Human lamin coil 2B

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.276 

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This is version 1.3 of the entry. See complete history


Crystal structure of the human lamin A coil 2B dimer: implications for the head-to-tail association of nuclear lamins

Strelkov, S.V.Schumacher, J.Burkhard, P.Aebi, U.Herrmann, H.

(2004) J Mol Biol 343: 1067-1080

  • DOI: https://doi.org/10.1016/j.jmb.2004.08.093
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Nuclear intermediate filaments (IFs) are made from fibrous proteins termed lamins that assemble, in association with several transmembrane proteins of the inner nuclear membrane and an unknown number of chromatin proteins, into a filamentous scaffold called the nuclear lamina. In man, three types of lamins with significant sequence identity, i.e. lamin A/C, lamin B1 and B2, are expressed. The molecular characteristics of the filaments they form and the details of the assembly mechanism are still largely unknown. Here we report the crystal structure of the coiled-coil dimer from the second half of coil 2 from human lamin A at 2.2A resolution. Comparison to the recently solved structure of the homologous segment of human vimentin reveals a similar overall structure but a different distribution of charged residues and a different pattern of intra- and interhelical salt bridges. These features may explain, at least in part, the differences observed between the lamin and vimentin assembly pathways. Employing a modeled lamin A coil 1A dimer, we propose that the head-to-tail association of two lamin dimers involves strong electrostatic attractions of distinct clusters of negative charge located on the opposite ends of the rod domain with arginine clusters in the head domain and the first segment of the tail domain. Moreover, lamin A mutations, including several in coil 2B, have been associated with human laminopathies. Based on our data most of these mutations are unlikely to alter the structure of the dimer but may affect essential molecular interactions occurring in later stages of filament assembly and lamina formation.

  • Organizational Affiliation

    Maurice E. Müller Institute for Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lamin A/C86Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P02545 (Homo sapiens)
Explore P02545 
Go to UniProtKB:  P02545
PHAROS:  P02545
GTEx:  ENSG00000160789 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02545
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.276 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.267α = 90
b = 89.267β = 90
c = 75.589γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-16
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Derived calculations, Version format compliance
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references