Interaction of Insulin Receptor Substrate-1 with the ς3A Subunit of the Adaptor Protein Complex-3 in Cultured Adipocytes*
Interaction of Insulin Receptor Substrate-1 with the ς3A Subunit of the Adaptor Protein Complex-3 in Cultured Adipocytes*
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培养脂肪细胞中胰岛素受体底物 1 与衔接蛋白复合物 3 的 ς3A 亚基的相互作用*
DOI:
--
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发表时间:
1998
影响因子:
4.8
通讯作者:
R. Heller
中科院分区:
文献类型:
--
作者:
B. Vanrenterghem;M. Morin;M. Czech;R. Heller
Signaling through the insulin receptor tyrosine kinase involves its autophosphorylation in response to insulin and the subsequent tyrosine phosphorylation of substrate proteins such as insulin receptor substrate-1 (IRS-1). In basal 3T3-L1 adipocytes, IRS-1 is predominantly membrane-bound, and this localization may be important in targeting downstream signaling elements that mediate insulin action. Since IRS-1 localization to membranes may occur through its association with specific membrane proteins, a 3T3-F442A adipocyte cDNA expression library was screened with non-tyrosine-phosphorylated, baculovirus-expressed IRS-1 in order to identify potential IRS-1 receptors. A cDNA clone that encodes ς3A, a small subunit of the AP-3 adaptor protein complex, was demonstrated to bind IRS-1 utilizing this cloning strategy. The specific interaction between IRS-1 and ς3A was further verified by in vitro binding studies employing baculovirus-expressed IRS-1 and a glutathione S-transferase (GST)-ς3A fusion protein. IRS-1 and ς3A were found to co-fractionate in a detergent-resistant population of low density membranes isolated from basal 3T3-L1 adipocytes. Importantly, the addition of exogenous purified GST-ς3A to low density membranes caused the release of virtually all of the IRS-1 bound to these membranes, while GST alone had no effect. These results are consistent with the hypothesis that ς3A serves as an IRS-1 receptor that may dictate the subcellular localization and the signaling functions of IRS-1.
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DOI:
10.1016/0167-4781(93)90222-y
发表时间:
1993
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Keller,SR;Aebersold,R;Garner,CW;Lienhard,GE
通讯作者:
Lienhard,GE
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Keller,SR;Kitagawa,K;Aebersold,R;Lienhard,GE;Garner,CW
通讯作者:
Garner,CW
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Kelly,KL;Ruderman,NB;Chen,KS
通讯作者:
Chen,KS
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Clancy,BM;Harrison,SA;Buxton,JM;Czech,MP
通讯作者:
Czech,MP
影响因子:
56.9
作者:
BRODSKY, FM
通讯作者:
BRODSKY, FM