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A stimulatory effect of increased salt concentration on the enzymatic activity of rat liver microsomes and a reconstituted system containing cytochrome P450 (P450) 2B1 and NADPH-P450 reductase was seen. Structural change of P450 2B1 accompanying the salt-induced increase in its enzyme activity was investigated by circular dichroism, fluorescence spectroscopy, and absorption spectroscopy. It was found that the salt increased alpha-helix content of P450 2B1 in the presence as well as in the absence of a phospholipid. Intrinsic fluorescence emissions also increased with increasing salt concentration. The low-spin iron configuration of P450 2B1 shifted toward the high-spin configuration in response to the increased salt concentration. It was found that the activity increase of P450 coincides with the raised alpha-helix content. The presence of phospholipid magnified this effect. It is proposed that the interaction with salts and phospholipid molecules surrounding P450 2B1 in the endoplasmic reticulum is important for a functional conformation of P450 2B1 in a monooxygenase system including NADPH-P450 reductase.
C H Yun, and
T Ahn, and
F P Guengerich
August 1997,
The Journal of biological chemistry,
C H Yun, and
T Ahn, and
F P Guengerich
February 2019,
FASEB journal : official publication of the Federation of American Societies for Experimental Biology,
C H Yun, and
T Ahn, and
F P Guengerich
August 1992,
Biochemical pharmacology,
C H Yun, and
T Ahn, and
F P Guengerich
June 2000,
Archives of biochemistry and biophysics,
C H Yun, and
T Ahn, and
F P Guengerich
February 1997,
Mutation research,
C H Yun, and
T Ahn, and
F P Guengerich
November 1995,
Archives of biochemistry and biophysics,
C H Yun, and
T Ahn, and
F P Guengerich
February 2002,
FEBS letters,
C H Yun, and
T Ahn, and
F P Guengerich
September 2002,
Kidney international,
C H Yun, and
T Ahn, and
F P Guengerich
October 1988,
FEBS letters,
C H Yun, and
T Ahn, and
F P Guengerich
December 2012,
Biochemistry,
