PMID- 16563352 OWN - NLM STAT- MEDLINE DCOM- 20060524 LR - 20131121 IS - 0006-291X (Print) IS - 0006-291X (Linking) VI - 343 IP - 3 DP - 2006 May 12 TI - Binding of bufuralol, dextromethorphan, and 3,4-methylenedioxymethylamphetamine to wild-type and F120A mutant cytochrome P450 2D6 studied by resonance Raman spectroscopy. PG - 772-9 AB - Cytochrome P450 2D6 (CYP2D6) is one of the most important drug-metabolizing enzymes in humans. Resonance Raman data, reported for the first time for CYP2D6, show that the CYP2D6 heme is found to be in a six-coordinated low-spin state in the absence of substrates, and it is perturbed to different extents by bufuralol, dextromethorphan, and 3,4-methylenedioxymethylamphetamine (MDMA). Dextromethorphan and MDMA induce in CYP2D6 a significant amount of five-coordinated high-spin heme species and reduce the polarity of its heme-pocket, whereas bufuralol does not. Spectra of the F120A mutant CYP2D6 suggest that Phe120 is involved in substrate-binding of dextromethorphan and MDMA, being responsible for the spectral differences observed between these two compounds and bufuralol. These differences could be explained postulating a different substrate mobility for each compound in the CYP2D6 active site, consistently with the role previously suggested for Phe120 in binding dextromethorphan and MDMA. FAU - Bonifacio, Alois AU - Bonifacio A AD - Laser Centre/Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit Amsterdam, The Netherlands. FAU - Keizers, Peter H J AU - Keizers PH FAU - Commandeur, Jan N M AU - Commandeur JN FAU - Vermeulen, Nico P E AU - Vermeulen NP FAU - Robert, Bruno AU - Robert B FAU - Gooijer, Cees AU - Gooijer C FAU - van der Zwan, Gert AU - van der Zwan G LA - eng PT - Journal Article DEP - 20060320 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Ethanolamines) RN - 42VZT0U6YR (Heme) RN - 7355X3ROTS (Dextromethorphan) RN - 891H89GFT4 (bufuralol) RN - EC 1.14.14.1 (Cytochrome P-450 CYP2D6) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Amino Acid Substitution MH - Binding Sites MH - Cytochrome P-450 CYP2D6/*chemistry/genetics MH - Dextromethorphan/*chemistry/metabolism MH - Ethanolamines/*chemistry/metabolism MH - Heme/chemistry MH - Humans MH - Mutation MH - N-Methyl-3,4-methylenedioxyamphetamine/*chemistry/metabolism MH - Spectrum Analysis, Raman EDAT- 2006/03/28 09:00 MHDA- 2006/05/25 09:00 CRDT- 2006/03/28 09:00 PHST- 2006/03/06 00:00 [received] PHST- 2006/03/07 00:00 [accepted] PHST- 2006/03/28 09:00 [pubmed] PHST- 2006/05/25 09:00 [medline] PHST- 2006/03/28 09:00 [entrez] AID - S0006-291X(06)00550-X [pii] AID - 10.1016/j.bbrc.2006.03.027 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2006 May 12;343(3):772-9. doi: 10.1016/j.bbrc.2006.03.027. Epub 2006 Mar 20.