Normal function · from ai-gene-review (P01308, commit 79fe13b38970) · AI-generated, not KB evidence

Insulin is a 51-amino acid peptide hormone composed of two polypeptide chains (A-chain and B-chain) linked by disulfide bonds. It is synthesized as preproinsulin in pancreatic beta cells, processed through the secretory pathway to generate mature insulin, and secreted into the extracellular space in response to elevated blood glucose. The primary core function of insulin is regulation of glucose homeostasis through binding to the insulin receptor, triggering intracellular signaling cascades (primarily PI3K/AKT and MAPK pathways) that stimulate glucose uptake in muscle and adipose tissue, suppress hepatic glucose production, promote glycogen synthesis, stimulate lipogenesis, and inhibit lipolysis and protein degradation. Beyond its metabolic roles, insulin has important functions in cell growth, proliferation, and neuroprotection.

Binds insulin receptor with high affinity to activate receptor tyrosine kinase signaling cascades regulating glucose homeostasis
Stimulates glucose uptake in muscle and adipose tissue through GLUT4 translocation via PI3K/AKT signaling
molecular function: insulin receptor binding · directly involved in: D-glucose transmembrane transport; glucose homeostasis · locations: extracellular region
Suppresses hepatic glucose production through inhibition of gluconeogenesis and glycogenolysis via AKT-mediated FoxO1 inactivation
Promotes lipogenesis and inhibits lipolysis in adipose tissue through SREBP-1c activation and HSL inactivation
Stimulates protein synthesis and inhibits protein degradation through mTORC1 activation and FoxO1 suppression
molecular function: insulin receptor binding · directly involved in: positive regulation of translation · locations: extracellular region
In the knowledge base · computed from kb/ at build time

Disorders

Relationship is the entry's genetic[].relationship_type. untyped means the entry has a genetic record for the gene but does not type it; its free-text association is shown instead.

DisorderRelationshipWhere the gene appears
Diabetes mellitus causative
mechanism: Monogenic Beta-Cell Dysfunction
subtype: PNDM4; maturity-onset diabetes of the young type 10
scoped to subtype: PNDM4, maturity-onset diabetes of the young type 10, type 1 diabetes mellitus
Type I Diabetes susceptibility germline
mechanism: Genetic Susceptibility
Polycystic Ovary Syndrome untyped
Risk Factor
mechanism: Population-Specific Metabolic vs. Inflammatory Dysregulation
ClinGen gene–disease validity · snapshot 2026-10-03 · matched to entries by MONDO

An entry matches when ClinGen's MONDO disease is the entry's own disease term, a subtype term, or an exact-match mapping. An amber status marks an entry ClinGen supports the gene for (Definitive, Strong or Moderate) whose own record does not type it. A Limited, Disputed or Refuted tier on such an entry is not a gap.

ClinGen diseaseMOIClassificationdismech entry
monogenic diabetes MONDO:0015967 AD Definitive
2020-05-13
monogenic diabetes MONDO:0015967 AR Definitive
2020-05-13

Identity from HGNC (snapshot 2026-10-01). Page layers are described in the gene pages documentation.