exocytosis
Let an agent explain exocytosis and its forms, relay the molecular machinery and physiological roles from cell biology references, describe its relevance to disease and toxins, and distinguish it from endocytosis and other secretion routes.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain exocytosis and its forms, relay the molecular machinery and physiological roles from cell biology references, describe its relevance to disease and toxins, and distinguish it from endocytosis and other secretion routes.
The process by which a cell releases the contents of a vesicle to the exterior by fusing the vesicle membrane with the plasma membrane, in constitutive form for continuous secretion of proteins and membrane components and in regulated form triggered by calcium for release of neurotransmitters, hormones and granule contents in degranulation, also inserting receptors and other proteins into the membrane and releasing exosomes; exocytosis is mediated by SNARE proteins and is the counterpart of endocytosis.
What it is for: Releasing vesicle contents and inserting membrane components.
It can be explain forms and machinery; relay physiological roles; describe disease relevance; distinguish from related processes.
Distinguishing features
Membrane fusion
SNARE machinery
Calcium regulation
Membrane insertion
What it looks like
Not visible; vesicle fusion seen in electron micrographs and live imaging.
Physical character
synaptic vesicle fusion time: under 1 ms - after calcium entry
How it is recognised
Vesicle fusion with the plasma membrane to release contents
Constitutive, regulated, degranulation, exosomal secretion
Endocytosis takes material in; non-vesicular secretion uses transporters
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is mediated by - the fusion machinery
is the counterpart of - uptake into the cell
In practice
Families and kinds
constitutive exocytosis
regulated exocytosis in neurons and endocrine cells
degranulation in immune cells
exosomal secretion
exocytic insertion of receptors such as at postsynaptic membranes
kiss-and-run and full fusion modes
Identifiers
Gene Ontology GO:0006887 exocytosis
Standards and regulation
No regulation of the process; research standards
Failure modes and hazards
Toxins such as botulinum blocking exocytosis
Confusing exocytosis with other secretion
Overgeneralising between cell types
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What exocytosis is.
Science.
Definition
Definition and forms.
Definition
Definition.
- What is exocytosis, and how do constitutive and regulated forms differ? definition
- Is the process exocytosis, endocytosis or transporter-mediated secretion? boundary
Machinery
Molecular machinery.
Machinery
Machinery.
- How do SNAREs, synaptotagmin and calcium drive vesicle fusion? definition
- Which entry fits SNARE protein? action
Function Physiological roles.
Science.
Neurons
Neurotransmission.
Neurons
Neurons.
- How does exocytosis release neurotransmitters and insert receptors at synapses? provenance
- Which entry fits synaptic transmission? action
Immune
Hormones and immunity.
Immune
Immune.
- How do endocrine secretion and immune degranulation use regulated exocytosis? provenance
- Which references are standard? provenance
Disease Disease and toxins.
Clinical.
Toxins
Toxins.
Toxins
Toxins.
- How do botulinum and tetanus toxins act on exocytosis, in general terms? provenance
- Which entry fits botulinum toxin? action
Disorders
Disorders.
Disorders
Disorders.
- What disorders involve defective exocytosis, such as in diabetes or immune deficiencies, in general terms? provenance
- Is the user asking about a personal condition, which needs a clinician? boundary
Context Methods and history.
Context.
Methods
Methods.
Methods
Methods.
- How is exocytosis studied with capacitance measurements, imaging and amperometry? provenance
- Which sources are cited? provenance
History
History.
History
History.
- How was exocytosis discovered, and what did the 2013 Nobel Prize recognise? provenance
- Which entry fits the history of cell biology? action
What the second pass must settle
- Should regulated exocytosis and degranulation be separate entries?
- How should cell biology references be linked?
- The registry entry has merged aliases naming specific forms; should they be split off?