Crystal structure of LUSH from Drosophila melanogaster: apo protein

Experimental Data Snapshot

  • Resolution: 1.86 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.193 

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The role of multiple hydrogen-bonding groups in specific alcohol binding sites in proteins: insights from structural studies of LUSH.

Thode, A.B.Kruse, S.W.Nix, J.C.Jones, D.N.

(2008) J Mol Biol 376: 1360-1376

  • DOI: https://doi.org/10.1016/j.jmb.2007.12.063
  • Primary Citation of Related Structures:  
    1T14, 3B6X, 3B7A, 3B86, 3B87, 3B88

  • PubMed Abstract: 

    It is now generally accepted that many of the physiological effects of alcohol consumption are a direct result of binding to specific sites in neuronal proteins such as ion channels or other components of neuronal signaling cascades. Binding to these targets generally occurs in water-filled pockets and leads to alterations in protein structure and dynamics. However, the precise interactions required to confer alcohol sensitivity to a particular protein remain undefined. Using information from the previously solved crystal structures of the Drosophila melanogaster protein LUSH in complexes with short-chain alcohols, we have designed and tested the effects of specific amino acid substitutions on alcohol binding. The effects of these substitutions, specifically S52A, T57S, and T57A, were examined using a combination of molecular dynamics, X-ray crystallography, fluorescence spectroscopy, and thermal unfolding. These studies reveal that the binding of ethanol is highly sensitive to small changes in the composition of the alcohol binding site. We find that T57 is the most critical residue for binding alcohols; the T57A substitution completely abolishes binding, while the T57S substitution differentially affects ethanol binding compared to longer-chain alcohols. The additional requirement for a potential hydrogen-bond acceptor at position 52 suggests that both the presence of multiple hydrogen-bonding groups and the identity of the hydrogen-bonding residues are critical for defining an ethanol binding site. These results provide new insights into the detailed chemistry of alcohol's interactions with proteins.

  • Organizational Affiliation

    Program in Biomolecular Structure, University of Colorado Denver School of Medicine, 12801 East 17th Avenue, MS 8303, PO Box 6511, Aurora, CO 80045, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
124Drosophila melanogasterMutation(s): 0 
Gene Names: lush
Find proteins for O02372 (Drosophila melanogaster)
Explore O02372 
Go to UniProtKB:  O02372
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO02372
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ACT

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C2 H3 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.86 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.193 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.935α = 90
b = 46.935β = 90
c = 111.356γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-04-26
    Type: Initial release
  • Version 1.1: 2008-01-17
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description