Signal Peptide and Denaturing Temperature are Critical Factors for Efficient Mammalian Expression and Immunoblotting of Cannabinoid Receptors
10.1007/s11596-012-0052-4
- Author:
WANG CHENYUN
1
;
WANG YINGYING
;
WANG MIAO
;
CHEN JIANKUI
;
YU NONG
;
SONG SHIPING
;
KAMINSKI E. NORBERT
;
ZHANG WEI
Author Information
1. Department of Pharmaceutical Administration,Beijing 100850,China
- Keywords:
cannabinoid receptor 1;
cannabinoid receptor 2;
denaturing temperature;
signal peptide;
mammalian expression
- From:
Journal of Huazhong University of Science and Technology (Medical Sciences)
2012;32(2):299-302
- CountryChina
- Language:Chinese
-
Abstract:
Many researchers employed mammalian expression system to artificially express cannabinoid receptors,but immunoblot data that directly prove efficient protein expression can hardly be seen in related research reports.In present study,we demonstrated cannabinoid receptor protein was not able to be properly expressed with routine mammalian expression system.This inefficient expression was rescued by endowing an exogenous signal peptide ahead of cannabinoid receptor peptide.In addition,the artificially synthesized cannabinoid receptor was found to aggregate under routine sample denaturing temperatures (i.e.,≥95℃),forming a large molecular weight band when analyzed by immuno-blotting.Only denaturing temperatures ≤75℃ yielded a clear band at the predicted molecular weight.Collectively,we showed that efficient mammalian expression of cannabinoid receptors need a signal peptide sequence,and described the requirement for a low sample denaturing temperature in immuno-blot analysis.These findings provide very useful information for efficient mammalian expression and immuno-blotting of mcmbrane receptors.
