4DXT

Human SUN2 (AA 522-717)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

LINC Complexes Form by Binding of Three KASH Peptides to Domain Interfaces of Trimeric SUN Proteins.

Sosa, B.A.Rothballer, A.Kutay, U.Schwartz, T.U.

(2012) Cell 149: 1035-1047

  • DOI: 10.1016/j.cell.2012.03.046
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Linker of nucleoskeleton and cytoskeleton (LINC) complexes span the nuclear envelope and are composed of KASH and SUN proteins residing in the outer and inner nuclear membrane, respectively. LINC formation relies on direct binding of KASH and SUN in ...

    Linker of nucleoskeleton and cytoskeleton (LINC) complexes span the nuclear envelope and are composed of KASH and SUN proteins residing in the outer and inner nuclear membrane, respectively. LINC formation relies on direct binding of KASH and SUN in the perinuclear space. Thereby, molecular tethers are formed that can transmit forces for chromosome movements, nuclear migration, and anchorage. We present crystal structures of the human SUN2-KASH1/2 complex, the core of the LINC complex. The SUN2 domain is rigidly attached to a trimeric coiled coil that prepositions it to bind three KASH peptides. The peptides bind in three deep and expansive grooves formed between adjacent SUN domains, effectively acting as molecular glue. In addition, a disulfide between conserved cysteines on SUN and KASH covalently links both proteins. The structure provides the basis of LINC complex formation and suggests a model for how LINC complexes might arrange into higher-order clusters to enhance force-coupling.


    Organizational Affiliation

    Department of Biology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SUN domain-containing protein 2
A
198Homo sapiensMutation(s): 0 
Gene Names: SUN2 (FRIGG, KIAA0668, RAB5IP, UNC84B)
Find proteins for Q9UH99 (Homo sapiens)
Go to Gene View: SUN2
Go to UniProtKB:  Q9UH99
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.169 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 79.580α = 90.00
b = 79.580β = 90.00
c = 199.050γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-06
    Type: Initial release