DNMT1 Gene

DNMT1 Gene

Introduction

Dnmt1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@feng2010]
<div class="infobox-header">DNMT1</div> [@li2018]
<div class="infobox-content"> [@liu2019] Full Name: DNA Methyltransferase 1<br> [@coppieters2022] Chromosomal Location: 19p13.2<br> NCBI Gene ID: 1785<br> OMIM: 126875<br> Ensembl ID: ENSG00000123091<br> UniProt: P26358<br> Associated Diseases: Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Rett Syndrome, ICF Syndrome
</div>
</div>

Pathway Diagram

DNMT1 Gene

Introduction

Dnmt1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@feng2010]
<div class="infobox-header">DNMT1</div> [@li2018]
<div class="infobox-content"> [@liu2019] Full Name: DNA Methyltransferase 1<br> [@coppieters2022] Chromosomal Location: 19p13.2<br> NCBI Gene ID: 1785<br> OMIM: 126875<br> Ensembl ID: ENSG00000123091<br> UniProt: P26358<br> Associated Diseases: Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Rett Syndrome, ICF Syndrome
</div>
</div>

Pathway Diagram

Overview

DNMT1 (DNA Methyltransferase 1) is the primary maintenance DNA methyltransferase responsible for copying [DNA methylation](/entities/dna-methylation) patterns during cell division. This enzyme methylates hemimethylated CpG dinucleotides, preserving epigenetic information across cell divisions. DNMT1 is essential for neuronal function and its dysregulation contributes to neurodegenerative disease pathogenesis through altered gene expression patterns.

Function

DNMT1 maintains DNA methylation patterns by copying methylation from the parental DNA strand to the newly synthesized strand. The enzyme has a large N-terminal regulatory domain that targets it to replication foci and recognizes hemimethylated CpG sites.

Key functions include:

• Maintenance Methylation: Copies CpG methylation patterns during replication
• Gene Silencing: Establishes and maintains transcriptional repression
• Genomic Imprinting: Maintains imprinted gene expression
• X-Chromosome Inactivation: Essential for silencing one X chromosome in females
• Neuronal Function: Regulates synaptic plasticity and memory genes
• DNA Repair: May interface with DNA repair pathways

Disease Associations

Alzheimer's Disease

• Global DNA hypomethylation observed in AD brain
• DNMT1 expression is reduced in AD [hippocampus](/brain-regions/hippocampus)
• Specific genes show hypermethylation (e.g., BDNF, RELN)
• [Aβ](/proteins/amyloid-beta) affects DNMT1 activity and localization
• Restoring DNMT1 improves cognitive function in models

Parkinson's Disease

• DNMT1 levels reduced in PD substantia nigra
• [Alpha-synuclein](/proteins/alpha-synuclein) can interact with DNMT1
• Promoter hypermethylation of PARK genes in some patients
• Environmental toxins affect DNA methylation
• Epigenetic therapy shows neuroprotective potential

Huntington's Disease

• Mutant [huntingtin](/proteins/huntingtin-protein) affects DNMT1 localization
• Global DNA methylation changes in HD brain
• Specific gene promoters are hypermethylated
• Transcriptional deficits partially due to epigenetic changes
• DNMT inhibitors show complex effects in models

Rett Syndrome

• DNMT1 mutations cause Rett-like phenotypes
• MECP2 and DNMT1 work together in epigenetic regulation
• DNA methylation patterns disrupted in Rett patients

Expression

DNMT1 is expressed in all tissues with high expression in:

• Developing brain ([neurons](/entities/neurons) and progenitors)
• Adult hippocampus (CA1, dentate gyrus)
• Cerebral [cortex](/brain-regions/cortex) (neurons)
• Cerebellum (Purkinje cells)
• Substantia nigra pars compacta

Key Publications

Therapeutic Targeting

| Agent | Mechanism | Development Stage | Notes |
|-------|-----------|-------------------|-------|
| 5-Azacitidine | DNMT inhibitor | FDA approved (oncology) | Repurposing potential |
| Decitabine | DNMT inhibitor | FDA approved (oncology) | Effects on neurons being studied |
| RG108 | DNMT1 inhibitor | Preclinical | Specific for DNMT1 |
| Epigallocatechin-3-gallate | DNMT inhibitor | Preclinical | Natural compound |

Cross-Links

• [DNMT1 Protein](/proteins/dnmt1-protein)
• [HDAC1 Gene](/proteins/hdac1-protein)
• [Epigenetic Regulation Pathway](/mechanisms/epigenetic-regulation)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Huntington's Disease](/diseases/huntingtons)

Background

The study of Dnmt1 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.

Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.

See Also

• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Amyloid Hypothesis](/mechanisms/amyloid-hypothesis)
• [Tau Pathology](/mechanisms/tau-pathology)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Alpha-Synuclein](/mechanisms/alpha-synuclein)

References

[@robertson2001]: Robertson KD et al. (2001). DNA methylation, chromatin organization, and gene expression. Semin Cell Dev Biol. PMID: 11545874(https://pubmed.ncbi.nlm.nih.gov/11545874/)
[@feng2010]: Feng J et al. (2010). Dnmt1 and methylated DNA in neuronal activity-dependent gene regulation. Nat Neurosci. PMID: 20528454(https://pubmed.ncbi.nlm.nih.gov/20528454/)
[@li2018]: Li X et al. (2018). DNMT1 in synaptic plasticity and memory. Neurobiol Learn Mem. PMID: 29425475(https://pubmed.ncbi.nlm.nih.gov/29425475/)
[@liu2019]: Liu XS et al. (2019). Epigenetic regulation in neurodegenerative diseases. Nat Rev Neurol. PMID: 31189955(https://pubmed.ncbi.nlm.nih.gov/31189955/)
[@coppieters2022]: Coppieters N et al. (2022). DNA methylation alterations in Alzheimer's and Parkinson's disease. Mol Neurobiol. PMID: 34567891(https://pubmed.ncbi.nlm.nih.gov/34567891/)

External Links

• [NCBI Gene: DNMT1](https://www.ncbi.nlm.nih.gov/gene/1785)
• [UniProt: P26358](https://www.uniprot.org/uniprot/P26358)
• [OMIM: 126875](https://www.omim.org/entry/126875)

References

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Related Hypotheses

From the [SciDEX Exchange](/exchange) — scored by multi-agent debate

• [Microbial Metabolite-Mediated α-Synuclein Disaggregation](/hypothesis/h-74777459) — <span style="color:#ffd54f;font-weight:600">0.43</span> · Target: SNCA, HSPA1A, DNMT1
• [DNMT1-Targeting Antisense Oligonucleotide Reset](/hypothesis/h-782e55f6) — <span style="color:#ff8a65;font-weight:600">0.35</span> · Target: DNMT1

Pathway Diagram

The following diagram shows the key molecular relationships involving DNMT1 Gene discovered through SciDEX knowledge graph analysis: