1GK4

HUMAN VIMENTIN COIL 2B FRAGMENT (CYS2)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 

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This is version 1.2 of the entry. See complete history. 


Literature

Conserved Segments 1A and 2B of the Intermediate Filament Dimer: Their Atomic Structures and Role in Filament Assembly.

Strelkov, S., Herrmann, H., Geisler, N., Wedig, T., Zimbelmann, R., Aebi, U., Burkhard, P.

(2002) EMBO J 21: 1255

  • DOI: 10.1093/emboj/21.6.1255
  • Primary Citation of Related Structures:  
    1GK4, 1GK7, 1GK6

  • PubMed Abstract: 

    • Intermediate filaments (IFs) are key components of the cytoskeleton in higher eukaryotic cells. The elementary IF 'building block' is an elongated coiled-coil dimer consisting of four consecutive alpha-helical segments. The segments 1A and 2B include hig ...

    Intermediate filaments (IFs) are key components of the cytoskeleton in higher eukaryotic cells. The elementary IF 'building block' is an elongated coiled-coil dimer consisting of four consecutive alpha-helical segments. The segments 1A and 2B include highly conserved sequences and are critically involved in IF assembly. Based on the crystal structures of three human vimentin fragments at 1.4-2.3 A resolution (PDB entries 1gk4, 1gk6 and 1gk7), we have established the molecular organization of these two segments. The fragment corresponding to segment 1A forms a single, amphipatic alpha-helix, which is compatible with a coiled-coil geometry. While this segment might yield a coiled coil within an isolated dimer, monomeric 1A helices are likely to play a role in specific dimer-dimer interactions during IF assembly. The 2B segment reveals a double-stranded coiled coil, which unwinds near residue Phe351 to accommodate a 'stutter'. A fragment containing the last seven heptads of 2B interferes heavily with IF assembly and also transforms mature vimentin filaments into a new kind of structure. These results provide the first insight into the architecture and functioning of IFs at the atomic level.

    Related Citations: 
    • Divide-and-Conquer Crystallographic Approach Towards an Atomic Structure of Intermediate Filaments
      Strelkov, S.V., Herrmann, H., Geisler, N., Lustig, A., Ivaninskii, S., Zimbelmann, R., Burkhard, P., Aebi, U.
      (2001) J Mol Biol 306: 773
    • The Intermediate Filament Protein Consensus Motif of Helix 2B: Its Atomic Structure and Contribution to Assembly
      Herrmann, H., Strelkov, S.V., Feja, B., Rogers, K.R., Brettel, M., Lustig, A., Haner, M., Parry, D.A.D., Steinert, P.M., Burkhard, P., Aebi, U.
      (2000) J Mol Biol 298: 817
    Organizational Affiliation: 

    Maurice E.Müller Institute for Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland. sergei-v.strelkov@unibas.ch



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VIMENTIN A, B, C, D, E, F84Homo sapiensMutation(s): 0 
Gene Names: VIM
Find proteins for P08670 (Homo sapiens)
Explore P08670 
Go to UniProtKB:  P08670
NIH Common Fund Data Resources
PHAROS:  P08670
GTEx:  ENSG00000026025
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT
Download Ideal Coordinates CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.594α = 90
b = 84.283β = 90
c = 240.785γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-15
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance