1NM8

Structure of Human Carnitine Acetyltransferase: Molecular Basis for Fatty Acyl Transfer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Human Carnitine Acetyltransferase. Molecular Basis for Fatty Acyl Transfer

Wu, D.Govindasamy, L.Lian, W.Gu, Y.Kukar, T.Agbandje-McKenna, M.McKenna, R.

(2003) J.Biol.Chem. 278: 13159-13165

  • DOI: 10.1074/jbc.M212356200

  • PubMed Abstract: 
  • Carnitine acyltransferases are a family of ubiquitous enzymes that play a pivotal role in cellular energy metabolism. We report here the x-ray structure of human carnitine acetyltransferase to a 1.6-A resolution. This structure reveals a monomeric pr ...

    Carnitine acyltransferases are a family of ubiquitous enzymes that play a pivotal role in cellular energy metabolism. We report here the x-ray structure of human carnitine acetyltransferase to a 1.6-A resolution. This structure reveals a monomeric protein of two equally sized alpha/beta domains. Each domain is shown to have a partially similar fold to other known but oligomeric enzymes that are also involved in group-transfer reactions. The unique monomeric arrangement of the two domains constitutes a central narrow active site tunnel, indicating a likely universal feature for all members of the carnitine acyltransferase family. Superimposition of the substrate complex of a related protein, dihydrolipoyl trans-acetylase, reveals that both substrates localize to the active site tunnel of human carnitine acetyltransferase, suggesting the location of the ligand binding sites for carnitine and coenzyme A. Most significantly, this structure provides critical insights into the molecular basis for fatty acyl chain transfer and a possible common mechanism among a wide range of acyltransferases utilizing a catalytic dyad.


    Organizational Affiliation

    Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carnitine O-acetyltransferase
A
616Homo sapiensMutation(s): 0 
Gene Names: CRAT (CAT1)
EC: 2.3.1.7
Find proteins for P43155 (Homo sapiens)
Go to Gene View: CRAT
Go to UniProtKB:  P43155
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 137.500α = 90.00
b = 84.500β = 90.00
c = 57.500γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSphasing
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance