces japonicus (strain yFS275 / FY16936))
Go to UniProtKB:  B6JV96
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.200 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 136.226α = 90.00
b = 136.226β = 90.00
c = 65.536γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-03
    Type: Initial release
  • Version 1.1: 2016-02-17
    Type: Database references
  • Version 1.2: 2018-06-13
    Type: Data collection, Database references, Derived calculations