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 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.227 

wwPDB Validation   3D Report Full Report


This is version 1.4 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: 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 ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
thermal hysteresis proteinA, B, C, D90Choristoneura fumiferanaMutation(s): 2 
UniProt
Find proteins for Q9GTP0 (Choristoneura fumiferana)
Explore Q9GTP0 
Go to UniProtKB:  Q9GTP0
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD

Download Ideal Coordinates CCD File 
E [auth D], F [auth D]CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TYI
Query on TYI
A, B, C, DL-PEPTIDE LINKINGC9 H9 I2 N O3TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.227 
  • 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

View Full Validation Report




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