Domain-dependent effects of insulin and IGF-1 receptors on signalling and gene expression

Weikang Cai, Masaji Sakaguchi, Andre Kleinridders, Gonzalo Gonzalez-Del Pino, Jonathan M. Dreyfuss, Brian T. O’Neill, Alfred K. Ramirez, Hui Pan, Jonathon N. Winnay, Jeremie Boucher, Michael J. Eck and C. Ronald Kahn ()
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Weikang Cai: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Masaji Sakaguchi: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Andre Kleinridders: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Gonzalo Gonzalez-Del Pino: Dana-Farber Cancer Institute
Jonathan M. Dreyfuss: Bioinformatics Core, Joslin Diabetes Center
Brian T. O’Neill: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Alfred K. Ramirez: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Hui Pan: Bioinformatics Core, Joslin Diabetes Center
Jonathon N. Winnay: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Jeremie Boucher: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center
Michael J. Eck: Dana-Farber Cancer Institute
C. Ronald Kahn: Section of Integrative Physiology and Metabolism, Joslin Diabetes Center

Nature Communications, 2017, vol. 8, issue 1, 1-14

Abstract: Abstract Despite a high degree of homology, insulin receptor (IR) and IGF-1 receptor (IGF1R) mediate distinct cellular and physiological functions. Here, we demonstrate how domain differences between IR and IGF1R contribute to the distinct functions of these receptors using chimeric and site-mutated receptors. Receptors with the intracellular domain of IGF1R show increased activation of Shc and Gab-1 and more potent regulation of genes involved in proliferation, corresponding to their higher mitogenic activity. Conversely, receptors with the intracellular domain of IR display higher IRS-1 phosphorylation, stronger regulation of genes in metabolic pathways and more dramatic glycolytic responses to hormonal stimulation. Strikingly, replacement of leucine973 in the juxtamembrane region of IR to phenylalanine, which is present in IGF1R, mimics many of these signalling and gene expression responses. Overall, we show that the distinct activities of the closely related IR and IGF1R are mediated by their intracellular juxtamembrane region and substrate binding to this region.

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14892

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DOI: 10.1038/ncomms14892

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