The Insulin Receptor and Its Signal Transduction Network
- PMID: 27512793
- Bookshelf ID: NBK378978
The Insulin Receptor and Its Signal Transduction Network
Excerpt
Insulin is an anabolic peptide hormone secreted by the b cells of the pancreas acting through a receptor located in the membrane of target cells - major ones being liver (where it promotes glucose storage into glycogen and decreases glucose output), as well as skeletal muscle and fat (where it stimulates glucose transport through translocation of GLUT4), but also b cells, brain cells and in fact most cells, where it has pleiotropic effects.
The receptor belongs to the receptor tyrosine kinase superfamily and has orthologues in all metazoans. The structure of the unbound extracellular domain ("apo-receptor") has been solved. Insulin binds to two distinct sites on each a subunit of the receptor, crosslinking the two receptor halves to create high affinity. The structure of the site 1 interface has also been solved, as well as the structure of the inactive and activated tyrosine kinase, revealing the activation by phosphorylation of an autoinhibitory loop.
The receptor activates a complex intracellular signaling network through IRS proteins and the canonical PI3K and ERK cascades. Overall and tissue-specific targeted gene disruption in mice has explored the role of many of the signaling proteins in creating the type 2 diabetes phenotype, with some surprising results. Insulin signaling in the liver and b cell is emerging as the major determinant in preventing type 2 diabetes, through the integrative role of molecules like IRS2 and FOXO, preventing b cell dedifferentiation. The emerging new biology of diabetes opens novel therapeutic opportunities for the 442 million type 2 diabetics worldwide. For complete coverage of this and all related areas of Endocrinology, please visit our FREE on-line web-textbook,
Copyright © 2000-2025, MDText.com, Inc.
Sections
- ABSTRACT
- INTRODUCTION
- THE RECEPTOR TYROSINE KINASE SUPERFAMILY
- MODULAR STRUCTURE OF THE INSULIN RECEPTOR
-
STRUCTURE OF THE UNBOUND INSULIN RECEPTOR ECTODOMAIN (
apo -RECEPTOR) - DEFINITION OF THE RECEPTOR BINDING SURFACES ON THE INSULIN AND RECEPTOR MOLECULES
- STRUCTURE OF THE SITE 1 INSULIN-RECEPTOR COMPLEX
- QUANTITATIVE ANALYSIS OF THE INSULIN-RECEPTOR BINDING PARAMETERS: THE HARMONIC OSCILLATOR MODEL
- STRUCTURE OF THE INSULIN RECEPTOR TYROSINE KINASE
- MECHANISM OF INSULIN RECEPTOR ACTIVATION BY LIGAND BINDING
- THE INTRACELLULAR INSULIN RECEPTOR SIGNAL TRANSDUCTION NETWORK
- The PI3K Signaling Pathway
- The MAPK-ERK Signaling Pathway
- INSULIN REGULATION OF GLUT4 TRANSLOCATION
- NEGATIVE REGULATION OF INSULIN RECEPTOR SIGNALING, SIGNAL TERMINATION
- Insulin Receptor and IRS Proteins Downregulation
- Serine phosphorylation of IRS Proteins
- Dephosphorylation of Insulin Signaling Proteins by Protein Phosphatases and Phospholipid Phosphatases
- Other attenuators of insulin receptor signaling: suppressor of cytokine signaling (SOCS) proteins, growth-factor-receptor-bound protein 10/14 (Grb10/14) and plasma-cell membrane glycoprotein-1 (PC-1)
- Negative Regulation of PI3K and Insulin Action by the PI3K Regulatory Subunit
- CLINICAL IMPLICATIONS OF THE INSULIN RECEPTOR AND SIGNAL TRANSDUCTION NETWORK
- CONCLUSIONS AND PERSPECTIVES
- ACKNOWLEDGEMENTS
- REFERENCES
Similar articles
-
EMS Diabetic Protocols For Treat and Release.2023 Jul 17. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. 2023 Jul 17. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. PMID: 32809447 Free Books & Documents.
-
Depressing time: Waiting, melancholia, and the psychoanalytic practice of care.In: Kirtsoglou E, Simpson B, editors. The Time of Anthropology: Studies of Contemporary Chronopolitics. Abingdon: Routledge; 2020. Chapter 5. In: Kirtsoglou E, Simpson B, editors. The Time of Anthropology: Studies of Contemporary Chronopolitics. Abingdon: Routledge; 2020. Chapter 5. PMID: 36137063 Free Books & Documents. Review.
-
Gallium Scan.2022 Dec 26. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. 2022 Dec 26. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. PMID: 33620825 Free Books & Documents.
-
Hyperphosphatemia.2023 Jun 12. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. 2023 Jun 12. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. PMID: 31869067 Free Books & Documents.
-
Trends in Surgical and Nonsurgical Aesthetic Procedures: A 14-Year Analysis of the International Society of Aesthetic Plastic Surgery-ISAPS.Aesthetic Plast Surg. 2024 Oct;48(20):4217-4227. doi: 10.1007/s00266-024-04260-2. Epub 2024 Aug 5. Aesthetic Plast Surg. 2024. PMID: 39103642 Review.
Publication types
LinkOut - more resources
Full Text Sources
Miscellaneous