Crystal Structure Analysis of rat enoyl-CoA hydratase in complex with hexadienoyl-CoA

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.175 

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Stereoselectivity of Enoyl-CoA Hydratase Results from Preferential Activation of One of Two Bound Substrate Conformers

Bell, A.F.Feng, Y.Hofstein, H.A.Parikh, S.Wu, J.Rudolph, M.J.Kisker, C.Whitty, A.Tonge, P.J.

(2002) Chem Biol 9: 1247-1255

  • DOI: https://doi.org/10.1016/s1074-5521(02)00263-6
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Enoyl-CoA hydratase catalyzes the hydration of trans-2-crotonyl-CoA to 3(S)- and 3(R)-hydroxybutyryl-CoA with a stereoselectivity (3(S)/3(R)) of 400,000 to 1. Importantly, Raman spectroscopy reveals that both the s-cis and s-trans conformers of the substrate analog hexadienoyl-CoA are bound to the enzyme, but that only the s-cis conformer is polarized. This selective polarization is an example of ground state strain, indicating the existence of catalytically relevant ground state destabilization arising from the selective complementarity of the enzyme toward the transition state rather than the ground state. Consequently, the stereoselectivity of the enzyme-catalyzed reaction results from the selective activation of one of two bound substrate conformers rather than from selective binding of a single conformer. These findings have important implications for inhibitor design and the role of ground state interactions in enzyme catalysis.

  • Organizational Affiliation

    Department of Chemistry, Center for Structural Biology, SUNY at Stony Brook, Stony Brook, NY 11794, USA.

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F
260Rattus norvegicusMutation(s): 0 
Find proteins for P14604 (Rattus norvegicus)
Explore P14604 
Go to UniProtKB:  P14604
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14604
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.877α = 90
b = 95.198β = 90
c = 249.429γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
FFTmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-24
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations