4LKP

Crystal Structure of Apo Human Epidermal Fatty Acid Binding Protein (FABP5)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for ligand regulation of the fatty acid-binding protein 5, peroxisome proliferator-activated receptor beta / delta (FABP5-PPAR beta / delta ) signaling pathway.

Armstrong, E.H.Goswami, D.Griffin, P.R.Noy, N.Ortlund, E.A.

(2014) J Biol Chem 289: 14941-14954

  • DOI: https://doi.org/10.1074/jbc.M113.514646
  • Primary Citation of Related Structures:  
    4LKP, 4LKT

  • PubMed Abstract: 

    Fatty acid-binding proteins (FABPs) are a widely expressed group of calycins that play a well established role in solubilizing cellular fatty acids. Recent studies, however, have recast FABPs as active participants in vital lipid-signaling pathways. FABP5, like its family members, displays a promiscuous ligand binding profile, capable of interacting with numerous long chain fatty acids of varying degrees of saturation. Certain "activating" fatty acids induce the protein's cytoplasmic to nuclear translocation, stimulating PPARβ/δ transactivation; however, the rules that govern this process remain unknown. Using a range of structural and biochemical techniques, we show that both linoleic and arachidonic acid elicit FABP5's translocation by permitting allosteric communication between the ligand-sensing β2 loop and a tertiary nuclear localization signal within the α-helical cap of the protein. Furthermore, we show that more saturated, nonactivating fatty acids inhibit nuclear localization signal formation by destabilizing this activation loop, thus implicating FABP5 specifically in cis-bonded, polyunsaturated fatty acid signaling.


  • Organizational Affiliation

    From the Department of Biochemistry, Discovery and Developmental Therapeutics, Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fatty acid-binding protein, epidermal138Homo sapiensMutation(s): 0 
Gene Names: FABP5
UniProt & NIH Common Fund Data Resources
Find proteins for Q01469 (Homo sapiens)
Explore Q01469 
Go to UniProtKB:  Q01469
PHAROS:  Q01469
GTEx:  ENSG00000164687 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ01469
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.971α = 90
b = 62.971β = 90
c = 74.498γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-03-26
    Type: Initial release
  • Version 1.1: 2016-04-13
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description
  • Version 1.3: 2024-10-16
    Changes: Data collection, Database references, Derived calculations, Structure summary