id author title date pages extension mime words sentences flesch summary cache txt cord-007261-b5fgb9wf Murakami, Kazuya The Transmembrane Region of Microsomal Cytochrome P450 Identified as the Endoplasmic Reticulum Retention Signal(1) 1994-07-17 .txt text/plain 6977 324 55 Another chimeric protein construct in which carboxyesterase Sec was connected to the C-terminal region of rat UDP-glucuronosyltransferase (UDP-GT), that contained a double-lysin ER retention motif, was also located in the ER, as determined from the endo H sensitivity and immunofluorescence staining. As a control, other types of fusion proteins were constructed in which the C-terminal portion of UDPglucronosyltransferase, which contains the double-lysine motif for the ER retention, was attached to carboxyesterase Sec. The fusion proteins were expressed in COS cells, and the subcellular localization of the fusion proteins was determined. To determine whether P450s are retained permanently in the ER or recycled between the ER and post-ER compartments through the "export and retrieval" process, we chose a lysosomal enzyme, cathepsin D, as a reporter, which was fused to the N-terminus of P450 at the DNA level and the fusion protein was expressed in COS cells. ./cache/cord-007261-b5fgb9wf.txt ./txt/cord-007261-b5fgb9wf.txt