1OOZ

Deletion mutant of SUCCINYL-COA:3-KETOACID COA TRANSFERASE FROM PIG HEART


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structure of the CoA transferase from pig heart to 1.7 A resolution.

Coros, A.M.Swenson, L.Wolodko, W.T.Fraser, M.E.

(2004) Acta Crystallogr D Biol Crystallogr 60: 1717-1725

  • DOI: https://doi.org/10.1107/S0907444904017974
  • Primary Citation of Related Structures:  
    1OOY, 1OOZ, 1OPE

  • PubMed Abstract: 

    Succinyl-CoA:3-ketoacid CoA transferase (SCOT; EC 2.8.3.5) activates the acetoacetate in ketone bodies by transferring the CoA group from succinyl-CoA to acetoacetate to produce acetoacetyl-CoA and succinate. In the reaction, a glutamate residue at the active site of the enzyme forms a thioester bond with CoA and in this form the enzyme is subject to autolytic fragmentation. The crystal structure of pig heart SCOT has been solved and refined to 1.7 A resolution in a new crystal form. The structure shows the active-site glutamate residue in a conformation poised for autolytic fragmentation, with its side chain accepting one hydrogen bond from Asn281 and another from its own amide N atom. However, the conformation of this glutamate side chain would have to change for the residues that are conserved in the CoA transferases (Gln99, Gly386 and Ala387) to participate in stabilizing the tetrahedral transition states of the catalytic mechanism. The structures of a deletion mutant in two different crystal forms were also solved.


  • Organizational Affiliation

    Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Succinyl-CoA:3-ketoacid-coenzyme A transferase
A, B
475Sus scrofaMutation(s): 0 
Gene Names: OXCT OR SCOT
EC: 2.8.3.5
UniProt
Find proteins for Q29551 (Sus scrofa)
Explore Q29551 
Go to UniProtKB:  Q29551
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ29551
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.819α = 90
b = 139.112β = 90
c = 68.476γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-27
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description