4DXR

Human SUN2-KASH1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.177 

wwPDB Validation 3D Report Full Report



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:  
    4DXR, 4DXS, 4DXT

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SUN domain-containing protein 2A202Homo sapiensMutation(s): 0 
Gene Names: SUN2FRIGGKIAA0668RAB5IPUNC84B
Find proteins for Q9UH99 (Homo sapiens)
Explore Q9UH99 
Go to UniProtKB:  Q9UH99
NIH Common Fund Data Resources
PHAROS  Q9UH99
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nesprin-1B35Homo sapiensMutation(s): 0 
Gene Names: SYNE1C6orf98KIAA0796KIAA1262KIAA1756MYNE1
Find proteins for Q8NF91 (Homo sapiens)
Explore Q8NF91 
Go to UniProtKB:  Q8NF91
NIH Common Fund Data Resources
PHAROS  Q8NF91
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DMU
Query on DMU

Download CCD File 
A
DECYL-BETA-D-MALTOPYRANOSIDE
C22 H42 O11
WOQQAWHSKSSAGF-WXFJLFHKSA-N
 Ligand Interaction
K
Query on K

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.177 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.641α = 90
b = 79.641β = 90
c = 256.409γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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