1L0S

Choristoneura fumiferana (spruce budworm) antifreeze protein isoform 337

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 
    0.264 (Depositor), 0.260 (DCC) 
  • R-Value Work: 
    0.223 (Depositor), 0.220 (DCC) 
  • R-Value Observed: 
    0.227 (Depositor) 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history. 


Literature

Crystal structure of beta-helical antifreeze protein points to a general ice binding model.

Leinala, E.K., Davies, P.L., Jia, Z.

(2002) Structure 10: 619-627

  • DOI: https://doi.org/10.1016/s0969-2126(02)00745-1
  • Primary Citation of Related Structures:  
    1L0S

  • PubMed Abstract: 

    Reported here is the 2.3 A resolution crystal structure of spruce budworm (Choristoneura fumiferana) antifreeze protein (CfAFP), solved by single anomalous scattering. The structure reveals an extremely regular left-handed beta-helical platform consisting of 15-amino acid loops with a repetitive Thr-X-Thr motif displayed on one of the helix's three faces. This motif results in a two-dimensional array of threonine residues in an identical orientation to those in the nonhomologous, right-handed beta-helical beetle AFP from Tenebrio molitor (TmAFP). The CfAFP structure led us to reevaluate our ice binding model, and the analysis of three possible modes of docking gives rise to a binding mechanism based on surface complementarity. This general mechanism is applicable to both fish and insect AFPs.

    • Organizational Affiliation: 

    Department of Biochemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.


Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
thermal hysteresis protein
A, B, C, D
90Choristoneura fumiferanaMutation(s): 2 
UniProt
Find proteins for Q9GTP0 (Choristoneura fumiferana)
Explore Q9GTP0 
Go to UniProtKB:  Q9GTP0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9GTP0
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TYI
Query on TYI
A, B, C, D
L-PEPTIDE LINKINGC9 H9 I2 N O3TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free:  0.264 (Depositor), 0.260 (DCC) 
  • R-Value Work:  0.223 (Depositor), 0.220 (DCC) 
  • R-Value Observed: 0.227 (Depositor) 
Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.4α = 90
b = 128.4β = 90
c = 68.32γ = 120
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

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View more in-depth experimental data
Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-19
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.5: 2024-11-20
    Changes: Data collection, Structure summary