1C4D

GRAMICIDIN CSCL COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

The Gramicidin Pore: Crystal Structure of a Cesium Complex.

Wallace, B.A.Ravikumar, K.

(1988) Science 241: 182


  • PubMed Abstract: 
  • Gramicidin, a linear polypeptide composed of hydrophobic amino acids with alternating L- and D- configurations, forms transmembrane ion channels. The crystal structure of a gramicidin-cesium complex has been determined at 2.0 angstrom resolution. In ...

    Gramicidin, a linear polypeptide composed of hydrophobic amino acids with alternating L- and D- configurations, forms transmembrane ion channels. The crystal structure of a gramicidin-cesium complex has been determined at 2.0 angstrom resolution. In this structure, gramicidin forms a 26 angstrom long tube comprised of two polypeptide chains arranged as antiparallel beta strands that are wrapped into a left-handed helical coil with 6.4 residues per turn. The polypeptide backbone forms the interior of the hydrophilic, solvent-filled pore and the side chains form a hydrophobic and relatively regular surface on the outside of the pore. This example of a crystal structure of a solvent-filled ion pore provides a basis for understanding the physical nature of ion translocation.


    Related Citations: 
    • The Use of Single-Wavelength Anomalous Scattering to Solve the Crystal Structure of a Gramicidin A/ Caesium Chloride Complex
      Wallace, B.A.,Hendrickson, W.A.,Ravikumar, K.
      (1990) Acta Crystallogr., Sect.B B46: 440


    Organizational Affiliation

    Department of Chemistry and Center for Biophysics, Rensselaer Polytechnic Institute, Troy, NY 12180.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GRAMICIDIN A
A, B, C, D
16N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B, C, D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MOH
Query on MOH

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

Download SDF File 
Download CCD File 
A, B, C, D
CESIUM ION
Cs
NCMHKCKGHRPLCM-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000150
Query on PRD_000150
A,B,C,DGRAMICIDIN APolypeptide / Antibiotic

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 32.118α = 90.00
b = 52.103β = 90.00
c = 31.174γ = 90.00
Software Package:
Software NamePurpose
SCALE3data scaling
ANOSCLdata scaling
SCALE2data scaling
ASCALCmodel building
PHASITphasing
PHASITmodel building
HANSONdata reduction
ASCALCphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1999-06-04 
  • Released Date: 2000-01-03 
  • Deposition Author(s): Wallace, B.A.

Revision History 

  • Version 1.0: 2000-01-03
    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: 2017-10-04
    Type: Refinement description