1WFB

WINTER FLOUNDER ANTIFREEZE PROTEIN ISOFORM HPLC6 AT-180 DEGREES C


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Ice-binding structure and mechanism of an antifreeze protein from winter flounder.

Sicheri, F.Yang, D.S.

(1995) Nature 375: 427-431

  • DOI: 10.1038/375427a0
  • Primary Citation of Related Structures:  
    1WFB, 1WFA

  • PubMed Abstract: 
  • Antifreeze proteins provide fish with protection against the freezing effect of polar environments by binding to ice surfaces and inhibiting growth of ice crystals. We present the X-ray crystal structure at 1.5 A resolution of a lone alpha-helical an ...

    Antifreeze proteins provide fish with protection against the freezing effect of polar environments by binding to ice surfaces and inhibiting growth of ice crystals. We present the X-ray crystal structure at 1.5 A resolution of a lone alpha-helical antifreeze protein from winter flounder, which provides a detailed look at its ice-binding features. These consist of four repeated ice-binding motifs, the side chains of which are inherently rigid or restrained by pair-wise side-chain interactions to form a flat binding surface. Elaborate amino- and carboxy-terminal cap structures are also present, which explain the protein's rich alpha-helical content in solution. We propose an ice-binding model that accounts for the binding specificity of the antifreeze protein along the <0112> axes of the (2021) ice planes.


    Related Citations: 
    • Structure Determination of an Antifreeze Protein from Winter Flounder
      Sicheri, F., Yang, D.S.C.
      () To be published --: --

    Organizational Affiliation

    Department of Biochemistry, Faculty of Health Science, McMaster University, Hamilton, Ontario, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ANTIFREEZE PROTEIN ISOFORM HPLC6AB38Pseudopleuronectes americanusMutation(s): 0 
Find proteins for P04002 (Pseudopleuronectes americanus)
Explore P04002 
Go to UniProtKB:  P04002
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.409α = 90
b = 36.543β = 103.36
c = 21.36γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
RIGAKUdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-06-03
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance