GO:0044022 histone H3S28 kinase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0044022 describes the enzymatic activity that transfers a phosphate group from ATP to serine 28 of histone H3, producing phospho-H3S28.
• H3S28 phosphorylation is a hallmark of the transcriptional response to cellular stress and mitogenic signals.
• Multiple kinases can catalyse this reaction, including MSK1/2, Aurora B, JNK, and CaMKII, depending on cell context.
• H3S28 phosphorylation is functionally linked to H3K27 acetylation and can displace Polycomb repressive complexes to activate gene expression.
• Dysregulation of H3S28 phosphorylation contributes to oncogene-induced senescence, osteosarcoma autophagy, and cardiac gene regulation.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are essential to dissect the causal roles of H3S28 kinases in disease.
Description
Histone H3 serine 28 (H3S28) phosphorylation is a dynamic chromatin modification that serves as a molecular switch during transcription, cell cycle progression, and stress responses. The enzyme responsible for this modification, histone H3S28 kinase, catalyses the transfer of a phosphate group from ATP to serine 28 of histone H3, and is classified under the Gene Ontology term GO:0044022. This activity is distinct from other histone H3 kinases because it targets a specific residue that is adjacent to the well-studied H3S10 and H3K27 positions, integrating signals from multiple signalling cascades. Researchers study histone H3S28 kinase activity because it provides a direct mechanistic link between extracellular signals and immediate-early gene activation. For example, mitogen stimulation leads to distinct epialleles that are phosphorylated at either H3S10 or H3S28, depending on the acetylation status of H3K27. In cellular stress, H3S28 phosphorylation is a hallmark of the transcriptional response, enabling rapid induction of stress-responsive genes. The kinase activity is also implicated in oncogene-induced senescence through MSK1-mediated expression of the INK4AB/ARF locus, and in cardiac hemoglobin expression upon sympathetic activation via CaMKII. Given its central role in signal transduction to chromatin, GO:0044022 is a focal point for understanding how epigenetic enzymes translate environmental cues into gene expression programs. This article synthesises the current literature on the mechanism, key genes, disease relevance, and research methods for studying histone H3S28 kinase activity, with a focus on CRISPR-based models for functional validation.
histone H3S28 kinase activity At A Glance
| GO ID | GO:0044022 |
|---|---|
| GO term | histone H3S28 kinase activity |
| Ontology | molecular_function |
| Synonym | histone kinase activity (H3-S28 specific); histone serine kinase activity (H3-S28 specific); histone-serine kinase activity (H3-S28 specific) |
| Major function | Catalyses phosphorylation of histone H3 at serine 28 using ATP |
| Reaction | histone H3-serine (position 28) + ATP = histone H3-phosphoserine (position 28) + ADP |
| Substrate | Histone H3 serine 28 |
| Product | Phospho-H3S28 (histone H3-phosphoserine 28) |
| Cofactor | ATP (as phosphate donor) |
What Is GO:0044022?
GO:0044022, histone H3S28 kinase activity, is defined as the catalysis of the reaction: histone H3-serine (position 28) + ATP = histone H3-phosphoserine (position 28) + ADP. This reaction is the addition of a phosphate group to the serine residue at position 28 of histone H3. The term is a molecular function in the Gene Ontology and includes synonyms such as histone kinase activity (H3-S28 specific), histone serine kinase activity (H3-S28 specific), and histone-serine kinase activity (H3-S28 specific).
Why Is histone H3S28 kinase activity Important in Cell Biology?
Histone H3S28 kinase activity is important because it directly couples signal transduction pathways to chromatin remodelling and gene expression. Phosphorylation of H3S28 is a rapid and reversible mark that is associated with transcriptional activation in response to stress, mitogens, and developmental cues. It can also antagonise Polycomb-mediated repression by preventing the binding of PRC2 and Ring1B to chromatin, thereby facilitating gene activation. Dysregulation of this activity has been linked to cancer, senescence, and cardiac dysfunction, making it a potential target for therapeutic intervention.
• Acts as a hallmark of the transcriptional response to cellular stress, enabling rapid gene induction.
• Integrates mitogenic signals by generating distinct H3S10 or H3S28 phospho-epialleles depending on H3K27 acetylation.
• Promotes oncogene-induced senescence through MSK1-dependent activation of the INK4AB/ARF locus.
• Regulates autophagy in osteosarcoma cells via PCAF-mediated H3 phosphorylation.
• Controls cardiac hemoglobin expression upon sympathetic activation through CaMKII.
• Facilitates active promoter regulation in quiescent lymphocytes by Aurora B and Ring1B.
• Mediates formaldehyde-induced proto-oncogene expression via JNK-dependent H3 phosphorylation.
• Serves as a key node for crosstalk between histone phosphorylation and acetylation.
• Provides a mechanistic link between environmental exposures and epigenetic changes.
• Represents a druggable target for modulating stress-responsive and oncogenic transcriptional programs.
What Happens During histone H3S28 kinase activity?
Signal-induced recruitment of H3S28 kinases
In simple terms: When a cell receives a signal, specific enzymes are called to the chromatin to modify histone H3.
In response to mitogens or stress, signalling cascades activate kinases such as MSK1/2, JNK, or CaMKII, which then translocate to the nucleus and associate with chromatin regions containing target genes. This recruitment is often dependent on prior histone modifications, such as H3K27 acetylation, which can dictate whether H3S10 or H3S28 becomes phosphorylated.
Catalytic transfer of phosphate to H3S28
In simple terms: The kinase enzyme attaches a phosphate group to a specific spot on histone H3.
Once bound to chromatin, the kinase catalyses the transfer of the gamma-phosphate from ATP to the hydroxyl group of serine 28 on histone H3, yielding phospho-H3S28 and ADP. This reaction is highly specific for serine 28, distinguishing it from other H3 kinases that target serine 10 or threonine 3.
Chromatin remodelling and transcriptional activation
In simple terms: The new phosphate tag loosens chromatin and helps turn on genes.
Phosphorylation of H3S28 can disrupt the binding of repressive complexes such as Polycomb repressive complex 1 (PRC1) and PRC2, leading to a more open chromatin state and increased transcription. It also serves as a docking site for reader proteins that recruit transcriptional co-activators, thereby promoting the expression of immediate-early and stress-responsive genes.
Crosstalk with other histone modifications
In simple terms: The phosphate tag communicates with other chemical marks on histones to fine-tune gene activity.
H3S28 phosphorylation is functionally linked to H3K27 acetylation; acetylation at K27 can inhibit H3S28 phosphorylation or redirect kinases to H3S10, creating distinct epialleles that have different transcriptional outcomes. Additionally, H3S28 phosphorylation can be influenced by prior phosphorylation at H3S10, and together these marks coordinate the recruitment of 14-3-3 proteins and other chromatin modifiers.
Key Genes Involved in GO:0044022 histone H3S28 kinase activity
The following genes and proteins are directly implicated in histone H3S28 kinase activity or its regulation, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| MSK1 (RPS6KA5) | Stress-activated kinase that phosphorylates H3S28 | Triggers INK4AB/ARF expression in oncogene-induced senescence |
| MSK2 (RPS6KA4) | Kinase with overlapping function to MSK1 | May compensate for MSK1 in H3S28 phosphorylation |
| Aurora B (AURKB) | Mitotic kinase that phosphorylates H3S28 | Regulates active promoters in quiescent lymphocytes |
| JNK (MAPK8/9/10) | Stress-activated kinase upstream of H3S28 phosphorylation | Mediates formaldehyde-induced proto-oncogene expression |
| CaMKII (CAMK2A/B/D/G) | Calcium/calmodulin-dependent kinase | Regulates cardiac hemoglobin expression upon sympathetic activation |
| PCAF (KAT2B) | Histone acetyltransferase that promotes H3 phosphorylation | Regulates autophagy in osteosarcoma cells |
| Ring1B (RNF2) | Polycomb repressive complex 1 component | Combines with Aurora B to regulate active promoters |
| JIL-1 | Drosophila H3S10 kinase | Evidence against a role in H3S28 phosphorylation |
| H3F3A | Histone H3 variant 3.1 | Substrate for H3S28 phosphorylation |
| H3F3B | Histone H3 variant 3.2 | Substrate for H3S28 phosphorylation |
| HIST1H3A | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3B | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3C | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3D | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3E | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3F | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3G | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
| HIST1H3H | Replication-dependent histone H3 | Substrate for H3S28 phosphorylation |
How Is histone H3S28 kinase activity Regulated?
Histone H3S28 kinase activity is regulated at multiple levels. Upstream signalling pathways, including the p38/MAPK pathway that activates MSK1/2, the JNK pathway, and calcium signalling that activates CaMKII, control the activation and nuclear localisation of the kinases. Additionally, the activity can be modulated by prior histone modifications; for example, H3K27 acetylation influences whether H3S28 or H3S10 is phosphorylated upon mitogen stimulation. Protein-protein interactions with chromatin-associated factors such as Ring1B and 14-3-3 proteins also contribute to the regulation and targeting of H3S28 kinases.
histone H3S28 kinase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MSK1 (RPS6KA5) | Oncogene-induced senescence | Knockout in cancer cell lines (e.g., HeLa, MEFs) |
| PCAF (KAT2B) | Osteosarcoma autophagy | Overexpression and knockout in U2OS cells |
| CaMKII (CAMK2A) | Cardiac hemoglobin expression | Cardiomyocyte-specific knockout mice |
| Aurora B (AURKB) | Lymphocyte quiescence | Conditional knockout in T cells |
| JNK (MAPK8) | Formaldehyde-induced proto-oncogene expression | Knockout in HEK293 or A549 cells |
Cancer and oncogene-induced senescence
H3S28 phosphorylation is a critical mediator of oncogene-induced senescence. MSK1 triggers the expression of the INK4AB/ARF locus, leading to cell cycle arrest and senescence in response to oncogenic stress. In osteosarcoma cells, PCAF regulates H3 phosphorylation and promotes autophagy, suggesting a role in tumour cell survival. Additionally, formaldehyde-induced H3 phosphorylation via JNK leads to the expression of proto-oncogenes, linking environmental carcinogens to epigenetic activation of oncogenes.
Cardiac dysfunction and sympathetic activation
CaMKII regulates cardiac hemoglobin expression through histone phosphorylation upon sympathetic activation, indicating a role for H3S28 kinase activity in cardiac stress responses. Dysregulation of this pathway may contribute to cardiac hypertrophy and heart failure, making it a potential therapeutic target.
Lymphocyte quiescence and immune regulation
Aurora B and Ring1B combine to regulate active promoters in quiescent lymphocytes, highlighting a role for H3S28 phosphorylation in maintaining immune cell homeostasis. Disruption of this regulation could lead to aberrant lymphocyte activation or immunodeficiency.
From histone H3S28 kinase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does MSK1 kinase activity mediate oncogene-induced senescence? | MSK1 knockout cell lines (CRISPR KO) followed by oncogene induction |
| What is the effect of H3S28A point mutation on transcription? | Knock-in of H3S28A mutation in H3F3A gene |
| How does H3S28 phosphorylation affect chromatin binding of Polycomb? | Knock-in of phospho-mimetic H3S28D mutation |
| Can overexpression of CaMKII enhance cardiac hemoglobin expression? | Adenoviral overexpression of CaMKII in cardiomyocytes |
| What genes are regulated by JNK-mediated H3S28 phosphorylation? | JNK knockout with RNA-seq after formaldehyde exposure |
| Does Aurora B inhibition affect lymphocyte activation? | CRISPR knockout of AURKB in primary T cells |
How to Study the histone H3S28 kinase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| ChIP-seq | Genomic localisation of H3S28 phosphorylation | Mapping target genes in stress responses |
| Western blot | Global levels of phospho-H3S28 | Quantifying kinase activation after stimulation |
| Immunofluorescence | Spatial distribution of phospho-H3S28 | Visualising chromatin marks in single cells |
| In vitro kinase assay | Catalytic activity of candidate kinases | Validating MSK1, Aurora B, or CaMKII activity |
| CRISPR knockout screen | Genes required for H3S28 phosphorylation | Identifying novel regulators |
| RNA-seq | Transcriptional changes upon H3S28 modulation | Linking phosphorylation to gene expression |
| Mass spectrometry | Histone modification crosstalk | Detecting combinatorial marks on H3 tails |
| Proximity ligation assay | Protein-protein interactions at chromatin | Detecting kinase-chromatin associations |
Chromatin immunoprecipitation and sequencing (ChIP-seq)
ChIP-seq using antibodies specific for phospho-H3S28 can map the genomic distribution of this mark and correlate it with transcriptional activity. This method is essential for identifying target genes and understanding how H3S28 phosphorylation is targeted to specific loci.
Western blotting and immunofluorescence
Western blotting with anti-phospho-H3S28 antibodies allows quantification of global H3S28 phosphorylation levels in response to stimuli. Immunofluorescence can visualise the spatial and temporal dynamics of H3S28 phosphorylation at the single-cell level.
Kinase activity assays
In vitro kinase assays using recombinant histone H3 or H3 peptides as substrates can directly measure the catalytic activity of candidate kinases. These assays are useful for determining kinetic parameters and testing inhibitors.
CRISPR-based genetic screens
Genome-wide CRISPR knockout or activation screens can identify genes that regulate H3S28 phosphorylation or are required for its downstream effects. Such screens can uncover novel components of the signalling pathways that converge on H3S28.
How CRISPR Can Be Used to Study GO:0044022 histone H3S28 kinase activity
Knockout
CRISPR knockout of kinases such as MSK1, Aurora B, or CaMKII can abolish H3S28 phosphorylation and reveal their specific contributions to gene expression and cellular phenotypes. Knockout cell lines are also valuable for identifying compensatory kinases.
Point Mutation
Introducing point mutations in histone H3 genes, such as H3S28A (phospho-deficient) or H3S28D (phospho-mimetic), allows researchers to dissect the causal role of H3S28 phosphorylation without affecting other histone modifications. These models are particularly useful for studying crosstalk with H3K27 acetylation.
Knock-in
Knock-in of tagged histone H3 or kinase alleles enables affinity purification and proteomic analysis of H3S28 kinase complexes. Tagged knock-in models also facilitate live-cell imaging of chromatin dynamics.
Overexpression
Overexpression of wild-type or constitutively active kinases can amplify H3S28 phosphorylation and downstream transcriptional responses, helping to identify target genes and disease relevance. Conversely, overexpression of dominant-negative mutants can block the pathway.
How EDITGENE Supports histone H3S28 kinase activity Research
Researchers studying histone H3S28 kinase activity-related genes often need to determine whether a candidate gene is causally involved in the phosphorylation of H3S28 and its downstream transcriptional programs. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models, enabling functional validation of kinases, histone substrates, and regulatory proteins.
Contact EDITGENE today to design your custom CRISPR model for histone H3S28 kinase activity research.
Frequently Asked Questions About histone H3S28 kinase activity
What is histone H3S28 kinase activity?
Histone H3S28 kinase activity (GO:0044022) is the enzymatic activity that catalyses the transfer of a phosphate group from ATP to serine 28 of histone H3, producing phospho-H3S28 and ADP.
What genes are involved in histone H3S28 kinase activity?
Key genes include MSK1 (RPS6KA5), MSK2 (RPS6KA4), Aurora B (AURKB), JNK (MAPK8/9/10), CaMKII (CAMK2A/B/D/G), and PCAF (KAT2B), as well as histone H3 genes such as H3F3A and HIST1H3 family members.
How is H3S28 phosphorylation regulated?
It is regulated by upstream signalling pathways including p38/MAPK, JNK, and calcium signalling, and can be influenced by prior histone modifications such as H3K27 acetylation.
What diseases are associated with H3S28 kinase activity?
Dysregulation has been linked to oncogene-induced senescence, osteosarcoma autophagy, cardiac dysfunction, and lymphocyte quiescence.
What methods are used to study H3S28 phosphorylation?
Common methods include ChIP-seq, Western blotting, immunofluorescence, in vitro kinase assays, and CRISPR screens.
Can CRISPR be used to study H3S28 kinase activity?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect the function of H3S28 kinases and histone H3.
What is the role of MSK1 in H3S28 phosphorylation?
MSK1 is a stress-activated kinase that phosphorylates H3S28 and triggers the expression of the INK4AB/ARF locus in oncogene-induced senescence.
How does H3S28 phosphorylation affect transcription?
It can disrupt Polycomb repressive complexes and recruit transcriptional co-activators, leading to gene activation.
Is H3S28 phosphorylation linked to H3K27 acetylation?
Yes, H3K27 acetylation can influence whether H3S28 or H3S10 is phosphorylated upon mitogen stimulation, creating distinct epialleles.
What cell models are available for studying H3S28 kinase activity?
EDITGENE offers knockout, point mutation, knock-in, and overexpression cell models for kinases and histone H3, as well as CRISPR library screening and bioinformatics services.
Conclusion
Histone H3S28 kinase activity (GO:0044022) is a key epigenetic mechanism that translates extracellular signals into transcriptional programs. Its dysregulation is implicated in cancer, senescence, and cardiac disease, making it a compelling target for basic and translational research. By leveraging CRISPR-based models and advanced bioinformatics, researchers can uncover the precise roles of H3S28 kinases and their downstream effectors, paving the way for novel therapeutic strategies.
References
- 1. Wang C et al.. 2013. Evidence against a role for the JIL-1 kinase in H3S28 phosphorylation and 14-3-3 recruitment to active genes in Drosophila.. PLoS One 8(4):e62484 PMID: 23638096
- 2. Kong D et al.. 2019. PCAF regulates H3 phosphorylation and promotes autophagy in osteosarcoma cells.. Biomed Pharmacother 118:109395 PMID: 31545241
- 3. Sawicka A et al.. 2014. H3S28 phosphorylation is a hallmark of the transcriptional response to cellular stress.. Genome Res 24(11):1808-20 PMID: 25135956
- 4. Saadatmand AR et al.. 2019. CaM kinase II regulates cardiac hemoglobin expression through histone phosphorylation upon sympathetic activation.. Proc Natl Acad Sci U S A 116(44):22282-22287 PMID: 31619570
- 5. Khan DH et al.. 2017. Mitogen-induced distinct epialleles are phosphorylated at either H3S10 or H3S28, depending on H3K27 acetylation.. Mol Biol Cell 28(6):817-824 PMID: 28077620
- 6. Culerrier R et al.. 2016. MSK1 triggers the expression of the INK4AB/ARF locus in oncogene-induced senescence.. Mol Biol Cell 27(17):2726-34 PMID: 27385346
- 7. Frangini A et al.. 2013. The aurora B kinase and the polycomb protein ring1B combine to regulate active promoters in quiescent lymphocytes.. Mol Cell 51(5):647-61 PMID: 24034696
- 8. Yoshida I et al.. 2014. Formaldehyde-induced histone H3 phosphorylation via JNK and the expression of proto-oncogenes.. Mutat Res 770:9-18 PMID: 25771866
