Dynamic domains of Succinyl-CoA:3-ketoacid-coenzyme A transferase from pig heart.

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 

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This is version 1.3 of the entry. See complete history


The high-resolution structure of pig heart succinyl-CoA:3-oxoacid coenzyme A transferase.

Coker, S.F.Lloyd, A.J.Mitchell, E.Lewis, G.R.Coker, A.R.Shoolingin-Jordan, P.M.

(2010) Acta Crystallogr D Biol Crystallogr 66: 797-805

  • DOI: https://doi.org/10.1107/S0907444910018366
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The enzyme succinyl-CoA:3-oxoacid coenzyme A transferase (SCOT) participates in the metabolism of ketone bodies in extrahepatic tissues. It catalyses the transfer of coenzyme A (CoA) from succinyl-CoA to acetoacetate with a classical ping-pong mechanism. There is biochemical evidence that the enzyme undergoes conformational changes during the reaction, but no domain movements have been reported in the available crystal structures. Here, a structure of pig heart SCOT refined at 1.5 A resolution is presented, showing that one of the four enzyme subunits in the crystallographic asymmetric unit has a molecule of glycerol bound in the active site; the glycerol molecule is hydrogen bonded to the conserved catalytic glutamate residue and is likely to occupy the cosubstrate-binding site. The binding of glycerol is associated with a substantial relative movement (a 13 degrees rotation) of two previously undefined domains that close around the substrate-binding site. The binding orientation of one of the cosubstrates, acetoacetate, is suggested based on the glycerol binding and the possibility that this dynamic domain movement is of functional importance is discussed.

  • Organizational Affiliation

    Center for Amyloidosis and Acute Phase Proteins, Division of Medicine (Royal Free Campus), University College London, London, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Succinyl-CoA:3-ketoacid-coenzyme A transferase 1, mitochondrialA,
B [auth D],
D [auth B]
481Sus scrofaMutation(s): 0 
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
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.715α = 90
b = 133.566β = 104.98
c = 102.23γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2012-03-21
    Changes: Database references
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description