Structure of the Human Erythrocyte Insulin Receptor

Structure of the Human Erythrocyte Insulin Receptor
复制标题

人红细胞胰岛素受体的结构

DOI:
10.2337/diab.35.1.101
复制
发表时间:
1986
期刊:
影响因子:
7.7
通讯作者:
L. Harrison
L. Harrison
中科院分区:
医学1区
文献类型:
--
作者:
G. Ward;L. Harrison

文献摘要

参考文献

被引文献

相似文献

使用125 I-胰岛素的二琥珀酰亚胺辛二酸酯(DSS)交联和表面[125 I]碘化,然后通过受体免疫沉淀技术,确定完整人红细胞中胰岛素受体的结构。与最近的一份报告相反,我们发现红细胞胰岛素受体在结构上与胰岛素的经典靶组织相似,至少由三种分子量约为295,000、265,000和245,000的物质组成,含有分子量约为130,000和95,000的二硫键连接亚基。三种寡聚体形式的相互转化可以介导受体亲和力的变化,如在其他组织中假设的那样。只有在使用Iodogen在Tris/Hepes缓冲液中进行表面碘化时,才能通过免疫沉淀法检测到95,000亚基,而如果使用磷酸盐缓冲盐水或乳过氧化物酶碘化,则无法检测到95,000亚基。这些发现表明,胰岛素在红细胞中缺乏生物效应不能用其胰岛素受体结构的严重缺陷来解释。红细胞和胰岛素靶组织中胰岛素受体结构的表观一致性为在某些情况下使用红细胞反映胰岛素受体状态提供了更坚实的基础。
The structure of the insulin receptor in intact human erythrocytes was defined using the techniques of disuccinimidyl suberate (DSS) cross-linking of 125I-insulin and surface [125I]iodination followed by receptor immunoprecipitation. In contrast to a recent report, we found the erythrocyte insulin receptor to be similar in structure to that in classic target tissues for insulin, consisting of at least three species of molecular weight approximately 295,000, 265,000, and 245,000, containing disulfide-linked subunits of molecular weight approximately 130,000 and 95,000. The interconversion of the three oligomeric forms could mediate changes in receptor affinity as postulated in other tissues. The 95,000 subunit was detected by immunoprecipitation only if surface iodination was performed in a Tris/Hepes buffer using lodogen and not if phosphate-buffered saline or lactoperoxidase iodination was used. These findings indicate that the lack of a bioeffect of insulin in erythrocytes is not explained by a gross defect in the structure of their insulin receptors. The apparent identity of the insulin receptor structure in erythrocytes and insulin target tissues provides a firmer basis for the use of erythrocytes in some circumstances to reflect insulin receptor status.
人红细胞胰岛素受体的分离和表征。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Im,JH;Meezan,E;Rackley,CE;Kim,HD
通讯作者: Kim,HD
从人红细胞中溶解的胰岛素受体的胰岛素结合和胰岛素依赖性磷酸化。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Grigorescu,F;White,MF;Kahn,CR
通讯作者: Kahn,CR
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Massagué,J;Czech,MP
通讯作者: Czech,MP
具有完全结合活性的胰岛素受体的纯化。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Fujita-Yamaguchi,Y;Choi,S;Sakamoto,Y;Itakura,K
通讯作者: Itakura,K
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Roth,RA;Mesirow,ML;Cassell,DJ
通讯作者: Cassell,DJ