KMID : 0624620080410110808
|
|
BMB Reports 2008 Volume.41 No. 11 p.808 ~ p.813
|
|
Expression and purification of human mPGES-1 in E. coli and identification of inhibitory compounds from a drug-library
|
|
Kim Woo-Il
Choi Kyung-A Do Hyun-Soo Yu Yeon-Gyu
|
|
Abstract
|
|
|
Human microsomal prostaglandin E synthase-1 (mPGES-1) is a membrane associated protein that catalyzes the conversion of prostaglandin H2 (PGH2) into prostaglandin E2 (PGE2). In this study, the expression of human mPGES-1 in E. coli was significantly enhanced by modifying the utility of specific codons and the recombinant mPGES-1 was efficiently purified to homogeneity. The Km and Vmax of the purified enzyme were determined and the trimeric state characterized by chemical cross-linking with glutaraldehyde. The purified mPGES-1 was used for the screening of a chemical library of bioactive or drug compounds to identify novel inhibitors, and oxacillin and dyphylline were identified as moderately inhibiting mPGES-1 with IC50 values of 100 and 200 ¥ìM, respectively. As these compounds competitively inhibited the catalysis of PGH2, their binding sites appeared to be located near the PGH2 binding pocket.
|
|
KEYWORD
|
|
Codon usage, Inhibitor, mPGES-1, Overexpression, Screening
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|