Role of carbohydrate in human chorionic gonadotropin: deglycosylation uncouples hormone-receptor complex and adenylate cyclase system.
Role of carbohydrate in human chorionic gonadotropin: deglycosylation uncouples hormone-receptor complex and adenylate cyclase system.
复制标题
碳水化合物在人绒毛膜促性腺激素中的作用:去糖基化使激素受体复合物和腺苷酸环化酶系统解偶联。
DOI:
10.1016/0006-291x(82)91880-0
复制
发表时间:
1982
影响因子:
3.1
通讯作者:
Bahl,OP
中科院分区:
文献类型:
--
作者:
Thotakura,NR;Bahl,OP
Previous work has shown that deglycosylation of human chorionic gonadotropin (hCG) does not affect its receptor binding characteristics, but its ability to stimulate intracellular cyclic AMP accumulation and steroidogenesis in ovarian cells is abolished. To identify the site at which carbohydrate of hCG is involved in the mechanism of action of the hormone, we have studied adenylate cyclase activity in ovarian membrane preparations in response to deglycosylated and native hCG. The deglycosylated hCG does not stimulate adenylate cyclase of ovarian membrane preparation and also it acts as an inhibitor of hCG action. Data are presented to show that both hCG- and catecholamine receptors are coupled to the same adenylate cyclase complex. Since adenylate cyclase activity in the presence of deglycosylated hCG remains still responsive maximally to catecholamines, it indicates that the adenylate cyclase complex is functional and is unaffected by the interaction of deglycosylated hCG to its receptor. This is further supported by the fact that the deglycosylated hCG does not impair the maximal stimulation of adenylate cyclase by guanine nucleotides. Thus, the site of action of the carbohydrate of hCG is prior to the coupling of the hormone-receptor complex and the adenylate cyclase system.
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影响因子:
5
作者:
HALEY, RW;CULVER, DH;EMORI, TG
通讯作者:
EMORI, TG
影响因子:
--
作者:
J. Adler;J. Burke;M. Finland
通讯作者:
M. Finland
影响因子:
3.1
作者:
MAKI, DG;SCHUNA, AA
通讯作者:
SCHUNA, AA
影响因子:
6.4
作者:
J. Mcgowan;M. Finland
通讯作者:
M. Finland
DOI:
--
发表时间:
1984
期刊:
MMWR CDC Surveillance Summaries
影响因子:
--
作者:
W. Jarvis;John W. White;Munn Vp;Moss Jl;Emori Tg;D. Culver;C. Thornsberry;J. Hughes
通讯作者:
J. Hughes