1LBJ

NMR solution structure of motilin in phospholipid bicellar solution


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 24 
  • Selection Criteria: structures with the least restraint violations,structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR solution structure and dynamics of motilin in isotropic phospholipid bicellar solution

Andersson, A.Maler, L.

(2002) J.BIOMOL.NMR 24: 103-112


  • PubMed Abstract: 
  • The structure and dynamics of the gastrointestinal peptide hormone motilin, consisting of 22 amino acid residues, have been studied in the presence of isotropic q = 0.5 phospholipid bicelles. The NMR solution structure of the peptide in acidic bicell ...

    The structure and dynamics of the gastrointestinal peptide hormone motilin, consisting of 22 amino acid residues, have been studied in the presence of isotropic q = 0.5 phospholipid bicelles. The NMR solution structure of the peptide in acidic bicelle solution was determined from 203 NOE-derived distance constraints and six backbone torsion angle constraints. Dynamic properties for the 13Calpha-1H vector in Leu10 were determined for motilin specifically labeled with 13C at this position by analysis of multiple-field relaxation data. The structure reveals an ordered alpha-helical conformation between Glu9 and Lys20. The N-terminus is also well structured with a turn resembling that of a classical beta-turn. The 13C dynamics clearly show that motilin tumbles slowly in solution, with a correlation time characteristic of a large object. It was also found that motilin has a large degree of local flexibility as compared with what has previously been reported in SDS micelles. The results show that motilin interacts with the bicelle, displaying motional properties of a peptide bound to a membrane. In comparison, motilin in neutral bicelles seems less structured and more flexible. This study shows that the small isotropic bicelles are well suited for use as membrane-mimetic for structural as well as dynamical investigations of membrane-bound peptides by high-resolution NMR.


    Related Citations: 
    • Three-dimensional structure and position of porcine motilin in sodium dodecyl sulfate micelles determined by 1H NMR
      Jarvet, J.,Zdunek, J.,Damberg, P.,Graslund, A.
      (1997) Biochemistry 36: 8153


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Arrhenius Laboratory, Stockholm University, 10691 Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
motilin
A
22Homo sapiensMutation(s): 0 
Gene Names: MLN
Find proteins for P12872 (Homo sapiens)
Go to Gene View: MLN
Go to UniProtKB:  P12872
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 24 
  • Selection Criteria: structures with the least restraint violations,structures with the lowest energy 
  • Olderado: 1LBJ Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-20
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance