Crystal structure of the LFZ ectodomain of the peptidoglycan recognition protein LF

Experimental Data Snapshot

  • Resolution: 1.72 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


The Drosophila Peptidoglycan-Recognition Protein Lf Interacts with Peptidoglycan-Recognition Protein Lc to Downregulate the Imd Pathway.

Basbous, N.Coste, F.Leone, P.Vincentelli, R.Royet, J.Kellenberger, C.Roussel, A.

(2011) EMBO Rep 12: 327

  • DOI: https://doi.org/10.1038/embor.2011.19
  • Primary Citation of Related Structures:  
    2XZ4, 2XZ8

  • PubMed Abstract: 

    The peptidoglycan (PGN)-recognition protein LF (PGRP-LF) is a specific negative regulator of the immune deficiency (Imd) pathway in Drosophila. We determine the crystal structure of the two PGRP domains constituting the ectodomain of PGRP-LF at 1.72 and 1.94 Å resolution. The structures show that the LFz and LFw domains do not have a PGN-docking groove that is found in other PGRP domains, and they cannot directly interact with PGN, as confirmed by biochemical-binding assays. By using surface plasmon resonance analysis, we show that the PGRP-LF ectodomain interacts with the PGRP-LCx ectodomain in the absence and presence of tracheal cytotoxin. Our results suggest a mechanism for downregulation of the Imd pathway on the basis of the competition between PRGP-LCa and PGRP-LF to bind to PGRP-LCx.

  • Organizational Affiliation

    Centre de Biophysique Moléculaire, UPR 4301 CNRS, Rue Charles Sadron, Orléans 2 45071, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
180Drosophila melanogasterMutation(s): 0 
Find proteins for Q8SXQ7 (Drosophila melanogaster)
Explore Q8SXQ7 
Go to UniProtKB:  Q8SXQ7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8SXQ7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.72 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.166 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.802α = 90
b = 113.443β = 90
c = 37.532γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description