4FA0

Crystal structure of human AdPLA to 2.65 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure/Function relationships of adipose phospholipase A2 containing a cys-his-his catalytic triad.

Pang, X.Y.Cao, J.Addington, L.Lovell, S.Battaile, K.P.Zhang, N.Rao, J.L.Dennis, E.A.Moise, A.R.

(2012) J.Biol.Chem. 287: 35260-35274

  • DOI: 10.1074/jbc.M112.398859

  • PubMed Abstract: 
  • Adipose phospholipase A(2) (AdPLA or Group XVI PLA(2)) plays an important role in the onset of obesity by suppressing adipose tissue lipolysis. As a consequence, AdPLA-deficient mice are resistant to obesity induced by a high fat diet or leptin defic ...

    Adipose phospholipase A(2) (AdPLA or Group XVI PLA(2)) plays an important role in the onset of obesity by suppressing adipose tissue lipolysis. As a consequence, AdPLA-deficient mice are resistant to obesity induced by a high fat diet or leptin deficiency. It has been proposed that AdPLA mediates its antilipolytic effects by catalyzing the release of arachidonic acid. Based on sequence homology, AdPLA is part of a small family of acyltransferases and phospholipases related to lecithin:retinol acyltransferase (LRAT). To better understand the enzymatic mechanism of AdPLA and LRAT-related proteins, we solved the crystal structure of AdPLA. Our model indicates that AdPLA bears structural similarity to proteins from the NlpC/P60 family of cysteine proteases, having its secondary structure elements configured in a circular permutation of the classic papain fold. Using both structural and biochemical evidence, we demonstrate that the enzymatic activity of AdPLA is mediated by a distinctive Cys-His-His catalytic triad and that the C-terminal transmembrane domain of AdPLA is required for the interfacial catalysis. Analysis of the enzymatic activity of AdPLA toward synthetic and natural substrates indicates that AdPLA displays PLA(1) in addition to PLA(2) activity. Thus, our results provide insight into the enzymatic mechanism and biochemical properties of AdPLA and LRAT-related proteins and lead us to propose an alternate mechanism for AdPLA in promoting adipose tissue lipolysis that is not contingent on the release of arachidonic acid and that is compatible with its combined PLA(1)/A(2) activity.


    Organizational Affiliation

    Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas 66045, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Group XVI phospholipase A1/A2
A
137Homo sapiensMutation(s): 0 
Gene Names: PLAAT3 (HRASLS3, HREV107, PLA2G16)
EC: 2.3.1.-, 3.1.1.32, 3.1.1.4
Find proteins for P53816 (Homo sapiens)
Go to UniProtKB:  P53816
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 59.991α = 90.00
b = 59.991β = 90.00
c = 74.006γ = 120.00
Software Package:
Software NamePurpose
BUSTERrefinement
Aimlessdata scaling
BUSTER-TNTrefinement
JDirectordata collection
PHASERphasing
PDB_EXTRACTdata extraction
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-06
    Type: Initial release
  • Version 1.1: 2012-09-05
    Type: Database references
  • Version 1.2: 2012-11-14
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description