6XWS

Crystal Structure of Drosophila CAL1 1-160 bound to CENP-A/H4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.36 Å
  • R-Value Free: 0.323 
  • R-Value Work: 0.306 
  • R-Value Observed: 0.307 

wwPDB Validation 3D Report Full Report



Literature

Structural basis for centromere maintenance by Drosophila CENP-A chaperone CAL1.

Medina-Pritchard, B.Lazou, V.Zou, J.Byron, O.Abad, M.A.Rappsilber, J.Heun, P.Jeyaprakash, A.A.

(2020) EMBO J 39: e103234-e103234

  • DOI: 10.15252/embj.2019103234
  • Primary Citation of Related Structures:  
    6XWT, 6XWS, 6XWV, 6XWU

  • PubMed Abstract: 
  • Centromeres are microtubule attachment sites on chromosomes defined by the enrichment of histone variant CENP-A-containing nucleosomes. To preserve centromere identity, CENP-A must be escorted to centromeres by a CENP-A-specific chaperone for deposit ...

    Centromeres are microtubule attachment sites on chromosomes defined by the enrichment of histone variant CENP-A-containing nucleosomes. To preserve centromere identity, CENP-A must be escorted to centromeres by a CENP-A-specific chaperone for deposition. Despite this essential requirement, many eukaryotes differ in the composition of players involved in centromere maintenance, highlighting the plasticity of this process. In humans, CENP-A recognition and centromere targeting are achieved by HJURP and the Mis18 complex, respectively. Using X-ray crystallography, we here show how Drosophila CAL1, an evolutionarily distinct CENP-A histone chaperone, binds both CENP-A and the centromere receptor CENP-C without the requirement for the Mis18 complex. While an N-terminal CAL1 fragment wraps around CENP-A/H4 through multiple physical contacts, a C-terminal CAL1 fragment directly binds a CENP-C cupin domain dimer. Although divergent at the primary structure level, CAL1 thus binds CENP-A/H4 using evolutionarily conserved and adaptive structural principles. The CAL1 binding site on CENP-C is strategically positioned near the cupin dimerisation interface, restricting binding to just one CAL1 molecule per CENP-C dimer. Overall, by demonstrating how CAL1 binds CENP-A/H4 and CENP-C, we provide key insights into the minimalistic principles underlying centromere maintenance.


    Related Citations: 
    • Towards automated crystallographic structure refinement with phenix.refine.
      Afonine, P.V.
      (2012) Acta Crystallogr D Biol Crystallogr 68: 352

    Organizational Affiliation

    Wellcome Centre for Cell Biology, University of Edinburgh, Edinburgh, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H3-like centromeric protein cidA225Drosophila melanogasterMutation(s): 0 
Gene Names: cidCENP-ACG13329
Find proteins for Q9V6Q2 (Drosophila melanogaster)
Explore Q9V6Q2 
Go to UniProtKB:  Q9V6Q2
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4B103Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P84040 (Drosophila melanogaster)
Explore P84040 
Go to UniProtKB:  P84040
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Chromosome alignment defect 1,Chromosome alignment defect 1C108Drosophila melanogasterMutation(s): 0 
Gene Names: Cal1CLD2Dmel\CG5148CG5148Dmel_CG5148
Find proteins for Q9VEN2 (Drosophila melanogaster)
Explore Q9VEN2 
Go to UniProtKB:  Q9VEN2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.36 Å
  • R-Value Free: 0.323 
  • R-Value Work: 0.306 
  • R-Value Observed: 0.307 
  • Space Group: P 63 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 199.7α = 90
b = 199.7β = 90
c = 76.754γ = 120
Software Package:
Software NamePurpose
AutoPROCdata processing
PHENIXrefinement
STARANISOdata scaling
Cootmodel building
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom202811

Revision History 

  • Version 1.0: 2020-04-15
    Type: Initial release