Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.28 kDa 
• Atom Count: 444 
• Residue Count: 60 
• Unique protein chains: 1

2LJ2

Integral membrane core domain of the mercury transporter MerF in lipid bilayer membranes

• DOI: 10.2210/pdb2LJ2/pdb
• BMRB: 17914

• Classification: MEMBRANE PROTEIN
• Organism(s): Morganella morganii
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-09-03 Released: 2012-01-18 
• Deposition Author(s): Das, B.B., Nothnagel, H.J., Lu, G.J., Son, W., Park, S., Tian, Y.B., Marassi, F.M., Opella, S.J.

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Experimental Data Snapshot

• Method: SOLID-STATE NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Structure determination of a membrane protein in proteoliposomes.

Das, B.B., Nothnagel, H.J., Lu, G.J., Son, W.S., Tian, Y., Marassi, F.M., Opella, S.J.

(2012) J Am Chem Soc 134: 2047-2056

• PubMed: 22217388 
• DOI: 10.1021/ja209464f
• Primary Citation of Related Structures:  
  2LJ2


• PubMed Abstract: 
  

An NMR method for determining the three-dimensional structures of membrane proteins in proteoliposomes is demonstrated by determining the structure of MerFt, the 60-residue helix-loop-helix integral membrane core of the 81-residue mercury transporter MerF. The method merges elements of oriented sample (OS) solid-state NMR and magic angle spinning (MAS) solid-state NMR techniques to measure orientation restraints relative to a single external axis (the bilayer normal) from individual residues in a uniformly (13)C/(15)N labeled protein in unoriented liquid crystalline phospholipid bilayers. The method relies on the fast (>10(5) Hz) rotational diffusion of membrane proteins in bilayers to average the static chemical shift anisotropy and heteronuclear dipole-dipole coupling powder patterns to axially symmetric powder patterns with reduced frequency spans. The frequency associated with the parallel edge of such motionally averaged powder patterns is exactly the same as that measured from the single line resonance in the spectrum of a stationary sample that is macroscopically aligned parallel to the direction of the applied magnetic field. All data are collected on unoriented samples undergoing MAS. Averaging of the homonuclear (13)C/(13)C dipolar couplings, by MAS of the sample, enables the use of uniformly (13)C/(15)N labeled proteins, which provides enhanced sensitivity through direct (13)C detection as well as the use of multidimensional MAS solid-state NMR methods for resolving and assigning resonances. The unique feature of this method is the measurement of orientation restraints that enable the protein structure and orientation to be determined in unoriented proteoliposomes.

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0307, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MerF	A	60	Morganella morganii	Mutation(s): 0  Gene Names: merF
Find proteins for Q56446 (Morganella morganii) Explore Q56446  Go to UniProtKB:  Q56446

Experimental Data & Validation

Experimental Data

• Method: SOLID-STATE NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LJ2 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-09-03 
• Released Date: 2012-01-18 
Deposition Author(s): Das, B.B., Nothnagel, H.J., Lu, G.J., Son, W., Park, S., Tian, Y.B., Marassi, F.M., Opella, S.J.

Revision History 

• Version 1.0: 2012-01-18
  Type: Initial release
  
• Version 1.1: 2012-02-15
  Changes: Database references