2H3U

Crystal structure of murine carnitine acetyltransferase in complex with carnitine and CoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 

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This is version 1.4 of the entry. See complete history


Literature

Crystal structures of murine carnitine acetyltransferase in ternary complexes with its substrates

Hsiao, Y.-S.Jogl, G.Tong, L.

(2006) J Biol Chem 281: 28480-28487

  • DOI: https://doi.org/10.1074/jbc.M602622200
  • Primary Citation of Related Structures:  
    2H3P, 2H3U, 2H3W

  • PubMed Abstract: 

    Carnitine acyltransferases catalyze the reversible exchange of acyl groups between coenzyme A (CoA) and carnitine. They have important roles in many cellular processes, especially the oxidation of long-chain fatty acids in the mitochondria for energy production, and are attractive targets for drug discovery against diabetes and obesity. To help define in molecular detail the catalytic mechanism of these enzymes, we report here the high resolution crystal structure of wild-type murine carnitine acetyltransferase (CrAT) in a ternary complex with its substrates acetyl-CoA and carnitine, and the structure of the S554A/M564G double mutant in a ternary complex with the substrates CoA and hexanoylcarnitine. Detailed analyses suggest that these structures may be good mimics for the Michaelis complexes for the forward and reverse reactions of the enzyme, representing the first time that such complexes of CrAT have been studied in molecular detail. The structural information provides significant new insights into the catalytic mechanism of CrAT and possibly carnitine acyltransferases in general.


  • Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, New York 10027, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
carnitine acetyltransferase
A, B
599Mus musculusMutation(s): 0 
Gene Names: Crat
Membrane Entity: Yes 
UniProt
Find proteins for P47934 (Mus musculus)
Explore P47934 
Go to UniProtKB:  P47934
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP47934
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 164.51α = 90
b = 89.74β = 128.96
c = 122.95γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SnBphasing
CNSrefinement
COMOphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-08-01
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references, Derived calculations