Exocytosis
Exocytosis — The cellular process of transporting material out of a cell by fusion of secretory vesicles with the plasma membrane, the mechanism for peptide hormone secretion.
What Is Exocytosis?
Exocytosis is the fusion of intracellular vesicles with the plasma membrane to release their contents into the extracellular space. Regulated exocytosis is the mechanism by which peptide hormones, neuropeptides, and AMPs are secreted from cells in response to specific signals (Ca²⁺ influx, receptor activation).
Context
- Peptide secretion: Dense-core vesicles release neuropeptides by Ca²⁺-dependent exocytosis
- Insulin: Glucose-stimulated exocytosis of insulin granules from pancreatic beta cells
- AMP release: Defensin-containing granules released from neutrophils during degranulation
Frequently Asked Questions
What is Exocytosis?
The cellular process of transporting material out of a cell by fusion of secretory vesicles with the plasma membrane, the mechanism for peptide hormone secretion.
Why is Exocytosis important in peptide research?
Exocytosis is a fundamental concept in biology as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.