Journal of Computer-Aided Molecular Design

, Volume 4, Issue 2, pp 199–204 | Cite as

Solvation of the active site of cytochrome P450-cam

  • Rebecca C. Wade
Short Communications

Summary

Energetically favorable water binding sites in the substrate pocket of cytochrome P450-cam have been predicted by a molecular mechanics method. Binding sites corresponding to all the experimentally observed water sites in this region of the enzyme were located. The calculations also indicate the presence of two further water binding sites. One of these is located in a hydrophobic region of the protein where a water molecule would not bind tightly to the substrate-free enzyme. However, in the substrate-bound enzyme, a water molecule in this region could donate a hydrogen bond of optimum geometry to the carbonyl oxygen atom of the camphor substrate and could therefore contribute to the correct positioning of the comphor substrate for 5-exo-hydroxylation. These calculations also suggest that a steric analogue of camphor, containing an alkyl group which could prevent a water molecule from binding in this region, might inhibit cytochrome P450-cam by forming a more stable enzyme-ligand complex than camphor itself.

Key words

Protein-ligand interactions Inhibitor design Molecular mechanics Computer graphics 

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Copyright information

© ESCOM Science Publishers B.V 1990

Authors and Affiliations

  • Rebecca C. Wade
    • 1
  1. 1.Laboratory of Molecular BiophysicsUniversity of OxfordOxfordU.K.
  2. 2.Department of ChemistryUniversity of HoustonHoustonU.S.A.

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