6JLB

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.21 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report



Literature

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: 10.1038/s41467-019-11684-x
  • Primary Citation of Related Structures:  
    6JLB

  • 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 mechan ...

    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. hanc210@snu.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Lamin A/C ABCD304Homo sapiensMutation(s): 0 
Gene Names: LMNALMN1
Find proteins for P02545 (Homo sapiens)
Explore P02545 
Go to UniProtKB:  P02545
NIH Common Fund Data Resources
PHAROS:  P02545
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,B,C,DL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
PHENIXrefinement
HKL-2000data scaling
PHASERphasing
SHELXCDphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-03-04 
  • Released Date: 2019-09-11 
  • Deposition Author(s): Ahn, J., Jo, I., Ha, N.C.

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

Revision History 

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