3B7W

Crystal structure of human acyl-CoA synthetase medium-chain family member 2A, with L64P mutation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural snapshots for the conformation-dependent catalysis by human medium-chain acyl-coenzyme A synthetase ACSM2A.

Kochan, G.Pilka, E.S.von Delft, F.Oppermann, U.Yue, W.W.

(2009) J.Mol.Biol. 388: 997-1008

  • DOI: 10.1016/j.jmb.2009.03.064
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Acyl-CoA synthetases belong to the superfamily of adenylate-forming enzymes, and catalyze the two-step activation of fatty acids or carboxylate-containing xenobiotics. The carboxylate substrate first reacts with ATP to form an acyl-adenylate intermed ...

    Acyl-CoA synthetases belong to the superfamily of adenylate-forming enzymes, and catalyze the two-step activation of fatty acids or carboxylate-containing xenobiotics. The carboxylate substrate first reacts with ATP to form an acyl-adenylate intermediate, which then reacts with CoA to produce an acyl-CoA ester. Here, we report the first crystal structure of a medium-chain acyl-CoA synthetase ACSM2A, in a series of substrate/product/cofactor complexes central to the catalytic mechanism. We observed a substantial rearrangement between the N- and C-terminal domains, driven purely by the identity of the bound ligand in the active site. Our structures allowed us to identify the presence or absence of the ATP pyrophosphates as the conformational switch, and elucidated new mechanistic details, including the role of invariant Lys557 and a divalent magnesium ion in coordinating the ATP pyrophosphates, as well as the involvement of a Gly-rich P-loop and the conserved Arg472-Glu365 salt bridge in the domain rearrangement.


    Organizational Affiliation

    Structural Genomics Consortium, Old Road Research Campus Building, Oxford, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acyl-coenzyme A synthetase ACSM2A, mitochondrial precursor
A
570Homo sapiensMutation(s): 1 
Gene Names: ACSM2A (ACSM2, MACS2)
EC: 6.2.1.2
Find proteins for Q08AH3 (Homo sapiens)
Go to Gene View: ACSM2A
Go to UniProtKB:  Q08AH3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.169 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 98.426α = 90.00
b = 109.173β = 90.00
c = 176.926γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
CrystalCleardata collection
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2018-01-31
    Type: Structure summary