3SSU

Crystal structure of vimentin coil1A/1B fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Atomic structure of the vimentin central alpha-helical domain and its implications for intermediate filament assembly.

Chernyatina, A.A.Nicolet, S.Aebi, U.Herrmann, H.Strelkov, S.V.

(2012) Proc Natl Acad Sci U S A 109: 13620-13625

  • DOI: 10.1073/pnas.1206836109
  • Primary Citation of Related Structures:  
    3S4R, 3SSU, 3SWK

  • PubMed Abstract: 
  • Together with actin filaments and microtubules, intermediate filaments (IFs) are the basic cytoskeletal components of metazoan cells. Over 80 human diseases have been linked to mutations in various IF proteins to date. However, the filament structure ...

    Together with actin filaments and microtubules, intermediate filaments (IFs) are the basic cytoskeletal components of metazoan cells. Over 80 human diseases have been linked to mutations in various IF proteins to date. However, the filament structure is far from being resolved at the atomic level, which hampers rational understanding of IF pathologies. The elementary building block of all IF proteins is a dimer consisting of an α-helical coiled-coil (CC) "rod" domain flanked by the flexible head and tail domains. Here we present three crystal structures of overlapping human vimentin fragments that comprise the first half of its rod domain. Given the previously solved fragments, a nearly complete atomic structure of the vimentin rod has become available. It consists of three α-helical segments (coils 1A, 1B, and 2) interconnected by linkers (L1 and L12). Most of the CC structure has a left-handed twist with heptad repeats, but both coil 1B and coil 2 also exhibit untwisted, parallel stretches with hendecad repeats. In the crystal structure, linker L1 was found to be α-helical without being involved in the CC formation. The available data allow us to construct an atomic model of the antiparallel tetramer representing the second level of vimentin assembly. Although the presence of the nonhelical head domains is essential for proper tetramer stabilization, the precise alignment of the dimers forming the tetramer appears to depend on the complementarity of their surface charge distribution patterns, while the structural plasticity of linker L1 and coil 1A plays a role in the subsequent IF assembly process.


    Organizational Affiliation

    Laboratory for Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, Katholieke Universiteit Leuven, Leuven, Belgium.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VimentinA, B93Homo sapiensMutation(s): 0 
Gene Names: FLJ36605VIM
Find proteins for P08670 (Homo sapiens)
Explore P08670 
Go to UniProtKB:  P08670
NIH Common Fund Data Resources
PHAROS  P08670
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.240 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.6α = 90
b = 83.497β = 90
c = 118.606γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHELXphasing
DMphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
GO.COMdata collection
SHELXDphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-15
    Type: Initial release
  • Version 1.1: 2013-07-03
    Changes: Database references