1AMT

Crystal structure of alamethicin at 1.5 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

A Voltage-Gated Ion Channel Model Inferred from the Crystal Structure of Alamethicin at 1.5-A Resolution.

Fox Jr, R.O.Richards, F.M.

(1982) Nature 300: 325


  • PubMed Abstract: 
  • The crystal structure of alamethicin in nonaqueous solvent has been determined, and refined at 1.5-A resolution. The molecular conformation of the three crystallographically independent molecules is largely alpha-helical with a bend in the helix axis ...

    The crystal structure of alamethicin in nonaqueous solvent has been determined, and refined at 1.5-A resolution. The molecular conformation of the three crystallographically independent molecules is largely alpha-helical with a bend in the helix axis at an internal proline residue. The helix structure is highly amphipathic as most of the solvent-accessible polar atoms lie on a narrow strip of surface parallel to the helix axis. Molecular models for the voltage-gated ion channel, with n-fold symmetry and based on the molecular conformations observed in the crystal, are characterized by strong surface complementarity, a hydrophilic interior and a hydrophobic exterior. The channel structures are stabilized by a hydrated annulus of hydrogen-bonded glutamine residues which produce the greatest restriction in the channel diameter.


    Related Citations: 
    • The Crystal Structure of Alamethicin at 1.5 Angstroms Resolution
      Fox, R.O.
      () Thesis, Yale --: --



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALAMETHICIN F30
A, B, C
21N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MOH
Query on MOH

Download SDF File 
Download CCD File 
A, B, C
METHANOL
C H4 O
OKKJLVBELUTLKV-UHFFFAOYSA-N
 Ligand Interaction
CCN
Query on CCN

Download SDF File 
Download CCD File 
A, B
ACETONITRILE
C2 H3 N
WEVYAHXRMPXWCK-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000163
Query on PRD_000163
A,B,CAlamethicinPeptaibol / Antibiotic

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 33.330α = 90.00
b = 29.620β = 120.40
c = 23.200γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1988-10-09
    Type: Initial release
  • Version 1.1: 2011-06-14
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-07-27
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary
  • Version 1.4: 2012-12-12
    Type: Other
  • Version 1.5: 2017-11-01
    Type: Derived calculations, Other