1EWW

SOLUTION STRUCTURE OF SPRUCE BUDWORM ANTIFREEZE PROTEIN AT 30 DEGREES CELSIUS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Beta-helix structure and ice-binding properties of a hyperactive antifreeze protein from an insect.

Graether, S.P.Kuiper, M.J.Gagne, S.M.Walker, V.K.Jia, Z.Sykes, B.D.Davies, P.L.

(2000) Nature 406: 325-328

  • DOI: 10.1038/35018610
  • Primary Citation of Related Structures:  
    1EWW

  • PubMed Abstract: 
  • Insect antifreeze proteins (AFP) are considerably more active at inhibiting ice crystal growth than AFP from fish or plants. Several insect AFPs, also known as thermal hysteresis proteins, have been cloned and expressed. Their maximum activity is 3-4 times that of fish AFPs and they are 10-100 times more effective at micromolar concentrations ...

    Insect antifreeze proteins (AFP) are considerably more active at inhibiting ice crystal growth than AFP from fish or plants. Several insect AFPs, also known as thermal hysteresis proteins, have been cloned and expressed. Their maximum activity is 3-4 times that of fish AFPs and they are 10-100 times more effective at micromolar concentrations. Here we report the solution structure of spruce budworm (Choristoneura fumiferana) AFP and characterize its ice-binding properties. The 9-kDa AFP is a beta-helix with a triangular cross-section and rectangular sides that form stacked parallel beta-sheets; a fold which is distinct from the three known fish AFP structures. The ice-binding side contains 9 of the 14 surface-accessible threonines organized in a regular array of TXT motifs that match the ice lattice on both prism and basal planes. In support of this model, ice crystal morphology and ice-etching experiments are consistent with AFP binding to both of these planes and thus may explain the greater activity of the spruce budworm antifreeze.


    Related Citations: 
    • The Antifreeze Potential of the Spruce Budworm Thermal Hysteresis Protein.
      Tyshenko, M.G., Doucet, D., Davies, P.L., Walker, V.K.
      (1997) Nat Biotechnol 15: 887

    Organizational Affiliation

    Department of Biochemistry, Queen's University, Kingston, Ontario, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ANTIFREEZE PROTEINA90Choristoneura fumiferanaMutation(s): 0 
UniProt
Find proteins for Q9GTP0 (Choristoneura fumiferana)
Explore Q9GTP0 
Go to UniProtKB:  Q9GTP0
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1EWW Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-07-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance