1OB4

Cephaibol A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.112 
  • R-Value Observed: 0.086 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal Structures of Cephaibols

Bunkoczi, G.Schiell, M.Vertesy, L.Sheldrick, G.M.

(2003) J Pept Sci 9: 745

  • DOI: https://doi.org/10.1002/psc.496
  • Primary Citation of Related Structures:  
    1OB4, 1OB6, 1OB7

  • PubMed Abstract: 

    The crystal structures of the peptaibol antibiotics cephaibol A, cephaibol B and cephaibol C have been determined at ca. 0.9 A resolution. All three adopt a helical conformation with a sharp bend (of about 55 degrees) at the central hydroxyproline. All isovalines were found to possess the D configuration, superposition of all four models (there are two independent molecules in the cephaibol B structure) shows that the N-terminal helix is rigid and the C-terminus is flexible. There are differences in the hydrogen bonding patterns for the three structures that crystallize in different space groups despite relatively similar unit cell dimensions, but only in the case of cephaibol C does the packing emulate the formation of a membrane channel believed to be important for their biological function.


  • Organizational Affiliation

    Lehrstuhl für Strukturchemie, Georg-August Universität, Tammannstr. 4, 37077 Göttingen, Germany.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CEPHAIBOL A17Emericellopsis tubakiiMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
EOH
Query on EOH

Download Ideal Coordinates CCD File 
B [auth A]ETHANOL
C2 H6 O
LFQSCWFLJHTTHZ-UHFFFAOYSA-N
Modified Residues  3 Unique
IDChains TypeFormula2D DiagramParent
AIB
Query on AIB
A
L-PEPTIDE LINKINGC4 H9 N O2ALA
HYP
Query on HYP
A
L-PEPTIDE LINKINGC5 H9 N O3PRO
PHL
Query on PHL
A
L-PEPTIDE LINKINGC9 H13 N OPHE
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.112 
  • R-Value Observed: 0.086 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.534α = 90
b = 37.787β = 90
c = 9.115γ = 90
Software Package:
Software NamePurpose
SHELXL-97refinement
SAINTdata reduction
SADABSdata scaling
SHELXDphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Structure summary, Version format compliance
  • Version 1.2: 2012-11-30
    Changes: Other
  • Version 1.3: 2018-05-30
    Changes: Data collection
  • Version 1.4: 2019-05-22
    Changes: Data collection, Derived calculations, Refinement description, Structure summary