3V99

S663D Stable-5-LOX in complex with Arachidonic Acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.252 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conversion of human 5-lipoxygenase to a 15-lipoxygenase by a point mutation to mimic phosphorylation at Serine-663.

Gilbert, N.C.Rui, Z.Neau, D.B.Waight, M.T.Bartlett, S.G.Boeglin, W.E.Brash, A.R.Newcomer, M.E.

(2012) Faseb J. 26: 3222-3229

  • DOI: 10.1096/fj.12-205286
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The enzyme 5-lipoxygenase (5-LOX) initiates biosynthesis of the proinflammatory leukotriene lipid mediators and, together with 15-LOX, is also required for synthesis of the anti-inflammatory lipoxins. The catalytic activity of 5-LOX is regulated thro ...

    The enzyme 5-lipoxygenase (5-LOX) initiates biosynthesis of the proinflammatory leukotriene lipid mediators and, together with 15-LOX, is also required for synthesis of the anti-inflammatory lipoxins. The catalytic activity of 5-LOX is regulated through multiple mechanisms, including Ca(2+)-targeted membrane binding and phosphorylation at specific serine residues. To investigate the consequences of phosphorylation at S663, we mutated the residue to the phosphorylation mimic Asp, providing a homogenous preparation suitable for catalytic and structural studies. The S663D enzyme exhibits robust 15-LOX activity, as determined by spectrophotometric and HPLC analyses, with only traces of 5-LOX activity remaining; synthesis of the anti-inflammatory lipoxin A(4) from arachidonic acid is also detected. The crystal structure of the S663D mutant in the absence and presence of arachidonic acid (in the context of the previously reported Stable-5-LOX) reveals substantial remodeling of helices that define the active site so that the once fully encapsulated catalytic machinery is solvent accessible. Our results suggest that phosphorylation of 5-LOX at S663 could not only down-regulate leukotriene synthesis but also stimulate lipoxin production in inflammatory cells that do not express 15-LOX, thus redirecting lipid mediator biosynthesis to the production of proresolving mediators of inflammation.


    Organizational Affiliation

    Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Arachidonate 5-lipoxygenase
A, B
691Homo sapiensMutation(s): 10 
Gene Names: ALOX5 (LOG5)
EC: 1.13.11.34
Find proteins for P09917 (Homo sapiens)
Go to Gene View: ALOX5
Go to UniProtKB:  P09917
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACD
Query on ACD

Download SDF File 
Download CCD File 
A
ARACHIDONIC ACID
C20 H32 O2
YZXBAPSDXZZRGB-DOFZRALJSA-N
 Ligand Interaction
FE2
Query on FE2

Download SDF File 
Download CCD File 
A, B
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.252 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.186 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.755α = 90.00
b = 200.844β = 105.65
c = 72.184γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
xia2data scaling
xia2data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-02
    Type: Initial release
  • Version 1.1: 2012-08-15
    Type: Database references