1ZY6

Membrane-bound dimer structure of Protegrin-1 (PG-1), a beta-Hairpin Antimicrobial Peptide in Lipid Bilayers from Rotational-Echo Double-Resonance Solid-State NMR


Experimental Data Snapshot

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: least violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Membrane-Bound Dimer Structure of a beta-Hairpin Antimicrobial Peptide from Rotational-Echo Double-Resonance Solid-State NMR.

Mani, R.Tang, M.Wu, X.Buffy, J.J.Waring, A.J.Sherman, M.A.Hong, M.

(2006) Biochemistry 45: 8341-8349

  • DOI: 10.1021/bi060305b

  • PubMed Abstract: 
  • The intermolecular packing of a beta-hairpin antimicrobial peptide, PG-1, in lipid bilayers is determined using solid-state NMR distance measurements. Previous spin counting experiments showed that PG-1 associates as dimers in POPC bilayers; however, ...

    The intermolecular packing of a beta-hairpin antimicrobial peptide, PG-1, in lipid bilayers is determined using solid-state NMR distance measurements. Previous spin counting experiments showed that PG-1 associates as dimers in POPC bilayers; however, the detailed dimer structure was unknown. We have now measured several intermolecular 13C-19F, 1H-13C, and 15N-13C distances in site-specifically labeled PG-1 to constrain the structure of the intermolecular interface. The distances are measured using the rotational-echo double-resonance (REDOR) technique under magic-angle spinning. The results indicate that two PG-1 molecules align in a parallel fashion with the C-terminal strand of the hairpin forming the dimer interface. Six hydrogen bonds stabilize this interface, and the Phe12 side chain adopts the g- conformation in the membrane as in solution. The parallel packing of the peptide in the lipid bilayer differs from the antiparallel dimer found in DPC micelles and may be stabilized by its strong amphipathic character, which should facilitate its insertion into the amphipathic lipid bilayer. This study demonstrates the utility of the REDOR NMR technique for the elucidation of the oligomeric structure of membrane proteins.


    Organizational Affiliation

    Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protegrin 1
A, B
19Sus scrofaMutation(s): 0 
Gene Names: NPG1
Find proteins for P32194 (Sus scrofa)
Go to UniProtKB:  P32194
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: least violations 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-13
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance