Crystal structure of lamin A/C fragment and assembly mechanisms of intermediate filaments

Experimental Data Snapshot

  • Resolution: 3.21 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 

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Structural basis for lamin assembly at the molecular level.

Ahn, J.Jo, I.Kang, S.M.Hong, S.Kim, S.Jeong, S.Kim, Y.H.Park, B.J.Ha, N.C.

(2019) Nat Commun 10: 3757-3757

  • DOI: https://doi.org/10.1038/s41467-019-11684-x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Nuclear structure and function are governed by lamins, which are intermediate filaments that mostly consist of α-helices. Different lamin assembly models have been proposed based on low resolution and fragmented structures. However, their assembly mechanisms are still poorly understood at the molecular level. Here, we present the crystal structure of a long human lamin fragment at 3.2 Å resolution that allows the visualization of the features of the full-length protein. The structure shows an anti-parallel arrangement of the two coiled-coil dimers, which is important for the assembly process. We further discover an interaction between the lamin dimers by using chemical cross-linking and mass spectrometry analysis. Based on these two interactions, we propose a molecular mechanism for lamin assembly that is in agreement with a recent model representing the native state and could explain pathological mutations. Our findings also provide the molecular basis for assembly mechanisms of other intermediate filaments.

  • Organizational Affiliation

    Department of Agricultural Biotechnology, Center for Food Safety and Toxicology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, CALS, Seoul National University, Seoul, 08826, Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lamin A/C
A, B, C, D
304Homo sapiensMutation(s): 0 
Gene Names: LMNALMN1
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
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B, C, D
Experimental Data & Validation

Experimental Data

  • Resolution: 3.21 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 231.267α = 90
b = 84.997β = 90
c = 92.383γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Research Foundation (Korea)Korea, Republic OfNRF-2017R1A2B2003992
National Research Foundation (Korea)Korea, Republic OfNRF-2017M3A9F6029736

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-11
    Type: Initial release