The role of the carbohydrate moiety in thyrotropin action.

The role of the carbohydrate moiety in thyrotropin action.
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碳水化合物部分在促甲状腺素作用中的作用。

DOI:
10.1016/0006-291x(85)90958-1
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发表时间:
1985
影响因子:
3.1
通讯作者:
Nayfeh,SN
Nayfeh,SN
中科院分区:
生物学4区
文献类型:
--
作者:
Berman,MI;ThomasJr,CG;Manjunath,P;Sairam,MR;Nayfeh,SN

文献摘要

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去糖基化的人TSH的相对结合亲和力比天然TSH高6倍。虽然去糖基化的人促甲状腺激素显着刺激腺苷酸环化酶,它是不如天然激素有效。然而,当去糖基化的人TSH与牛TSH一起加入时,观察到剂量依赖性拮抗作用。特别是,次最大和最大浓度的牛促甲状腺激素和去糖基化的人促甲状腺激素导致cAMP值远低于单个激素的活动的总和。这些数据表明,虽然TSH去糖基化的效果不像促性腺激素那样显著,但TSH的碳水化合物似乎是激素最大程度激活腺苷酸环化酶所必需的。
The relative binding affinity of deglycosylated human TSH was 6-fold higher than that of native TSH. Although deglycosylated human TSH significantly stimulated adenlyate cyclase, it was less effective than the native hormone. When deglycosylated human TSH was added with bovine TSH, however, a dose-dependent antagonism was observed. In particular, submaximal and maximal concentrations of bovine TSH and deglycosylated human TSH resulted in cAMP values much lower than the sum of activities of the individual hormones. The data suggest that although the effects of TSH deglycosylation are not as dramatic as with the gonadotropins, the carbohydrates of TSH appear to be required for maximal activation of adenylate cyclase by the hormone.
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发表时间: 1985
影响因子: --
作者:
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发表时间: 1982
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影响因子: 4.8
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