1AMT

Crystal structure of alamethicin at 1.5 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Observed: 0.155 

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

  • DOI: 10.1038/300325a0
  • Structures With Same Primary Citation

  • 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 --: --

    Organizational Affiliation

    Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Howard Hughes Medical Institute, St. Jude Children's Research Hospital, Memphis, TN 38105, USA. Electronic address: brenda.schulman@stjude.org.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALAMETHICIN F30
A, B, C
21Trichoderma virideMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CCN
Query on CCN

Download CCD File 
A, B
ACETONITRILE
C2 H3 N
WEVYAHXRMPXWCK-UHFFFAOYSA-N
 Ligand Interaction
MOH
Query on MOH

Download CCD File 
A, B, C
METHANOL
C H4 O
OKKJLVBELUTLKV-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000163
Query on PRD_000163
A, B, CAlamethicinPeptaibol /  Antibiotic

--

Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
AIB
Query on AIB
A,B,CL-PEPTIDE LINKINGC4 H9 N O2ALA
PHL
Query on PHL
A,B,CL-PEPTIDE LINKINGC9 H13 N OPHE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Observed: 0.155 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.33α = 90
b = 29.62β = 120.4
c = 23.2γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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