Structure of cytochrome P450eryF involved in erythromycin biosynthesis

Nat Struct Biol. 1995 Feb;2(2):144-53. doi: 10.1038/nsb0295-144.

Abstract

Cytochrome P450eryF catalyzes the 6S-hydroxylation of 6-deoxyerythronolide B, the initial reaction in a multistep pathway to convert 6-deoxyerythronolide B into the antibiotic, erythromycin. The overall structure of P450eryF is similar to that of P450cam but differs in the exact positioning of several alpha-helices. The largest difference occurs in the B' helix and results in the enlargement of the substrate-binding pocket of P450eryF. The substrate is positioned with the macrolide ring perpendicular to the haem plane and contacts seven hydrophobic residues and three solvent molecules. The substrate participates in a network of hydrogen bonds that may provide a proton shuttle pathway in the oxygen cleavage reaction.

Publication types

  • Comparative Study
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Bacterial Proteins
  • Binding Sites
  • Camphor 5-Monooxygenase
  • Catalysis
  • Cytochrome P-450 Enzyme System / chemistry*
  • Erythromycin / analogs & derivatives
  • Erythromycin / biosynthesis*
  • Erythromycin / metabolism
  • Hydrogen Bonding
  • Hydroxylation
  • Mixed Function Oxygenases / chemistry*
  • Models, Molecular*
  • Molecular Sequence Data
  • Oxygen / metabolism
  • Protein Binding
  • Protein Conformation*
  • Protein Structure, Secondary
  • Sequence Alignment
  • Sequence Homology, Amino Acid

Substances

  • Bacterial Proteins
  • 6-deoxyerythronolide B
  • Erythromycin
  • Cytochrome P-450 Enzyme System
  • Mixed Function Oxygenases
  • eryF protein, Saccharopolyspora erythraea
  • Camphor 5-Monooxygenase
  • Oxygen