5W7E

Murine acyloxyacyl hydrolase (AOAH), S262A mutant, with dimyristoyl phosphatidylcholine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.157 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of the mammalian lipopolysaccharide detoxifier.

Gorelik, A.Illes, K.Nagar, B.

(2018) Proc. Natl. Acad. Sci. U.S.A. 115: E896-E905

  • DOI: 10.1073/pnas.1719834115
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • LPS is a potent bacterial endotoxin that triggers the innate immune system. Proper recognition of LPS by pattern-recognition receptors requires a full complement of typically six acyl chains in the lipid portion. Acyloxyacyl hydrolase (AOAH) is a hos ...

    LPS is a potent bacterial endotoxin that triggers the innate immune system. Proper recognition of LPS by pattern-recognition receptors requires a full complement of typically six acyl chains in the lipid portion. Acyloxyacyl hydrolase (AOAH) is a host enzyme that removes secondary (acyloxyacyl-linked) fatty acids from LPS, rendering it immunologically inert. This activity is critical for recovery from immune tolerance that follows Gram-negative infection. To understand the molecular mechanism of AOAH function, we determined its crystal structure and its complex with LPS. The substrate's lipid moiety is accommodated in a large hydrophobic pocket formed by the saposin and catalytic domains with a secondary acyl chain inserted into a narrow lateral hydrophobic tunnel at the active site. The enzyme establishes dispensable contacts with the phosphate groups of LPS but does not interact with its oligosaccharide portion. Proteolytic processing allows movement of an amphipathic helix possibly involved in substrate access at membranes.


    Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, H3G0B1, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acyloxyacyl hydrolase
A, B
562Mus musculusMutation(s): 1 
Gene Names: Aoah
EC: 3.1.1.77
Find proteins for O35298 (Mus musculus)
Go to UniProtKB:  O35298
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
FAW
Query on FAW

Download SDF File 
Download CCD File 
A, B
(2S)-3-hydroxypropane-1,2-diyl ditetradecanoate
C31 H60 O5
JFBCSFJKETUREV-LJAQVGFWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.157 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 81.425α = 90.00
b = 85.373β = 103.64
c = 93.398γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data scaling
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanadaMOP-113535

Revision History 

  • Version 1.0: 2018-01-03
    Type: Initial release
  • Version 1.1: 2018-01-17
    Type: Database references
  • Version 1.2: 2018-01-31
    Type: Database references
  • Version 1.3: 2018-02-14
    Type: Database references