2AHU

Crystal structure of Acyl-CoA transferase (YdiF) apoenzyme from Escherichia coli O157:H7.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic trapping of the glutamyl-CoA thioester intermediate of family I CoA transferases.

Rangarajan, E.S.Li, Y.Ajamian, E.Iannuzzi, P.Kernaghan, S.D.Fraser, M.E.Cygler, M.Matte, A.

(2005) J.Biol.Chem. 280: 42919-42928

  • DOI: 10.1074/jbc.M510522200
  • Primary Citation of Related Structures:  2AHV, 2AHW

  • PubMed Abstract: 
  • Coenzyme A transferases are involved in a broad range of biochemical processes in both prokaryotes and eukaryotes, and exhibit a diverse range of substrate specificities. The YdiF protein from Escherichia coli O157:H7 is an acyl-CoA transferase of un ...

    Coenzyme A transferases are involved in a broad range of biochemical processes in both prokaryotes and eukaryotes, and exhibit a diverse range of substrate specificities. The YdiF protein from Escherichia coli O157:H7 is an acyl-CoA transferase of unknown physiological function, and belongs to a large sequence family of CoA transferases, present in bacteria to humans, which utilize oxoacids as acceptors. In vitro measurements showed that YdiF displays enzymatic activity with short-chain acyl-CoAs. The crystal structures of YdiF and its complex with CoA, the first co-crystal structure for any Family I CoA transferase, have been determined and refined at 1.9 and 2.0 A resolution, respectively. YdiF is organized into tetramers, with each monomer having an open alpha/beta structure characteristic of Family I CoA transferases. Co-crystallization of YdiF with a variety of CoA thioesters in the absence of acceptor carboxylic acid resulted in trapping a covalent gamma-glutamyl-CoA thioester intermediate. The CoA binds within a well defined pocket at the N- and C-terminal domain interface, but makes contact only with the C-terminal domain. The structure of the YdiF complex provides a basis for understanding the different catalytic steps in the reaction of Family I CoA transferases.


    Organizational Affiliation

    Department of Biochemistry, McGill University, Quebec, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
putative enzyme ydiF
A, B, C, D
531Escherichia coli O157:H7Gene Names: ydiF
EC: 2.8.3.8
Find proteins for Q8X5X6 (Escherichia coli O157:H7)
Go to UniProtKB:  Q8X5X6
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 81.129α = 90.00
b = 133.308β = 100.57
c = 105.838γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
HKL-2000data reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-01
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance