6GHD

Structural analysis of the ternary complex between lamin A/C, BAF and emerin identifies an interface disrupted in autosomal recessive progeroid diseases


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural analysis of the ternary complex between lamin A/C, BAF and emerin identifies an interface disrupted in autosomal recessive progeroid diseases.

Samson, C.Petitalot, A.Celli, F.Herrada, I.Ropars, V.Le Du, M.H.Nhiri, N.Jacquet, E.Arteni, A.A.Buendia, B.Zinn-Justin, S.

(2018) Nucleic Acids Res. 46: 10460-10473

  • DOI: 10.1093/nar/gky736

  • PubMed Abstract: 
  • Lamins are the main components of the nucleoskeleton. Whereas their 3D organization was recently described using cryoelectron tomography, no structural data highlights how they interact with their partners at the interface between the inner nuclear e ...

    Lamins are the main components of the nucleoskeleton. Whereas their 3D organization was recently described using cryoelectron tomography, no structural data highlights how they interact with their partners at the interface between the inner nuclear envelope and chromatin. A large number of mutations causing rare genetic disorders called laminopathies were identified in the C-terminal globular Igfold domain of lamins A and C. We here present a first structural description of the interaction between the lamin A/C immunoglobulin-like domain and emerin, a nuclear envelope protein. We reveal that this lamin A/C domain both directly binds self-assembled emerin and interacts with monomeric emerin LEM domain through the dimeric chromatin-associated Barrier-to-Autointegration Factor (BAF) protein. Mutations causing autosomal recessive progeroid syndromes specifically impair proper binding of lamin A/C domain to BAF, thus destabilizing the link between lamin A/C and BAF in cells. Recent data revealed that, during nuclear assembly, BAF's ability to bridge distant DNA sites is essential for guiding membranes to form a single nucleus around the mitotic chromosome ensemble. Our results suggest that BAF interaction with lamin A/C also plays an essential role, and that mutations associated with progeroid syndromes leads to a dysregulation of BAF-mediated chromatin organization and gene expression.


    Organizational Affiliation

    Institut de Chimie des Substances Naturelles, Université Paris Sud, Université Paris-Saclay, CNRS UPR 2301, Gif-sur-Yvette, France.,Unité de Biologie Fonctionnelle et Adaptative (BFA), CNRS UMR 8251, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Emerin
G, H
45Homo sapiensMutation(s): 0 
Gene Names: EMD (EDMD, STA)
Find proteins for P50402 (Homo sapiens)
Go to Gene View: EMD
Go to UniProtKB:  P50402
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Barrier-to-autointegration factor
D, E, A, C
88Homo sapiensMutation(s): 4 
Gene Names: BANF1 (BAF, BCRG1)
Find proteins for O75531 (Homo sapiens)
Go to Gene View: BANF1
Go to UniProtKB:  O75531
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Prelamin-A/C
B, F
119Homo sapiensMutation(s): 0 
Gene Names: LMNA (LMN1)
Find proteins for P02545 (Homo sapiens)
Go to Gene View: LMNA
Go to UniProtKB:  P02545
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, C, D, E, G, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.192 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 57.770α = 66.44
b = 62.750β = 66.55
c = 64.340γ = 88.05
Software Package:
Software NamePurpose
MOLREPphasing
APEXdata scaling
Cootmodel building
PDB_EXTRACTdata extraction
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2018-08-29
    Type: Data collection, Database references
  • Version 1.2: 2018-11-14
    Type: Data collection, Database references