5DZZ

Structural characterization of intermediate filaments binding domain of desmoplakin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structure of the Intermediate Filament-Binding Region of Desmoplakin.

Kang, H.Weiss, T.M.Bang, I.Weis, W.I.Choi, H.J.

(2016) PLoS One 11: e0147641-e0147641

  • DOI: https://doi.org/10.1371/journal.pone.0147641
  • Primary Citation of Related Structures:  
    5DZZ

  • PubMed Abstract: 

    Desmoplakin (DP) is a cytoskeletal linker protein that connects the desmosomal cadherin/plakoglobin/plakophilin complex to intermediate filaments (IFs). The C-terminal region of DP (DPCT) mediates IF binding, and contains three plakin repeat domains (PRDs), termed PRD-A, PRD-B and PRD-C. Previous crystal structures of PRDs B and C revealed that each is formed by 4.5 copies of a plakin repeat (PR) and has a conserved positively charged groove on its surface. Although PRDs A and B are linked by just four amino acids, B and C are separated by a 154 residue flexible linker, which has hindered crystallographic analysis of the full DPCT. Here we present the crystal structure of a DPCT fragment spanning PRDs A and B, and elucidate the overall architecture of DPCT by small angle X-ray scattering (SAXS) analysis. The structure of PRD-A is similar to that of PRD-B, and the two domains are arranged in a quasi-linear arrangement, and separated by a 4 amino acid linker. Analysis of the B-C linker region using secondary structure prediction and the crystal structure of a homologous linker from the cytolinker periplakin suggests that the N-terminal ~100 amino acids of the linker form two PR-like motifs. SAXS analysis of DPCT indicates an elongated but non-linear shape with Rg = 51.5 Å and Dmax = 178 Å. These data provide the first structural insights into an IF binding protein containing multiple PRDs and provide a foundation for studying the molecular basis of DP-IF interactions.


  • Organizational Affiliation

    Dept. of Biological Sciences, Seoul National University, Seoul, South Korea.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Desmoplakin494Homo sapiensMutation(s): 0 
Gene Names: DSP
UniProt & NIH Common Fund Data Resources
Find proteins for P15924 (Homo sapiens)
Explore P15924 
Go to UniProtKB:  P15924
PHAROS:  P15924
GTEx:  ENSG00000096696 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15924
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.931α = 90
b = 64.466β = 90
c = 74.044γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
Cootmodel building
PHENIXrefinement
PDB_EXTRACTdata extraction
SCALAdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-23
    Type: Initial release
  • Version 1.1: 2019-12-04
    Changes: Data collection, Derived calculations
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Refinement description