2FMM

Crystal Structure of EMSY-HP1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the HP1-EMSY complex reveals an unusual mode of HP1 binding.

Huang, Y.Myers, M.P.Xu, R.M.

(2006) Structure 14: 703-712

  • DOI: 10.1016/j.str.2006.01.007

  • PubMed Abstract: 
  • Heterochromatin protein-1 (HP1) plays an essential role in both the assembly of higher-order chromatin structure and epigenetic inheritance. The C-terminal chromo shadow domain (CSD) of HP1 is responsible for homodimerization and interaction with a n ...

    Heterochromatin protein-1 (HP1) plays an essential role in both the assembly of higher-order chromatin structure and epigenetic inheritance. The C-terminal chromo shadow domain (CSD) of HP1 is responsible for homodimerization and interaction with a number of chromatin-associated nonhistone proteins, including EMSY, which is a BRCA2-interacting protein that has been implicated in the development of breast and ovarian cancer. We have determined the crystal structure of the HP1beta CSD in complex with the N-terminal domain of EMSY at 1.8 A resolution. Surprisingly, the structure reveals that EMSY is bound by two HP1 CSD homodimers, and the binding sequences differ from the consensus HP1 binding motif PXVXL. This structural information expands our understanding of HP1 binding specificity and provides insights into interactions between HP1 homodimers that are likely to be important for heterochromatin formation.


    Organizational Affiliation

    Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein EMSY
E
133Homo sapiensMutation(s): 0 
Gene Names: EMSY (C11orf30)
Find proteins for Q7Z589 (Homo sapiens)
Go to Gene View: EMSY
Go to UniProtKB:  Q7Z589
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Chromobox protein homolog 1
A, B, C, D
74Homo sapiensMutation(s): 0 
Gene Names: CBX1 (CBX)
Find proteins for P83916 (Homo sapiens)
Go to Gene View: CBX1
Go to UniProtKB:  P83916
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.219 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 143.400α = 90.00
b = 63.870β = 90.00
c = 66.640γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
SOLVEphasing
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-01-09 
  • Released Date: 2006-05-23 
  • Deposition Author(s): Huang, Y.

Revision History 

  • Version 1.0: 2006-05-23
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance