Crystal Structure and Functional Analysis of Drosophila Wind-- a PDI-Related Protein

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 

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Crystal structure and functional analysis of Drosophila Wind, a protein-disulfide isomerase-related protein.

Ma, Q.Guo, C.Barnewitz, K.Sheldrick, G.M.Soling, H.D.Uson, I.Ferrari, D.M.

(2003) J Biol Chem 278: 44600-44607

  • DOI: https://doi.org/10.1074/jbc.M307966200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In the developing Drosophila melanogaster embryo, dorsal-ventral patterning displays an absolute requirement for the product of the essential windbeutel gene, Wind. In homozygous windbeutel mutant flies, dorsal-ventral patterning fails to initiate because of the failure of the Golgi-resident proteoglycan-modifying protein, Pipe, to exit the endoplasmic reticulum, and this leads to the death of the embryo. Here, we describe the three-dimensional structure of Wind at 1.9-A resolution and identify a candidate surface for interaction with Pipe. This represents the first crystal structure of a eukaryotic protein-disulfide isomerase-related protein of the endoplasmic reticulum to be described. The dimeric protein is composed of an N-terminal thioredoxin domain and a C-terminal alpha-helical domain unique to protein-disulfide isomerase D proteins. Although Wind carries a CXXC motif that is partially surface accessible, this motif is redox inactive, and the cysteines are not required for the targeting of Pipe to the Golgi. However, both domains are required for targeting Pipe to the Golgi, and, although the mouse homologue ERp28 cannot replace the function of Wind, exchange of the Wind D-domain with that of ERp28 allows for efficient Golgi transport of Pipe.

  • Organizational Affiliation

    Department of Structural Chemistry, University of Göttingen, Tammanstrasse 4, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
248Drosophila melanogasterMutation(s): 0 
Gene Names: Wind
Find proteins for O44342 (Drosophila melanogaster)
Explore O44342 
Go to UniProtKB:  O44342
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO44342
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on CS

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.678α = 90
b = 50.358β = 112.84
c = 98.616γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling
XPREPdata reduction
CCP4data scaling
SHELXEmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-02-24
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description