Lamin A 17-70 coil1A dimer stabilized by C-terminal capping

Experimental Data Snapshot

  • Resolution: 1.83 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


Addressing the Molecular Mechanism of Longitudinal Lamin Assembly Using Chimeric Fusions.

Stalmans, G.Lilina, A.V.Vermeire, P.J.Fiala, J.Novak, P.Strelkov, S.V.

(2020) Cells 9

  • DOI: https://doi.org/10.3390/cells9071633
  • Primary Citation of Related Structures:  
    6YF5, 6YJD, 6YSH

  • PubMed Abstract: 

    The molecular architecture and assembly mechanism of intermediate filaments have been enigmatic for decades. Among those, lamin filaments are of particular interest due to their universal role in cell nucleus and numerous disease-related mutations. Filament assembly is driven by specific interactions of the elementary dimers, which consist of the central coiled-coil rod domain flanked by non-helical head and tail domains. We aimed to investigate the longitudinal 'head-to-tail' interaction of lamin dimers (the so-called A CN interaction), which is crucial for filament assembly. To this end, we prepared a series of recombinant fragments of human lamin A centred around the N- and C-termini of the rod. The fragments were stabilized by fusions to heterologous capping motifs which provide for a correct formation of parallel, in-register coiled-coil dimers. As a result, we established crystal structures of two N-terminal fragments one of which highlights the propensity of the coiled-coil to open up, and one C-terminal rod fragment. Additional studies highlighted the capacity of such N- and C-terminal fragments to form specific complexes in solution, which were further characterized using chemical cross-linking. These data yielded a molecular model of the A CN complex which features a 6.5 nm overlap of the rod ends.

  • Organizational Affiliation

    Laboratory for Biocrystallography, KU Leuven, 3000 Leuven, Belgium.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Prelamin-A/C,Microtubule-associated protein RP/EB family member 1
A, B, C, D
91Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q15691 (Homo sapiens)
Explore Q15691 
Go to UniProtKB:  Q15691
PHAROS:  Q15691
GTEx:  ENSG00000101367 
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 GroupsP02545Q15691
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.83 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 27.374α = 90
b = 105.246β = 90
c = 119.773γ = 90
Software Package:
Software NamePurpose
xia2data reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
KU LeuvenBelgiumCELSA 18/044

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-02
    Type: Initial release
  • Version 1.1: 2024-01-24
    Changes: Data collection, Database references, Refinement description