Treatment of IM-9 cells with human growth hormone (GH) promotes rapid disulfide linkage of the GH receptor.
Treatment of IM-9 cells with human growth hormone (GH) promotes rapid disulfide linkage of the GH receptor.
复制标题
用人生长激素 (GH) 处理 IM-9 细胞可促进 GH 受体的快速二硫键连接。
DOI:
10.1210/endo.135.1.8013347
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发表时间:
1994
期刊:
影响因子:
4.8
通讯作者:
C. Epps
中科院分区:
文献类型:
--
作者:
S. Frank;G. Gilliland;C. Epps
Human GH (hGH) is believed to elicit its signal by promoting dimerization of the hGH receptor (hGHR). In this study, we examined a covalent linkage of receptors induced by hGH treatment of IM-9 cells. hGH induced a time- and concentration-dependent appearance of a disulfide-linked species of 215-230 kilodaltons, designated p215-230, that at 37 C was long-lived (> 1 h). p215-230 was confirmed to contain the hGHR (115-140 kilodaltons) as at least one of its constituents by two-dimensional diagonal sodium dodecyl sulfate-polyacrylamide gel electrophoresis. hGH induction of p215-230 required intact cells and was inhibitable by pretreatment of cells with N-ethylmaleimide (NEM), a sulfhydryl-reactive alkylating agent. NEM pretreatment did not, however, prevent hGH-dependent formation of a nondisulfide-linked p215-230 form, which was detected in NEM-pretreated hGH-stimulated cells by chemical cross-linking of detergent cell extracts. The disulfide-linked form of the hGHR accounted for a substantial fraction of the receptors that became tyrosine phosphorylated early into hGH treatment. However, formation of the disulfide-linked hGHR was not blocked by attenuation of tyrosine kinase activation, in that pretreatment of cells with staurosporine (1.25 microM) prevented detectable hGH-induced tyrosine phosphorylation without preventing the appearance of p215-230. These findings indicate that hGH induces its receptor to form a noncovalently associated complex, which then undergoes a rapid transition to a disulfide-linked form. These processes may have relevance to hGH signaling and/or hGHR trafficking.
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DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Carter-Su,C;Stubbart,JR;Wang,XY;Stred,SE;Argetsinger,LS;Shafer,JA
通讯作者:
Shafer,JA
影响因子:
4.8
作者:
Gorin,E;Goodman,HM
通讯作者:
Goodman,HM
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Winston,LA;Bertics,PJ
通讯作者:
Bertics,PJ
影响因子:
4.8
作者:
Silva,CM;Weber,MJ;Thorner,MO
通讯作者:
Thorner,MO