Altered spin state equilibrium in the T309V mutant of cytochrome P450 2D6: A spectroscopic and computational study

Alois Bonifacio, André R. Groenhof, Peter H.J. Keizers, Chris De Graaf, Jan N.M. Commandeur, Nico P.E. Vermeulen, Andreas W. Ehlers, Koop Lammertsma, Cees Gooijer, Gert Van Der Zwan

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Cytochrome P450 2D6 (CYP2D6) is one of the most important cytochromes P450 in humans. Resonance Raman data from the T309V mutant of CYP2D6 show that the substitution of the conserved I-helix threonine situated in the enzyme's active site perturbs the heme spin equilibrium in favor of the six-coordinated low-spin species. A mechanistic hypothesis is introduced to explain the experimental observations, and its compatibility with the available structural and spectroscopic data is tested using quantum-mechanical density functional theory calculations on active-site models for both the CYP2D6 wild type and the T309V mutant.

Original languageEnglish
Pages (from-to)645-654
Number of pages10
JournalJournal of Biological Inorganic Chemistry
Volume12
Issue number5
DOIs
Publication statusPublished - Jun 2007
Externally publishedYes

Keywords

  • Cytochrome P450 2D6
  • Resonance Raman
  • Spin equilibrium
  • T309V
  • Threonine mutant

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry

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