lysosome
Let an agent explain lysosomes and their functions, relay structure, formation and enzymes from cell biology references, describe lysosomal storage diseases in general terms, and distinguish lysosomes from related organelles.
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 lysosomes and their functions, relay structure, formation and enzymes from cell biology references, describe lysosomal storage diseases in general terms, and distinguish lysosomes from related organelles.
A membrane-bound organelle in animal cells containing acid hydrolases that digest macromolecules, worn-out organelles and material taken up by endocytosis and autophagy, formed from the Golgi apparatus as primary lysosomes and maturing into secondary lysosomes and endolysosomes after fusion with endosomes or autophagosomes, with specialised forms such as cytolytic granules in killer lymphocytes and mast cell granules; lysosomes act in recycling, signalling and nutrient sensing, and their defects cause lysosomal storage diseases.
What it is for: Not applicable; a cell organelle.
It can be explain structure and function; relay formation and enzymes; describe related diseases; distinguish from other organelles.
Distinguishing features
Acidic lumen
Acid hydrolases
Degradation and recycling
Signalling role
What it looks like
Not a visible object; small dense vesicles seen by electron microscopy.
Physical character
internal pH: about 4.5-5 value
diameter: about 0.1-1.2 micrometres
acid hydrolases: about 60 count
How it is recognised
Acidic digestive organelle of animal cells
Primary and secondary lysosomes, endolysosomes, cytolytic and mast cell granules, megasomes
Peroxisomes handle oxidation; vacuoles are the plant and fungal equivalents; endosomes sort cargo
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is formed from - and endosomes
is defective in - when enzymes are missing
In practice
Families and kinds
primary lysosomes
secondary lysosomes and endolysosomes
autolysosomes
lysosome-related organelles such as cytolytic granules, mast cell granules and melanosomes
megasomes in some cells
lytic vacuoles in plants and fungi
Identifiers
GO GO:0005764 lysosome
MeSH D008247 lysosomes
Standards and regulation
No regulation; standard cell biology definitions
Clinical guidelines for lysosomal storage diseases
Failure modes and hazards
Confusing lysosomes with peroxisomes or vacuoles
Oversimplifying formation pathways
Agents giving personal medical advice about storage diseases
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 a lysosome is.
Science.
Definition
Definition and structure.
Definition
Definition.
- What is a lysosome, and how do its membrane, proton pumps and enzymes work? definition
- Is the question about lysosomes, peroxisomes, vacuoles or endosomes? boundary
Kinds
Kinds and formation.
Kinds
Kinds.
- How do primary lysosomes, secondary lysosomes, endolysosomes and lysosome-related granules form and differ? definition
- Which entry fits the specific kind? action
Function Functions.
Science.
Degradation
Degradation and recycling.
Degradation
Degradation.
- How do lysosomes digest material from endocytosis, phagocytosis and autophagy? provenance
- Which references are standard? provenance
Signalling
Signalling and sensing.
Signalling
Signalling.
- How do lysosomes act in nutrient sensing through mTOR, and in secretion and immunity? provenance
- Which entry fits autophagy? action
Disease Disease.
Clinical.
Storage
Lysosomal storage diseases.
Storage
Storage.
- What are lysosomal storage diseases such as Gaucher and Tay-Sachs, in general terms? provenance
- Is the user asking about their own or a family diagnosis, which needs a specialist? boundary
Therapy
Therapies and research.
Therapy
Therapy.
- How do enzyme replacement and other therapies work, and what research targets lysosomes in cancer and neurodegeneration? provenance
- Which sources are cited? provenance
Context History and methods.
Context.
History
History.
History
History.
- How did Christian de Duve discover lysosomes, and how has the field developed? provenance
- Which entry fits the history of cell biology? action
Methods
Methods.
Methods
Methods.
- How are lysosomes studied by microscopy, fractionation and markers? provenance
- Which entry fits cell fractionation? action
What the second pass must settle
- Should lysosomal storage disease and autophagy be separate primary entries?
- How should cell biology references be linked?
- The registry entry has merged aliases naming granules and stages; should they be split off?