PMID- 21168390 OWN - NLM STAT- MEDLINE DCOM- 20110311 LR - 20131121 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 404 IP - 3 DP - 2011 Jan 21 TI - Insulin receptor substrates form high-molecular-mass complexes that modulate their availability to insulin/insulin-like growth factor-I receptor tyrosine kinases. PG - 767-73 LID - 10.1016/j.bbrc.2010.12.045 [doi] AB - Insulin receptor substrates (IRSs) are phosphorylated by activated insulin/insulin-like growth factor (IGF)-I receptor tyrosine kinases. Phosphotyrosyl IRSs are recognized by signaling molecules possessing src homology region 2 (SH2) domains, which mediate various insulin/IGF bioactivities. However, we have shown that IRSs are also associated with other proteins by a phosphotyrosine-independent mechanism. Here, we demonstrated that IRSs form high-molecular-mass complexes (we named these complexes IRSomes) with various proteins and we elucidated their possible roles. Blue native-polyacrylamide gel electrophoresis of cell lysates revealed IRSome formation. Some proteins associated with IRSs in IRS-isoform-, cell-type-, or stimulus-specific manners. Results of the in vitro tyrosine phosphorylation assay indicated that tyrosine phosphorylation of IRS-1 by insulin receptor was decreased when IRS-1 was contained in IRSomes prepared from 3T3-L1 adipocytes treated with TNF-alpha. Also, tyrosine phosphorylation of IRS-2 by IGF-I receptor was increased when IRS-2 was contained in IRSomes prepared from FRTL-5 thyrocytes treated with dibutyryl cAMP. These results demonstrated that cytokine/hormone-induced formation of IRSomes modulates availability of IRSs to receptor tyrosine kinases. CI - Copyright (c) 2010 Elsevier Inc. All rights reserved. FAU - Fukushima, Toshiaki AU - Fukushima T AD - Department of Animal Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan. FAU - Arai, Toshiya AU - Arai T FAU - Ariga-Nedachi, Miyako AU - Ariga-Nedachi M FAU - Okajima, Hiroshi AU - Okajima H FAU - Ooi, Yuko AU - Ooi Y FAU - Iijima, Yumi AU - Iijima Y FAU - Sone, Meri AU - Sone M FAU - Cho, Yoshitake AU - Cho Y FAU - Ando, Yasutoshi AU - Ando Y FAU - Kasahara, Kohei AU - Kasahara K FAU - Ozoe, Atsufumi AU - Ozoe A FAU - Yoshihara, Hidehito AU - Yoshihara H FAU - Chida, Kazuhiro AU - Chida K FAU - Okada, Shigeru AU - Okada S FAU - Kopchick, John J AU - Kopchick JJ FAU - Asano, Tomoichiro AU - Asano T FAU - Hakuno, Fumihiko AU - Hakuno F FAU - Takahashi, Shin-Ichiro AU - Takahashi S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20101217 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Insulin) RN - 0 (Insulin Receptor Substrate Proteins) RN - 0 (Multiprotein Complexes) RN - 0 (Tumor Necrosis Factor-alpha) RN - 42HK56048U (Tyrosine) RN - 63X7MBT2LQ (Bucladesine) RN - EC 2.7.10.1 (Receptor, IGF Type 1) SB - IM MH - 3T3-L1 Cells MH - Adipocytes/*metabolism MH - Animals MH - Bucladesine/metabolism MH - HEK293 Cells MH - Humans MH - Insulin/*metabolism MH - Insulin Receptor Substrate Proteins/*metabolism MH - Mice MH - Multiprotein Complexes/*metabolism MH - Phosphorylation MH - Receptor, IGF Type 1/*metabolism MH - Thyroid Gland/cytology/metabolism MH - Tumor Necrosis Factor-alpha/pharmacology MH - Tyrosine/metabolism EDAT- 2010/12/21 06:00 MHDA- 2011/03/12 06:00 CRDT- 2010/12/21 06:00 PHST- 2010/12/07 00:00 [received] PHST- 2010/12/08 00:00 [accepted] PHST- 2010/12/21 06:00 [entrez] PHST- 2010/12/21 06:00 [pubmed] PHST- 2011/03/12 06:00 [medline] AID - S0006-291X(10)02283-7 [pii] AID - 10.1016/j.bbrc.2010.12.045 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2011 Jan 21;404(3):767-73. doi: 10.1016/j.bbrc.2010.12.045. Epub 2010 Dec 17.