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GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
GPI-anchor structure
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In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
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Related Experiment Video

Updated: Feb 7, 2026

GPI Anchoring of Proteins in the ER Membrane
01:29

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Polycystic ovarian disease.

R L Barbieri1

  • 1Department of Obstetrics and Gynecology, State University of New York, Stony Brook 11794-8091.

Annual Review of Medicine
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

Polycystic ovarian disease (PCOD) is a common hormonal disorder. Research suggests insulin resistance, potentially linked to insulin receptor gene mutations, may play a role in PCOD development.

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Area of Science:

  • Endocrinology
  • Genetics
  • Reproductive Medicine

Background:

  • Polycystic ovarian disease (PCOD) is a prevalent endocrine disorder affecting women of reproductive age.
  • The precise molecular underpinnings of PCOD remain incompletely understood.
  • Observed correlations between hyperinsulinemia and hyperandrogenism suggest a potential role for insulin resistance in PCOD pathogenesis.

Purpose of the Study:

  • To investigate the potential link between insulin resistance and the molecular causes of Polycystic Ovarian Disease (PCOD).
  • To explore the association between genetic factors, specifically the insulin receptor gene, and the PCOD phenotype.

Main Methods:

  • Review of existing literature on PCOD, hyperinsulinemia, hyperandrogenism, and insulin resistance.
  • Analysis of the correlation between insulin resistance markers and PCOD symptoms.
  • Examination of studies reporting on mutations in the insulin receptor gene in women with PCOD.

Main Results:

  • Hyperinsulinemia and hyperandrogenism are frequently observed together in women with PCOD.
  • Insulin resistance is increasingly implicated as a contributing factor in the development of PCOD.
  • Specific point mutations in the insulin receptor gene are associated with the clinical presentation of PCOD.

Conclusions:

  • Insulin resistance is a significant factor in the pathogenesis of Polycystic Ovarian Disease.
  • Genetic variations, particularly in the insulin receptor gene, may predispose women to PCOD.
  • Further research into the molecular mechanisms of insulin resistance in PCOD is warranted.