Abstract
Insulin induces a wide variety of growth and metabolic response in many cell types. Insulin initiates its biological effects by activation of tyrosine kinase in the beta-subunit and phosphorylates several proteins, such as insulin receptor substrate-1 (IRS-1), Shc. thereby activating phosphatidyl inositol 3-kinase activity, and ras activity. MAP kinase cascade activated by ras, 70kDaS6 kinase lying downstream of PI3-kinase, and the regulation of glycogen synthase have been discussed.
MeSH terms
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Animals
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Glycogen Synthase / metabolism
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Insulin / physiology*
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Insulin Receptor Substrate Proteins
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Liver / metabolism
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Phosphatidylinositol 3-Kinases
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Phosphoproteins / metabolism
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Phosphorylation
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Phosphotransferases (Alcohol Group Acceptor) / metabolism
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Protein-Tyrosine Kinases / metabolism
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Signal Transduction
Substances
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Insulin
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Insulin Receptor Substrate Proteins
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Phosphoproteins
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Glycogen Synthase
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Phosphatidylinositol 3-Kinases
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Phosphotransferases (Alcohol Group Acceptor)
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Protein-Tyrosine Kinases