DNA methylation
Let an agent explain DNA methylation and its roles, relay mechanisms, enzymes, measurement and significance from molecular biology references, describe its dynamics in development and disease in general terms, and distinguish DNA methylation from histone modification, RNA methylation and genetic mutation.
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 DNA methylation and its roles, relay mechanisms, enzymes, measurement and significance from molecular biology references, describe its dynamics in development and disease in general terms, and distinguish DNA methylation from histone modification, RNA methylation and genetic mutation.
The addition of methyl groups to DNA, mainly at cytosine in CpG sites in mammals and also at adenine in bacteria and some eukaryotes, an epigenetic mark that regulates gene expression, genomic imprinting, X inactivation and transposon silencing, reprogrammed during gamete generation and embryo development and altered in cancer and ageing; DNA methylation is measured by bisulfite sequencing and related methods and underlies epigenetic clocks.
What it is for: Not applicable; an epigenetic process.
It can be explain mechanisms; relay measurement and roles; describe development and disease; distinguish related modifications.
Distinguishing features
Epigenetic mark
Heritable through division
Reprogrammed in development
Disease relevance
What it looks like
Not a visible object; methyl groups on DNA bases.
Physical character
mammalian CpG methylation: about 70-80 percent - of CpGs
main enzymes: DNMT1, DNMT3A, DNMT3B list
demethylation enzymes: TET family list
How it is recognised
Methyl groups added to DNA bases
Cytosine methylation at CpG, adenine methylation, methylation in gamete generation and embryo development
Histone modification marks proteins; RNA methylation marks RNA; mutations change sequence
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is a kind of - in registry terms
is contrasted with - another epigenetic mark
In practice
Families and kinds
cytosine methylation at CpG sites
non-CpG methylation in neurons and stem cells
adenine methylation in bacteria and some eukaryotes
methylation dynamics in gamete generation
methylation dynamics in embryo development
aberrant methylation in cancer and ageing
Identifiers
GO GO:0006306 DNA methylation
Standards and regulation
No regulation; standards for methylation assays and clinical tests
Failure modes and hazards
Overinterpreting epigenetic clocks and direct-to-consumer tests
Agents giving personal medical advice
Confusing methylation with mutation
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 DNA methylation is.
Science.
Definition
Definition.
Definition
Definition.
- What is DNA methylation, and how does it differ from histone modification, RNA methylation and mutation? definition
- Is the question about the mechanism, development, disease or a personal test? boundary
Forms
Forms.
Forms
Forms.
- What are cytosine and adenine methylation, and what are the GO subprocesses for gametes and embryos? definition
- Which entry fits the specific form? action
Mechanism Mechanism and measurement.
Science.
Enzymes
Enzymes.
Enzymes
Enzymes.
- How do DNMT and TET enzymes add, maintain and remove methylation? provenance
- Which references are standard? provenance
Measurement
Measurement.
Measurement
Measurement.
- How is methylation measured by bisulfite sequencing, arrays and nanopore methods? measurement
- Which sources are cited? provenance
Biology Development and disease.
Clinical.
Development
Development.
Development
Development.
- How is methylation reprogrammed in gametes and embryos, and how does it drive imprinting and X inactivation? provenance
- Which entry fits genomic imprinting? action
Disease
Disease and ageing.
Disease
Disease.
- How is methylation altered in cancer and ageing, and what are epigenetic clocks, with findings attributed? provenance
- Is the user asking about a personal test result, which needs a clinician? boundary
Context Evolution and history.
Context.
Evolution
Across life.
Evolution
Evolution.
- How does methylation differ across bacteria, plants and animals? provenance
- Which entry fits epigenetics? action
History
History.
History
History.
- How was DNA methylation discovered and its role established? provenance
- Which entry fits the history of epigenetics? action
What the second pass must settle
- Should epigenetic clock and genomic imprinting be separate primary entries?
- How should molecular biology references be linked?
- The registry entry has merged aliases naming GO subprocesses; should they be split off?