1WFA

WINTER FLOUNDER ANTIFREEZE PROTEIN ISOFORM HPLC6 AT 4 DEGREES C


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.179 

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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ANTIFREEZE PROTEIN ISOFORM HPLC6
A, B
38Pseudopleuronectes americanusMutation(s): 0 
Find proteins for P04002 (Pseudopleuronectes americanus)
Go to UniProtKB:  P04002
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B
NON-POLYMERH2 N

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.179 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 38.170α = 90.00
b = 37.040β = 101.14
c = 21.890γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
RIGAKUdata reduction
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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