GO:0032453 histone H3K4 demethylase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032453 (histone H3K4 demethylase activity) is a molecular function that removes methyl groups from lysine 4 of histone H3, reversing a key activating chromatin mark.
• This activity is carried out by two major enzyme families: flavin-dependent amine oxidases (LSD1/KDM1A) and JmjC-domain-containing dioxygenases (KDM5A-D, KDM6A/UTX) [1,7].
• H3K4 demethylases regulate gene expression, development, and stress responses, and their dysregulation is linked to cancer, immune evasion, and viral reactivation [2,4,5].
• KDM5B recruits SETDB1 to silence retroelements and promotes immune evasion in cancer, while UTX condensation underlies its tumour-suppressive activity.
• In plants, H3K4 demethylases such as JMJ17 and JMJ16 control dehydration stress and leaf senescence, showing conserved roles in environmental responses [3,6].
• Studying this activity requires integrating CRISPR knockout/knock-in models, demethylase activity assays, and transcriptomic or epigenomic profiling [1,8].
Description
Histone H3 lysine 4 (H3K4) methylation is a well-established mark of active transcription, and its removal is catalyzed by histone H3K4 demethylases, which are classified under the Gene Ontology molecular function term GO:0032453 (histone H3K4 demethylase activity). This enzymatic activity is essential for dynamic regulation of chromatin states, allowing cells to switch genes on and off in response to developmental and environmental cues [1,7]. Because H3K4 methylation is associated with promoters and enhancers, its demethylation directly impacts gene expression programs that control cell fate, proliferation, and stress responses [1,4]. The importance of GO:0032453 extends to human disease: mutations or altered expression of H3K4 demethylases such as KDM5C, KDM5B, and KDM6A are observed in various cancers and developmental disorders [4,5,7]. In plants, H3K4 demethylases like JMJ17 and JMJ16 modulate dehydration stress and leaf senescence, highlighting the evolutionary conservation of this activity [3,6]. Researchers studying chromatin biology, cancer epigenetics, and gene regulation therefore require reliable tools to manipulate and measure H3K4 demethylase function [1,8].
histone H3K4 demethylase activity At A Glance
| GO ID | GO:0032453 |
|---|---|
| GO term | histone H3K4 demethylase activity |
| Ontology | molecular_function |
| Synonym | histone demethylase activity (H3-K4 specific); histone demethylase activity (H3K4-specific); histone H3-K4 demethylase activity; histone H3-methyl-lysine-4 demethylase activity |
| Major function | Catalysis of the removal of a methyl group from a modified lysine residue at position 4 of the histone H3 protein |
| Enzyme families | FAD-dependent amine oxidases (e.g., LSD1/KDM1A) and JmjC-domain dioxygenases (e.g., KDM5A-D, KDM6A/UTX) |
| Cofactors | FAD for amine oxidases; Fe(II) and 2-oxoglutarate for JmjC enzymes |
| Substrate | Mono-, di-, or tri-methylated histone H3 at lysine 4 |
| Biological context | Transcriptional regulation, development, stress response, and disease |
What Is GO:0032453?
GO:0032453, histone H3K4 demethylase activity, is defined as the catalysis of the removal of a methyl group from a modified lysine residue at position 4 of the histone H3 protein. This activity reverses the mono-, di-, or tri-methylation of H3K4, thereby erasing a mark that is typically associated with active transcription [1,7]. The reaction is carried out by two structurally distinct classes of enzymes: flavin adenine dinucleotide (FAD)-dependent amine oxidases, such as LSD1 (KDM1A), and JmjC-domain-containing iron(II)/2-oxoglutarate-dependent dioxygenases, including the KDM5 family and UTX (KDM6A) [1,7]. By removing methyl groups, these enzymes contribute to the dynamic equilibrium of histone methylation and play critical roles in gene silencing, cellular differentiation, and disease [1,4,5].
Why Is histone H3K4 demethylase activity Important in Cell Biology?
Histone H3K4 demethylase activity (GO:0032453) is crucial because it provides the enzymatic counterbalance to H3K4 methylation, a hallmark of active chromatin. By removing methyl groups, these enzymes enable precise temporal and spatial control of gene expression, which is essential for normal development and cellular homeostasis [1,7]. Dysregulation of H3K4 demethylases has been implicated in a wide range of pathologies, including cancer, immune evasion, and viral infections [2,4,5]. For example, KDM5B promotes immune evasion by recruiting SETDB1 to silence retroelements, and UTX condensation is linked to its tumour-suppressive function. In plants, H3K4 demethylases regulate dehydration stress and senescence, underscoring their broad biological significance [3,6]. Therefore, understanding GO:0032453 is fundamental for both basic chromatin research and therapeutic development [1,8].
• Reverses H3K4 methylation, a key activating histone mark, to fine-tune gene expression.
• Regulates developmental processes and cell fate decisions through dynamic chromatin remodeling [1,7].
• Implicated in cancer: KDM5B promotes immune evasion by silencing retroelements.
• UTX (KDM6A) condensation underlies its tumour-suppressive activity.
• Involved in viral infection: LSD1 complex restricts Epstein-Barr virus lytic reactivation.
• Modulates plant stress responses: JMJ17 functions in dehydration stress.
• Controls leaf senescence in Arabidopsis via JMJ16.
• Provides targets for epigenetic therapies, such as LSD1 PROTAC degraders.
• Essential for understanding crosstalk between histone demethylation and hypoxic reprogramming in cancer metabolism.
• Enables researchers to study chromatin dynamics using CRISPR and biochemical assays [1,8].
What Happens During histone H3K4 demethylase activity?
Substrate recognition and binding
In simple terms: The enzyme finds and binds to the methylated histone H3 tail.
Histone H3K4 demethylases recognize the N-terminal tail of histone H3, specifically when lysine 4 carries one, two, or three methyl groups. This binding is mediated by conserved domains, such as the JmjC domain in KDM5 enzymes or the amine oxidase domain in LSD1 [1,7]. The interaction often requires additional chromatin context, including DNA or partner proteins, to achieve specificity.
Catalytic demethylation
In simple terms: The enzyme chemically removes the methyl group from the lysine.
For FAD-dependent amine oxidases like LSD1, the methyl group is removed via an oxidation reaction that generates formaldehyde and an unmodified lysine. JmjC-domain enzymes, such as KDM5A-D and UTX, use Fe(II) and 2-oxoglutarate to hydroxylate the methyl group, leading to its release as formaldehyde and succinate [1,7]. Both mechanisms result in the demethylation of H3K4, effectively erasing the mark.
Product release and chromatin remodeling
In simple terms: After demethylation, the chromatin environment changes.
Following demethylation, the enzyme releases the modified histone and the byproducts. The loss of H3K4 methylation can lead to recruitment of repressive complexes, such as SETDB1, which further silence target genes. This process is often coupled with changes in chromatin accessibility and transcriptional output [1,5].
Regulation of enzyme activity
In simple terms: The enzyme's activity is controlled by various factors.
H3K4 demethylase activity is regulated at multiple levels, including post-translational modifications, protein-protein interactions, and metabolic cofactor availability [1,7]. For instance, UTX condensation into phase-separated compartments modulates its tumour-suppressive activity. In cancer, hypoxic conditions can reprogram metabolism and influence demethylase function.
Key Genes Involved in GO:0032453 histone H3K4 demethylase activity
The following genes encode proteins with histone H3K4 demethylase activity (GO:0032453) or are directly involved in its regulation, as supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| KDM1A (LSD1) | FAD-dependent H3K4 demethylase | Target for epigenetic therapy; PROTAC degraders under study |
| KDM5A (JARID1A) | JmjC-domain H3K4 demethylase | Implicated in cancer and transcriptional regulation [1,7] |
| KDM5B (JARID1B) | JmjC-domain H3K4 demethylase | Promotes immune evasion by silencing retroelements |
| KDM5C (JARID1C) | JmjC-domain H3K4 demethylase | Cancer driver gene; crosstalk with hypoxic reprogramming |
| KDM5D (JARID1D) | JmjC-domain H3K4 demethylase | Y-linked homolog; potential roles in cancer |
| KDM6A (UTX) | JmjC-domain H3K4/H3K27 demethylase | Tumour-suppressive activity via condensation |
| KDM6B (JMJD3) | JmjC-domain H3K27 demethylase | Related to H3K4 demethylation in some contexts |
| JMJ17 | Plant H3K4 demethylase | Functions in dehydration stress response |
| JMJ16 | Plant H3K4 demethylase | Represses leaf senescence |
| SETDB1 | Histone methyltransferase recruited by KDM5B | Silences retroelements in immune evasion |
| IDH1 | Metabolic enzyme producing 2-oxoglutarate | Crosstalk with histone demethylation in cancer |
| IDH2 | Metabolic enzyme producing 2-oxoglutarate | Crosstalk with histone demethylation in cancer |
| EBV proteins | Viral factors interacting with LSD1 complex | Restricts lytic reactivation |
| LSD1 complex components | Corepressors (e.g., CoREST) | Modulate demethylase specificity |
| H3K4me3 readers | Effector proteins binding methylated H3K4 | Oppose demethylase function |
| JmjC domain proteins | Family of dioxygenases | Broad roles in chromatin regulation [1,7] |
| FAD-dependent oxidases | Enzyme class including LSD1 | Targets for small-molecule inhibitors |
How Is histone H3K4 demethylase activity Regulated?
Histone H3K4 demethylase activity is regulated through multiple mechanisms. The availability of cofactors such as FAD, Fe(II), and 2-oxoglutarate directly influences enzymatic rates, linking demethylation to cellular metabolism [1,7]. Post-translational modifications and protein-protein interactions, such as the recruitment of SETDB1 by KDM5B, modulate substrate specificity and targeting. In cancer, hypoxic conditions can reprogram metabolic pathways that affect demethylase function, creating crosstalk between oxygen sensing and chromatin regulation. Additionally, phase separation of UTX into condensates regulates its activity and tumour-suppressive function. In plants, environmental stresses like dehydration induce JMJ17 expression, demonstrating transcriptional control of demethylase genes.
histone H3K4 demethylase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| KDM5B | Cancer immune evasion | Knockout melanoma or breast cancer cell lines; syngeneic mouse models |
| UTX (KDM6A) | Tumour suppression | Knockout and knock-in of condensation-deficient mutants in cancer cells |
| KDM5C | Cancer metabolism and hypoxia | Point mutations in IDH1/2 and KDM5C in cell lines under hypoxia |
| LSD1 (KDM1A) | EBV lytic reactivation | Knockout or degron-based depletion in EBV-positive cells |
| JMJ17 | Dehydration stress in plants | Arabidopsis knockout and overexpression lines |
Cancer and immune evasion
Dysregulation of H3K4 demethylases is frequently observed in cancer. KDM5B promotes immune evasion by recruiting SETDB1 to silence retroelements, thereby preventing immune recognition of tumour cells. UTX (KDM6A) acts as a tumour suppressor, and its condensation into phase-separated compartments is critical for this activity. Mutations in KDM5C and other demethylases are linked to cancer metabolism and hypoxic reprogramming. Targeting these enzymes, for example with LSD1 PROTAC degraders, represents a promising therapeutic strategy.
Viral infections
The LSD1 complex, which possesses H3K4 demethylase activity, restricts Epstein-Barr virus (EBV) lytic reactivation. This suggests that pharmacological modulation of H3K4 demethylation could influence viral latency and reactivation, with implications for EBV-associated malignancies.
Plant stress and senescence
In Arabidopsis, the H3K4 demethylase JMJ17 functions in dehydration stress response, while JMJ16 represses leaf senescence [3,6]. These findings highlight conserved roles of H3K4 demethylation in environmental adaptation and aging-like processes, offering insights into crop improvement [3,6].
From histone H3K4 demethylase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of KDM5B affect retroelement silencing and immune evasion? | KDM5B knockout cancer cell lines and mouse models |
| How does UTX condensation regulate tumour suppression? | Knock-in of condensation-deficient UTX mutants |
| What is the role of LSD1 in EBV latency? | LSD1 knockout or PROTAC degradation in EBV-infected cells [2,8] |
| How does JMJ17 mediate dehydration stress? | Arabidopsis jmj17 knockout and overexpression lines |
| Does KDM5C mutation alter hypoxic reprogramming? | Point mutation knock-in of KDM5C in cancer cells |
| Can LSD1 degraders suppress tumour growth? | Xenograft models treated with LSD1 PROTAC |
How to Study the histone H3K4 demethylase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Demethylase activity assay | Enzymatic removal of methyl groups | Validation of enzyme function and inhibitor screening [1,8] |
| ChIP-seq | Genome-wide localization of histone marks | Mapping H3K4me3 changes after demethylase KO [1,4] |
| RNA-seq | Transcriptional changes | Identifying pathways regulated by demethylases [3,5] |
| Mass spectrometry | Protein interactions and modifications | Identifying LSD1 complex components |
| Western blot | Protein expression and histone methylation levels | Confirming knockout efficiency and global H3K4me3 levels |
| Immunofluorescence | Subcellular localization and condensation | Visualizing UTX condensates |
| CRISPR screening | Functional genomics | Identifying synthetic lethal interactions with demethylase loss |
| Proteolysis-targeting chimeras (PROTACs) | Induced protein degradation | Evaluating LSD1 degradation efficacy |
Demethylase activity assays
Direct measurement of H3K4 demethylase activity can be performed using recombinant enzymes or immunoprecipitated complexes with methylated histone substrates, followed by detection of formaldehyde release or mass spectrometry. These assays are essential for validating enzyme function and screening inhibitors.
Chromatin immunoprecipitation and sequencing (ChIP-seq)
ChIP-seq for H3K4 methylation marks (e.g., H3K4me3) allows genome-wide mapping of changes upon demethylase manipulation [1,4]. This method reveals target genes and retroelements silenced by KDM5B-SETDB1 complexes.
Transcriptomics (RNA-seq)
RNA-seq quantifies gene expression changes following knockout, knockdown, or overexpression of H3K4 demethylases [3,5]. It is used to identify pathways affected by JMJ17 in stress responses or UTX in tumour suppression [3,5].
Proteomics and interactomics
Affinity purification coupled with mass spectrometry identifies protein partners of demethylases, such as the LSD1 complex components. This helps elucidate how demethylases are targeted to specific chromatin regions.
How CRISPR Can Be Used to Study GO:0032453 histone H3K4 demethylase activity
Knockout
CRISPR knockout of H3K4 demethylase genes (e.g., KDM5B, KDM1A) is used to study loss-of-function phenotypes, such as changes in gene expression, retroelement silencing, and tumour growth [4,8]. Knockout cell lines provide a clean background for rescue experiments and drug sensitivity testing.
Point Mutation
Point mutations in catalytic residues or regulatory domains of demethylases can be introduced via CRISPR to dissect enzymatic versus non-enzymatic functions [5,7]. For example, mutations affecting UTX condensation or KDM5C catalytic activity help clarify their roles in cancer [5,7].
Knock-in
Knock-in of tagged or mutant demethylase alleles (e.g., GFP-UTX) allows visualization and biochemical purification of the enzyme in its native context. This approach is valuable for studying phase separation and interactome dynamics.
Overexpression
CRISPR activation (CRISPRa) or transgenic overexpression of H3K4 demethylases (e.g., JMJ17 in plants) is used to test gain-of-function effects on stress tolerance, senescence, or tumorigenesis [3,6]. Overexpression models complement knockout studies to establish causality.
How EDITGENE Supports histone H3K4 demethylase activity Research
Researchers studying histone H3K4 demethylase activity-related genes often need to determine whether a candidate gene is causally involved in a specific phenotype, such as cancer immune evasion or stress response. This requires precise genetic manipulation and functional validation, which can be achieved through CRISPR-based cell models and screening services.
Contact EDITGENE today to design your custom CRISPR model for histone H3K4 demethylase activity research.
Frequently Asked Questions About histone H3K4 demethylase activity
What is histone H3K4 demethylase activity?
It is the enzymatic removal of methyl groups from lysine 4 of histone H3, classified as GO:0032453.
What genes are involved in histone H3K4 demethylase activity?
Key genes include KDM1A (LSD1), KDM5A-D, KDM6A (UTX), and plant JMJ17/JMJ16 [1,3,6,7].
Which enzymes have H3K4 demethylase activity?
FAD-dependent amine oxidases like LSD1 and JmjC-domain dioxygenases such as KDM5 family and UTX [1,7].
How is H3K4 demethylation linked to cancer?
KDM5B promotes immune evasion by silencing retroelements, and UTX acts as a tumour suppressor [4,5].
What is the role of LSD1 in viral infection?
The LSD1 complex restricts Epstein-Barr virus lytic reactivation.
Can H3K4 demethylases be targeted therapeutically?
Yes, LSD1 PROTAC degraders suppress tumour growth in preclinical models.
What methods study H3K4 demethylase activity?
Demethylase assays, ChIP-seq, RNA-seq, and proteomics are commonly used [1,2,4].
How do plant H3K4 demethylases function?
JMJ17 mediates dehydration stress response and JMJ16 represses leaf senescence [3,6].
What are the cofactors for H3K4 demethylases?
FAD for LSD1; Fe(II) and 2-oxoglutarate for JmjC enzymes [1,7].
How can CRISPR help study H3K4 demethylases?
CRISPR knockout, knock-in, and overexpression models enable functional dissection [4,5,8].
Conclusion
Histone H3K4 demethylase activity (GO:0032453) is a fundamental molecular function that reverses the activating H3K4 methylation mark, thereby shaping gene expression programs in health and disease. Its roles span cancer immune evasion, viral latency, plant stress responses, and development, making it a compelling target for basic and translational research [2,3,4,5,6,7]. Advances in CRISPR-based models and epigenomic tools now allow precise interrogation of these enzymes, promising new insights and therapeutic opportunities [1,8].
References
- 1. Gold S et al.. 2024. Epigenetic therapies targeting histone lysine methylation: complex mechanisms and clinical challenges.. J Clin Invest 134(20) PMID: 39403928
- 2. Liao Y et al.. 2025. Lysine-specific histone demethylase complex restricts Epstein-Barr virus lytic reactivation.. Nat Microbiol 10(12):3290-3304 PMID: 41174223
- 3. Huang S et al.. 2019. Arabidopsis histone H3K4 demethylase JMJ17 functions in dehydration stress response.. New Phytol 223(3):1372-1387 PMID: 31038749
- 4. Zhang SM et al.. 2021. KDM5B promotes immune evasion by recruiting SETDB1 to silence retroelements.. Nature 598(7882):682-687 PMID: 34671158
- 5. Shi B et al.. 2021. UTX condensation underlies its tumour-suppressive activity.. Nature 597(7878):726-731 PMID: 34526716
- 6. Liu P et al.. 2019. The Histone H3K4 Demethylase JMJ16 Represses Leaf Senescence in Arabidopsis.. Plant Cell 31(2):430-443 PMID: 30712008
- 7. Chang S et al.. 2019. The cancer driver genes IDH1/2, JARID1C/ KDM5C, and UTX/ KDM6A: crosstalk between histone demethylation and hypoxic reprogramming in cancer metabolism.. Exp Mol Med 51(6):1-17 PMID: 31221981
- 8. Zhai D et al.. 2025. LD-110, a potent LSD1 PROTAC degrader, suppresses tumor growth by inducing ER stress and apoptosis.. Sci Bull (Beijing) 70(23):4046-4060 PMID: 41188178
