1GJJ

N-TERMINAL CONSTANT REGION OF THE NUCLEAR ENVELOPE PROTEIN LAP2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: RESTRAINED REGULARIZED MEAN STRUCTURE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the constant region of nuclear envelope protein LAP2 reveals two LEM-domain structures: one binds BAF and the other binds DNA.

Cai, M.Huang, Y.Ghirlando, R.Wilson, K.L.Craigie, R.Clore, G.M.

(2001) Embo J. 20: 4399-4407

  • DOI: 10.1093/emboj/20.16.4399

  • PubMed Abstract: 
  • The nuclear envelope proteins LAP2, emerin and MAN1 share a conserved approximately 40-residue 'LEM' motif. Loss of emerin causes Emery-Dreifuss muscular dystrophy. We have solved the solution NMR structure of the constant region of human LAP2 (resid ...

    The nuclear envelope proteins LAP2, emerin and MAN1 share a conserved approximately 40-residue 'LEM' motif. Loss of emerin causes Emery-Dreifuss muscular dystrophy. We have solved the solution NMR structure of the constant region of human LAP2 (residues 1-168). Human LAP2(1-168) has two structurally independent, non-interacting domains located at residues 1-50 ('LAP2-N') and residues 111-152 (LEM-domain), connected by an approximately 60-residue flexible linker. The two domains are structurally homologous, comprising a helical turn followed by two helices connected by an 11-12-residue loop. This motif is shared by subdomains of T4 endonuclease VII and transcription factor rho, despite negligible (< or =15%) sequence identity. NMR chemical shift mapping demonstrated that the LEM-domain binds BAF (barrier-to-autointegration factor), whereas LAP2-N binds DNA. Both binding surfaces comprise helix 1, the N-terminus of helix 2 and the inter-helical loop. Binding selectivity is determined by the nature of the surface residues in these binding sites, which are predominantly positively charged for LAP2-N and hydrophobic for the LEM-domain. Thus, LEM and LEM-like motifs form a common structure that evolution has customized for binding to BAF or DNA.


    Organizational Affiliation

    Laboratory of Chemical Physics, Building 5, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0510, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LAP2
A
168Homo sapiensGene Names: TMPO (LAP2)
Find proteins for P42166 (Homo sapiens)
Go to Gene View: TMPO
Go to UniProtKB:  P42166
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: RESTRAINED REGULARIZED MEAN STRUCTURE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2001-06-25 
  • Released Date: 2003-06-24 
  • Deposition Author(s): Clore, G.M., Cai, M.

Revision History 

  • Version 1.0: 2003-06-24
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance