3Q6S

The crystal structure of the heterochromatin protein 1 beta chromoshadow domain complexed with a peptide from Shugoshin 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mitotic centromeric targeting of HP1 and its binding to Sgo1 are dispensable for sister-chromatid cohesion in human cells.

Kang, J.Chaudhary, J.Dong, H.Kim, S.Brautigam, C.A.Yu, H.

(2011) Mol Biol Cell 22: 1181-1190

  • DOI: 10.1091/mbc.E11-01-0009

  • PubMed Abstract: 
  • Human Shugoshin 1 (Sgo1) protects centromeric sister-chromatid cohesion during prophase and prevents premature sister-chromatid separation. Heterochromatin protein 1 (HP1) has been proposed to protect centromeric sister-chromatid cohesion by directly ...

    Human Shugoshin 1 (Sgo1) protects centromeric sister-chromatid cohesion during prophase and prevents premature sister-chromatid separation. Heterochromatin protein 1 (HP1) has been proposed to protect centromeric sister-chromatid cohesion by directly targeting Sgo1 to centromeres in mitosis. Here we show that HP1α is targeted to mitotic centromeres by INCENP, a subunit of the chromosome passenger complex (CPC). Biochemical and structural studies show that both HP1-INCENP and HP1-Sgo1 interactions require the binding of the HP1 chromo shadow domain to PXVXL/I motifs in INCENP or Sgo1, suggesting that the INCENP-bound, centromeric HP1α is incapable of recruiting Sgo1. Consistently, a Sgo1 mutant deficient in HP1 binding is functional in centromeric cohesion protection and localizes normally to centromeres in mitosis. By contrast, INCENP or Sgo1 mutants deficient in HP1 binding fail to localize to centromeres in interphase. Therefore, our results suggest that HP1 binding by INCENP or Sgo1 is dispensable for centromeric cohesion protection during mitosis of human cells, but might regulate yet uncharacterized interphase functions of CPC or Sgo1 at the centromeres.


    Organizational Affiliation

    Department of Pharmacology, Howard Hughes Medical Institute, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chromobox protein homolog 1
A, B, C, D
78Homo sapiensMutation(s): 0 
Gene Names: CBX1 (CBX)
Find proteins for P83916 (Homo sapiens)
Go to Gene View: CBX1
Go to UniProtKB:  P83916
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Shugoshin-like 1
E, F
19Homo sapiensMutation(s): 0 
Gene Names: SGO1 (SGOL1)
Find proteins for Q5FBB7 (Homo sapiens)
Go to Gene View: SGO1
Go to UniProtKB:  Q5FBB7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.190 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 76.816α = 90.00
b = 108.893β = 90.00
c = 41.938γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASERphasing
SBC-Collectdata collection
PHENIXrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-14
    Type: Initial release
  • Version 1.1: 2013-02-13
    Type: Database references