Macromolecule Content

• Total Structure Weight: 573.66 
• Atom Count: 40 
• Residue Count: 5 
• Unique protein chains: 1

1PLX

NMR structure of Methionine-Enkephalin in fast tumbling Bicelles/DMPG

• DOI: 10.2210/pdb1PLX/pdb
• BMRB: 5914

• Classification: NEUROPEPTIDE
• Organism(s): Homo sapiens


• Deposited: 2003-06-09 Released: 2004-03-16 
• Deposition Author(s): Marcotte, I., Separovic, F., Auger, M., Gagne, S.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 80 
• Selection Criteria: structures with the lowest energy 

Literature

A multidimensional (1)h NMR investigation of the conformation of methionine-enkephalin in fast-tumbling bicelles.

Marcotte, I., Separovic, F., Auger, M., Gagne, S.M.

(2004) Biophys.J. 86: 1587-1600

• PubMed: 14990485 
• DOI: 10.1016/S0006-3495(04)74226-5
• Primary Citation of Related Structures:  
  1PLW


• PubMed Abstract: 
  

Enkephalins are pentapeptides found in the central nervous system. It is believed that these neuropeptides interact with the nerve cell membrane to adopt a conformation suitable for their binding to an opiate receptor. In this work, we have determined the three-dimensional structure of methionine-enkephalin (Menk) in fast-tumbling bicelles using multidimensional (1)H NMR. Bicelles were selected as model membranes because both their bilayer organization and composition resemble those of natural biomembranes. The effect of the membrane composition on the peptide conformation was explored using both zwitterionic (PC bicelles) and negatively charged bicelles (Bic/PG). Pulsed field gradient experiments allowed the determination of the proportion of Menk bound to the model membranes. Approximately 60% of the water-soluble enkephalin was found to associate to the bicellar systems. Structure calculations from torsion angle and NOE-based distance constraints suggest the presence of both micro - and delta-selective conformers of Menk in each system and slightly different conformers in PC bicelles and Bic/PG. As opposed to previous studies of enkephalins in membrane mimetic systems, our results show that these opiate peptides could adopt several conformations in a membrane environment, which is consistent with the flexibility and poor selectivity of enkephalins.

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Organizational Affiliation: 

Département de Chimie, Centre de Recherche en Sciences et Ingénierie des Macromolécules, Université Laval, Québec, Québec, Canada, G1K 7P4.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Met-enkephalin 1	A	5	Homo sapiens	Mutation(s): 0  Gene Names: PENK
Find proteins for P01210 (Homo sapiens) Go to Gene View: PENK Go to UniProtKB:  P01210

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 80 
• Selection Criteria: structures with the lowest energy 
• Olderado: 1PLX Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-09 
• Released Date: 2004-03-16 
• Deposition Author(s): Marcotte, I., Separovic, F., Auger, M., Gagne, S.M.

Revision History 

• Version 1.0: 2004-03-16
  Type: Initial release
• Version 1.1: 2008-04-29
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance