6WMF

Human Sun2-KASH5 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Analysis of Different LINC Complexes Reveals Distinct Binding Modes.

Cruz, V.E.Esra Demircioglu, F.Schwartz, T.U.

(2020) J Mol Biol 432: 6028-6041

  • DOI: 10.1016/j.jmb.2020.09.019
  • Primary Citation of Related Structures:  
    6WMD, 6WME, 6WMF, 6WMG

  • PubMed Abstract: 
  • Linker of nucleoskeleton and cytoskeleton (LINC) complexes are molecular tethers that span the nuclear envelope (NE) and physically connect the nucleus to the cytoskeleton. They transmit mechanical force across the NE in processes such as nuclear anchorage, nuclear migration, and homologous chromosome pairing during meiosis ...

    Linker of nucleoskeleton and cytoskeleton (LINC) complexes are molecular tethers that span the nuclear envelope (NE) and physically connect the nucleus to the cytoskeleton. They transmit mechanical force across the NE in processes such as nuclear anchorage, nuclear migration, and homologous chromosome pairing during meiosis. LINC complexes are composed of KASH proteins traversing the outer nuclear membrane, and SUN proteins crossing the inner nuclear membrane. Humans have several SUN- and KASH-containing proteins, yet what governs their proper engagement is poorly understood. To investigate this question, we solved high resolution crystal structures of human SUN2 in complex with the KASH-peptides of Nesprin3, Nesprin4, and KASH5. In comparison to the published structures of SUN2-KASH1/2 we observe alternative binding modes for these KASH peptides. While the core interactions between SUN and the C-terminal residues of the KASH peptide are similar in all five complexes, the extended KASH-peptide adopts at least two different conformations. The much-improved resolution allows for a more detailed analysis of other elements critical for KASH interaction, including the KASH-lid and the cation loop, and a possible self-locked state for unbound SUN. In summary, we observe distinct differences between the examined SUN-KASH complexes. These differences may have an important role in regulating the SUN-KASH network.


    Organizational Affiliation

    Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Electronic address: tus@mit.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SUN domain-containing protein 2A202Homo sapiensMutation(s): 0 
Gene Names: SUN2FRIGGKIAA0668RAB5IPUNC84B
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UH99 (Homo sapiens)
Explore Q9UH99 
Go to UniProtKB:  Q9UH99
PHAROS:  Q9UH99
GTEx:  ENSG00000100242 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UH99
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein KASH5B27Homo sapiensMutation(s): 0 
Gene Names: CCDC155KASH5
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N6L0 (Homo sapiens)
Explore Q8N6L0 
Go to UniProtKB:  Q8N6L0
PHAROS:  Q8N6L0
GTEx:  ENSG00000161609 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8N6L0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download Ideal Coordinates CCD File 
C [auth A]POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.228 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.435α = 90
b = 78.435β = 90
c = 249.441γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)United StatesAR065484

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-02
    Type: Initial release
  • Version 1.1: 2020-12-09
    Changes: Database references