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: 4.95 kDa 
• Atom Count: 349 
• Residue Count: 46 
• Unique protein chains: 1

1WAZ

NMR Structure Determination of the bacterial mercury transporter, MerF, in micelles

• DOI: 10.2210/pdb1WAZ/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Morganella morganii
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-10-28 Released: 2005-04-11 
• Deposition Author(s): Howell, S.C., Mesleh, M.F., Opella, S.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 15 
• Selection Criteria: LEAST RESTRAINT VIOLATION 

Literature

NMR Structure Determination of a Membrane Protein with Two Transmembrane Helices in Micelles: Merf of the Bacterial Mercury Detoxification System

Howell, S.C., Mesleh, M.F., Opella, S.J.

(2005) Biochemistry 44: 5196

• PubMed: 15794657 
• DOI: 10.1021/bi048095v
• Primary Citation of Related Structures:  
  1WAZ


• PubMed Abstract: 
  

The three-dimensional backbone structure of a membrane protein with two transmembrane helices in micelles was determined using solution NMR methods that rely on the measurement of backbone (1)H-(15)N residual dipolar couplings (RDCs) from samples of two different constructs that align differently in stressed polyacrylamide gels. Dipolar wave fitting to the (1)H-(15)N RDCs determines the helical boundaries based on periodicity and was utilized in the generation of supplemental dihedral restraints for the helical segments. The (1)H-(15)N RDCs and supplemental dihedral restraints enable the determination of the structure of the helix-loop-helix core domain of the mercury transport membrane protein MerF with a backbone RMSD of 0.58 A. Moreover, the fold of this polypeptide demonstrates that the two vicinal pairs of cysteine residues, shown to be involved in the transport of Hg(II) across the membrane, are exposed to the cytoplasm. This finding differs from earlier structural and mechanistic models that were based primarily on the somewhat atypical hydropathy plot for MerF and related transport proteins.

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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	46	Morganella morganii	Mutation(s): 0  Gene Names: merF
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Bacterial Mercury Detoxification Proteins	Protein:  MerF Hg(II) transporter
Find proteins for Q56446 (Morganella morganii) Explore Q56446  Go to UniProtKB:  Q56446

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 15 
• Selection Criteria: LEAST RESTRAINT VIOLATION 
• OLDERADO: 1WAZ Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-10-28 
• Released Date: 2005-04-11 
Deposition Author(s): Howell, S.C., Mesleh, M.F., Opella, S.J.

Revision History 

• Version 1.0: 2005-04-11
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-04-03
  Changes: Data collection, Other, Source and taxonomy