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
复制
发表时间:
1994
期刊:
影响因子:
4.8
通讯作者:
C. Epps
C. Epps
中科院分区:
医学2区
文献类型:
--
作者:
S. Frank;G. Gilliland;C. Epps

文献摘要

参考文献

被引文献

相似文献

据信人GH(hGH)通过促进hGH受体(hGHR)的二聚化来引发其信号。在这项研究中,我们研究了由hGH处理IM-9细胞诱导的受体的共价键。hGH诱导215-230千道尔顿的二硫键连接的物质(命名为p215-230)的时间和浓度依赖性出现,其在37 ℃下是长寿命的(> 1小时)。通过二维对角十二烷基硫酸钠-聚丙烯酰胺凝胶电泳证实p215-230含有hGHR(115-140千道尔顿)作为其组分中的至少一种。p215-230的hGH诱导需要完整的细胞,并且可通过用N-乙基马来酰亚胺(NEM)(一种巯基反应性烷化剂)预处理细胞来实现。NEM预处理没有,但是,防止生长激素依赖性的非二硫键连接的p215-230的形式,这是检测在NEM预处理的生长激素刺激的细胞通过化学交联的洗涤剂细胞提取物。hGHR的二硫键连接形式占hGH处理早期酪氨酸磷酸化受体的很大一部分。然而,二硫键连接的hGHR的形成并没有被酪氨酸激酶激活的衰减所阻断,因为用星形孢菌素(1.25 μ M)预处理细胞阻止了可检测的hGH诱导的酪氨酸磷酸化,而没有阻止p215-230的出现。这些发现表明,hGH诱导其受体形成非共价缔合的复合物,然后快速转变为二硫键连接的形式。这些过程可能与hGH信号传导和/或hGHR运输相关。
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.
生长激素受体相关酪氨酸激酶对高度纯化的生长激素受体进行磷酸化。
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
生长激素与大鼠脂肪细胞表面受体的共价结合。
DOI: 10.1210/endo-114-4-1279
发表时间: 1984
期刊: Endocrinology
影响因子: 4.8
作者:
Gorin,E;Goodman,HM
通讯作者: Goodman,HM
生长激素刺激 42-和 45-kDa ERK 相关蛋白的酪氨酸磷酸化。
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
通过激活生长激素受体刺激人体细胞中的酪氨酸磷酸化。
DOI: 10.1210/endo.132.1.7678212
发表时间: 1993
期刊: Endocrinology
影响因子: 4.8
作者:
Silva,CM;Weber,MJ;Thorner,MO
通讯作者: Thorner,MO