5W7F

Murine acyloxyacyl hydrolase (AOAH), S262A mutant, with lipid A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.216 

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; bhushan.nagar@mcgill.ca.,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, H3G0B1, Canada.,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 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GCS
Query on GCS

Download SDF File 
Download CCD File 
B
D-GLUCOSAMINE
2-AMINO-2-DEOXY-D-GLUCOSE
C6 H13 N O5
MSWZFWKMSRAUBD-QZABAPFNSA-N
 Ligand Interaction
CA
Query on CA

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

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Download CCD File 
A, B
3-HYDROXY-TETRADECANOIC ACID
3-HYDROXY-MYRISTIC ACID
C14 H28 O3
ATRNZOYKSNPPBF-CYBMUJFWSA-N
 Ligand Interaction
DAO
Query on DAO

Download SDF File 
Download CCD File 
A, B
LAURIC ACID
C12 H24 O2
POULHZVOKOAJMA-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 81.797α = 90.00
b = 88.354β = 103.01
c = 93.450γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanadaMOP-133535

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