Abstract

Cytochrome P450 1A is one of the vital subfamilies of heme-containing cytochrome P450 enzymes belonging to an important exogenous metabolizing CYP in human. The abnormal of endoplasmic reticulum (ER) may directly affect the functional activity of ER-located CYP1A and be associated with the occurrence and development of various diseases. In the present study, we constructed a selective two-photon fluorescent probeERNMfor rapid and visual detection of endogenous CYP1A that was localized in the ER.ERNMcould target the ER and detect the enzymatically active CYP1A in living cells and tissues. The monitoring ability ofERNMfor the fluctuations in functionality level of CYP1A was confirmed using ER stressed A549 cell. Based on the ER-targeting two-photon probe for CYP1A, the close association of ER state and the functional activity of ER-locating CYP1A was confirmed, which would promote the deep understanding of the biofunction of CYP1A in various ER-related diseases.Keywords:cytochrome P450 1A;fluorescent probe;endoplasmic reticulum-targeting;enzymatically active probe;two-photon