Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 15.83 kDa 
• Atom Count: 1163 
• Residue Count: 134 
• Unique protein chains: 1

4AZP

Murine epidermal fatty acid-binding protein (FABP5) in complex with the endocannabinoid anandamide

• DOI: 10.2210/pdb4AZP/pdb

• Classification: LIPID BINDING PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2012-06-26 Released: 2013-08-07 
• Deposition Author(s): Sanson, B., Wang, T., Sun, J., Kaczocha, M., Ojima, I., Deutsch, D., Li, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.236 
• R-Value Work: 0.199 
• R-Value Observed: 0.201 

Literature

Crystallographic Study of Fabp5 as an Intracellular Endocannabinoid Transporter.

Sanson, B., Wang, T., Sun, J., Wang, L., Kaczocha, M., Ojima, I., Deutsch, D., Li, H.

(2014) Acta Crystallogr D Biol Crystallogr 70: 290

• PubMed: 24531463 
• DOI: 10.1107/S1399004713026795
• Primary Citation of Related Structures:  
  4AZM, 4AZN, 4AZO, 4AZP, 4AZQ, 4AZR


• PubMed Abstract: 
  

In addition to binding intracellular fatty acids, fatty-acid-binding proteins (FABPs) have recently been reported to also transport the endocannabinoids anandamide (AEA) and 2-arachidonoylglycerol (2-AG), arachidonic acid derivatives that function as neurotransmitters and mediate a diverse set of physiological and psychological processes. To understand how the endocannabinoids bind to FABPs, the crystal structures of FABP5 in complex with AEA, 2-AG and the inhibitor BMS-309403 were determined. These ligands are shown to interact primarily with the substrate-binding pocket via hydrophobic interactions as well as a common hydrogen bond to the Tyr131 residue. This work advances our understanding of FABP5-endocannabinoid interactions and may be useful for future efforts in the development of small-molecule inhibitors to raise endocannabinoid levels.

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Organizational Affiliation: 

Biosciences Department, Brookhaven National Laboratory, Upton, NY 11973-5000, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FATTY ACID-BINDING PROTEIN, EPIDERMAL	A	138	Mus musculus	Mutation(s): 0  Gene Names: Fabp5, Fabpe, Klbp, Mal1
Find proteins for Q05816 (Mus musculus) Explore Q05816  Go to UniProtKB:  Q05816

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
A9M	A	N-(2-hydroxyethyl)icosanamide C22 H45 N O2 AUJVQJHODMISJP-UHFFFAOYSA-N
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
A9M	Ki :  1260   nM  PDBBind
A9M	Ki:  1260   nM  Binding MOAD

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.236 
• R-Value Work: 0.199 
• R-Value Observed: 0.201 
• Space Group: P 6₄ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.71	α = 90
b = 79.71	β = 90
c = 83.15	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-06-26 
• Released Date: 2013-08-07 
Deposition Author(s): Sanson, B., Wang, T., Sun, J., Kaczocha, M., Ojima, I., Deutsch, D., Li, H.

Revision History 

• Version 1.0: 2013-08-07
  Type: Initial release
  
• Version 1.1: 2014-02-12
  Changes: Database references
• Version 1.2: 2014-02-26
  Changes: Database references
• Version 1.3: 2019-01-30
  Changes: Data collection, Experimental preparation, Other
• Version 1.4: 2019-02-06
  Changes: Data collection, Experimental preparation