CYP2J2 epoxygenase membrane anchor plays an important role in facilitating electron transfer from CPR

Daryl D. Meling, Daniel R. McDougle, Aditi Das

Research output: Contribution to journalArticlepeer-review

Abstract

CYP2J2 epoxygenase is a membrane-bound cytochrome P450 primarily expressed in the heart and plays a significant role in cardiovascular diseases. The interactions of CYP2J2 with its redox partner, cytochrome P450 reductase (CPR), and with its substrates are quite complex and can have a significant effect on the kinetics of substrate metabolism. Here we show that the N-terminus of CYP2J2 plays an important role in the formation of CYP-CPR complex for subsequent electron transfer. We demonstrate that when CYP2J2-CPR are pre-incubated before the onset of reduction, the kinetics of reduction is triphasic and is of a similar order of magnitude to previously reported rates in other cytochrome P450 systems. However, when CYP2J2 and CPR form a complex during the time course of the experiment the kinetics of the fastest phase for N-terminus containing full-length CYP2J2 is 200 times faster than the kinetics of reduction of N-terminally truncated CYP2J2. Hence, we show that the N-terminus of CYP2J2 is very important to form a productive CYP-CPR complex to facilitate electron transfer.

Original languageEnglish (US)
Pages (from-to)47-53
Number of pages7
JournalJournal of Inorganic Biochemistry
Volume142
DOIs
StatePublished - Jan 2015

Keywords

  • CYP2J2
  • Cytochrome P450 reductase
  • Electron transfer
  • Nanodiscs
  • Stopped flow

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry

Fingerprint

Dive into the research topics of 'CYP2J2 epoxygenase membrane anchor plays an important role in facilitating electron transfer from CPR'. Together they form a unique fingerprint.

Cite this