4QGK

Structure of the Human Sjogren Larsson Syndrome enzyme fatty aldehyde dehydrogenase (FALDH)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A gatekeeper helix determines the substrate specificity of Sjogren-Larsson Syndrome enzyme fatty aldehyde dehydrogenase.

Keller, M.A.Zander, U.Fuchs, J.E.Kreutz, C.Watschinger, K.Mueller, T.Golderer, G.Liedl, K.R.Ralser, M.Krautler, B.Werner, E.R.Marquez, J.A.

(2014) Nat Commun 5: 4439-4439

  • DOI: 10.1038/ncomms5439

  • PubMed Abstract: 
  • Mutations in the gene coding for membrane-bound fatty aldehyde dehydrogenase (FALDH) lead to toxic accumulation of lipid species and development of the Sjögren-Larsson Syndrome (SLS), a rare disorder characterized by skin defects and mental retardati ...

    Mutations in the gene coding for membrane-bound fatty aldehyde dehydrogenase (FALDH) lead to toxic accumulation of lipid species and development of the Sjögren-Larsson Syndrome (SLS), a rare disorder characterized by skin defects and mental retardation. Here, we present the crystallographic structure of human FALDH, the first model of a membrane-associated aldehyde dehydrogenase. The dimeric FALDH displays a previously unrecognized element in its C-terminal region, a 'gatekeeper' helix, which extends over the adjacent subunit, controlling the access to the substrate cavity and helping orientate both substrate cavities towards the membrane surface for efficient substrate transit between membranes and catalytic site. Activity assays demonstrate that the gatekeeper helix is important for directing the substrate specificity of FALDH towards long-chain fatty aldehydes. The gatekeeper feature is conserved across membrane-associated aldehyde dehydrogenases. Finally, we provide insight into the previously elusive molecular basis of SLS-causing mutations.


    Organizational Affiliation

    1] Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innrain 80-82, 6020 Innsbruck, Austria [2] Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, 80 Tennis court Rd, Cambridge CB2 1GA, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fatty aldehyde dehydrogenase
A, B
461Homo sapiensMutation(s): 0 
Gene Names: ALDH3A2 (ALDH10, FALDH)
EC: 1.2.1.3, 1.2.1.94
Find proteins for P51648 (Homo sapiens)
Go to Gene View: ALDH3A2
Go to UniProtKB:  P51648
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 80.137α = 90.00
b = 98.582β = 90.00
c = 145.703γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
ADSCdata collection
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-30
    Type: Initial release
  • Version 1.1: 2018-02-07
    Type: Database references, Experimental preparation