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Mammalian microsomal cytochrome P450 monooxygenase: structural adaptations for membrane binding and functional diversity

Academic Article
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Overview

authors

  • Williams, P. A.
  • Cosme, J.
  • Sridhar, V.
  • Johnson, Eric
  • McRee, Duncan

publication date

  • January 2000

journal

  • Molecular Cell  Journal

abstract

  • Microsomal cytochrome P450s participate in xenobiotic detoxification, procarcinogen activation, and steroid hormone synthesis. The first structure of a mammalian microsomal P450 suggests that the association of P450s with the endoplasmic reticulum involves a hydrophobic surface of the protein formed by noncontiguous portions of the polypeptide chain. This interaction places the entrance of the putative substrate access channel in or near the membrane and orients the face of the protein proximal to the heme cofactor perpendicular to the plane of the membrane for interaction with the P450 reductase. This structure offers a template for modeling other mammalian P450s and should aid drug discovery and the prediction of drug-drug interactions.

subject areas

  • Amino Acid Sequence
  • Animals
  • Binding Sites
  • Crystallography, X-Ray
  • Cytochrome P-450 Enzyme System
  • Endoplasmic Reticulum
  • Heme
  • Mammals
  • Microsomes
  • Models, Molecular
  • Molecular Sequence Data
  • Protein Structure, Secondary
  • Steroid 21-Hydroxylase
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Identity

International Standard Serial Number (ISSN)

  • 1097-2765

Digital Object Identifier (DOI)

  • 10.1016/s1097-2765(00)80408-6

PubMed ID

  • 10678174
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Additional Document Info

start page

  • 121

end page

  • 131

volume

  • 5

issue

  • 1

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