GO:0006338 chromatin remodeling: ATP-Dependent Chromatin Dynamics, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0006338 (chromatin remodeling) is the dynamic reorganization of chromatin structure that enables DNA metabolic processes such as transcriptional regulation, DNA recombination, DNA repair and DNA replication.
• Chromatin remodeling is carried out by ATP-dependent remodeling complexes that slide, evict or restructure nucleosomes, and by histone-modifying activities that alter chromatin accessibility.
• Remodeling complexes are built from conserved ATPase subunits plus lineage-specific accessory subunits, as shown by comparative studies in Arabidopsis and other plants.
• Chromatin remodeling links metabolic signaling to gene expression, positioning remodelers as sensors that convert cellular metabolic state into transcriptional output.
• Dysregulation of remodeling factors underlies human disease, including cancer and neurodevelopmental disorders, with ATRX being a well-documented example.
• CRISPR-based knockout, point-mutation, knock-in and overexpression models are central tools for assigning causal roles to remodeling genes in development, stress responses and disease.
Description
Chromatin remodeling (GO:0006338) is a biological process in which the structure of chromatin is dynamically reorganized, allowing DNA metabolic processes such as transcriptional regulation, DNA recombination, DNA repair and DNA replication to occur. Because genomic DNA is packaged into nucleosomes and higher-order chromatin, the accessibility of regulatory sequences is not fixed; it is actively controlled by dedicated machineries that consume ATP to move, evict or restructure nucleosomes. This process is therefore a central node connecting signaling inputs to gene expression programs. Research over the past two decades has shown that chromatin remodeling is not a single reaction but a family of related activities performed by multi-subunit complexes. These complexes share conserved ATPase motors but differ in accessory subunits, recruitment mechanisms and biological outputs, a principle established by biochemical and genetic studies of remodeling enzymes. Comparative analyses in plants have further revealed both deeply conserved and lineage-specific subunits, indicating that remodeling complexity has been tuned during evolution. For researchers, GO:0006338 matters because it provides a unifying framework for interpreting phenotypes that range from embryonic lethality and developmental defects to stress sensitivity and tumorigenesis. Understanding which remodeling complex acts at a given locus, and how its activity is regulated by metabolic and developmental cues, is now a routine question in functional genomics. This article summarizes the definition, mechanism, key genes, disease links and experimental strategies for studying chromatin remodeling.
chromatin remodeling At A Glance
| GO ID | GO:0006338 |
|---|---|
| GO term | chromatin remodeling |
| Ontology | biological_process |
| Synonym | ATP-dependent chromatin remodeling; ATP-dependent chromatin remodelling; chromatin modeling; chromatin modelling; chromatin remodelling |
| Major function | Dynamic reorganization of chromatin structure to permit transcriptional regulation, DNA recombination, DNA repair and DNA replication |
| Molecular basis | ATP-dependent nucleosome sliding, eviction and restructuring by multi-subunit remodeling complexes |
| Conservation | Core ATPase subunits are conserved, with lineage-specific accessory subunits described in plants and animals |
| Signaling link | Connects metabolic signaling to gene expression programs |
| Disease relevance | Implicated in cancer, neurodevelopmental disorders and other human diseases |
What Is GO:0006338?
GO:0006338 chromatin remodeling is defined as a dynamic process of chromatin reorganization that results in changes to chromatin structure. These structural changes allow DNA metabolic processes such as transcriptional regulation, DNA recombination, DNA repair and DNA replication to take place. In practice, the term covers ATP-dependent nucleosome sliding, nucleosome eviction and exchange, and the associated reorganization of chromatin architecture that together modulate access of DNA-binding factors to the genome.
Why Is chromatin remodeling Important in Cell Biology?
Chromatin remodeling is important because it determines when and where the genome can be read, repaired or replicated. By controlling nucleosome positioning and chromatin accessibility, remodeling complexes set the permissive or repressive state of regulatory elements, thereby shaping transcriptional programs in development, metabolism and stress responses. Because the same machinery is used across many contexts, mutations in remodeling genes often produce pleiotropic phenotypes, including developmental abnormalities and increased disease susceptibility.
• Controls chromatin accessibility, thereby gating transcription factor binding and gene expression.
• Enables DNA repair and recombination by making damaged or recombining DNA regions accessible.
• Supports DNA replication by reorganizing nucleosomes ahead of and behind replication forks.
• Links metabolic signaling to transcriptional output, integrating cellular energy status with gene regulation.
• Is essential for normal embryonic development in mammals.
• Regulates plant responses to environmental stress through remodeling factor activity.
• Is mutated or dysregulated in human cancers and neurodevelopmental disorders.
• Provides a conserved but lineage-adapted system, with plant-specific subunits expanding functional diversity.
• Offers a rich target space for CRISPR-based functional genomics and therapeutic hypothesis testing.
What Happens During chromatin remodeling?
Recognition and recruitment of remodeling complexes
In simple terms: First, the cell decides where remodeling should happen by recruiting the right machine to the right spot in the genome.
Chromatin remodeling begins with the recruitment of multi-subunit remodeling complexes to specific genomic loci. These complexes contain an ATPase motor subunit plus accessory subunits that recognize histone modifications, DNA sequences or interacting transcription factors, thereby targeting the complex to particular nucleosomes. Comparative studies in plants show that both conserved and lineage-specific subunits contribute to this targeting specificity. Recruitment is a regulated step that determines which genes or regions will subsequently change their chromatin state.
ATP-dependent nucleosome mobilization
In simple terms: Once in place, the machine uses energy from ATP to physically move or remove the protein spools around which DNA is wrapped.
The core catalytic activity of chromatin remodeling is ATP-dependent nucleosome mobilization. The ATPase subunit hydrolyzes ATP to slide nucleosomes along DNA, evict them, or alter their composition, thereby changing the accessibility of underlying DNA sequences. This activity is the defining biochemical feature of ATP-dependent chromatin remodeling and is conserved across eukaryotes. The outcome can be either increased or decreased accessibility depending on the complex and context.
Chromatin structural reorganization and accessibility change
In simple terms: The movement of nucleosomes changes how tightly DNA is packaged, opening or closing regions of the genome.
Nucleosome mobilization leads to changes in higher-order chromatin structure, including altered nucleosome occupancy, positioning and compaction. These structural changes modify the accessibility of DNA to regulatory factors and enzymes, which is the functional output of GO:0006338. In plants, such reorganization is central to developmental transitions and stress responses. In mammalian embryos, chromatin remodeling accompanies major reprogramming events that establish new gene expression states.
Coupling to DNA metabolic processes
In simple terms: The newly opened or closed chromatin then allows processes like transcription, repair and replication to proceed.
The structural changes produced by remodeling are coupled to DNA metabolic processes including transcriptional regulation, DNA recombination, DNA repair and DNA replication. For example, remodeling factors can expose promoters to transcription machinery or grant repair enzymes access to lesions. Metabolic signaling pathways can also feed into this step, linking cellular energy status to the remodeling outcome. This coupling explains why remodeling defects often manifest as broad transcriptional and genomic instability phenotypes.
Resolution and restoration of chromatin states
In simple terms: After the job is done, the cell often resets the chromatin so that the process can be repeated or terminated appropriately.
Following remodeling, chromatin states are often resolved by additional activities, including histone modification and nucleosome reassembly, to restore or establish a new stable configuration. This resolution step is important for terminating transcriptional programs and for maintaining genome stability. In developmental contexts, failure to properly resolve remodeling can disrupt cell fate decisions, as observed in studies of embryonic chromatin remodeling. Plant studies similarly show that timely resolution of remodeling is required for appropriate stress responses.
Key Genes Involved in GO:0006338 chromatin remodeling
The genes below encode representative ATPase subunits, accessory proteins and associated factors that carry out or regulate chromatin remodeling (GO:0006338).
| Gene | Major Role | Research Relevance |
|---|---|---|
| SMARCA4 | ATPase subunit of SWI/SNF remodeling complexes | Frequently mutated in cancers; model for remodeling-dependent tumor suppression |
| SMARCA2 | ATPase subunit of SWI/SNF complexes | Paralog of SMARCA4; studied for synthetic lethality in remodeling-deficient tumors |
| ARID1A | Accessory subunit of SWI/SNF complexes | Recurrently mutated in multiple cancer types; links remodeling to tumorigenesis |
| CHD1 | Chromodomain helicase DNA-binding ATPase | Involved in chromatin accessibility and transcription; studied in development and cancer |
| CHD4 | ATPase subunit of NuRD complex | Connects remodeling to histone deacetylation and gene repression |
| ATRX | SWI/SNF-like ATPase that deposits histone H3.3 | Mutated in neurodevelopmental disorders and cancers; direct disease link |
| DAXX | Histone H3.3 chaperone partnering with ATRX | Works with ATRX in chromatin remodeling at heterochromatin |
| INO80 | ATPase subunit of INO80 complex | Functions in DNA repair and replication-coupled remodeling |
| SWR1 | ATPase that exchanges H2A for H2A.Z | Model for histone variant exchange during remodeling |
| BRM | Plant SWI/SNF ATPase | Regulates developmental and stress-responsive genes in plants |
| SYD | Plant CHD-type remodeling ATPase | Studied for roles in plant development and environmental responses |
| PKL | Plant CHD-type remodeling factor | Involved in developmental transitions and stress signaling |
| DDM1 | SNF2-family chromatin remodeler in plants | Required for DNA methylation maintenance and heterochromatin stability |
| H2A.Z | Histone variant deposited by SWR1-type remodelers | Marks dynamic chromatin and is studied in transcription and stress responses |
| H3.3 | Histone variant deposited by ATRX/DAXX | Linked to heterochromatin maintenance and disease when misregulated |
| BAF155 | Accessory subunit of SWI/SNF complexes | Modulates complex assembly and target specificity |
| BAF170 | Accessory subunit of SWI/SNF complexes | Contributes to complex stability and recruitment |
How Is chromatin remodeling Regulated?
Chromatin remodeling is regulated at multiple levels. Recruitment of remodeling complexes to specific loci is controlled by transcription factors, histone modifications and non-coding RNAs that recognize or bind chromatin. Metabolic signaling pathways can modulate remodeling activity, providing a mechanism by which cellular energy status influences gene expression. In plants, environmental stress cues regulate remodeling factor expression and activity, allowing adaptive transcriptional responses. Developmental signals also control remodeling during embryogenesis and organogenesis, as shown in mammalian embryo studies. Finally, the abundance and post-translational modification of ATPase subunits and accessory proteins fine-tune complex activity and target specificity.
chromatin remodeling and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SMARCA4 | Cancer (e.g., lung, ovarian) | Knockout and point-mutation cell lines to test remodeling-dependent tumor suppression |
| ARID1A | Cancer (e.g., endometrial, ovarian) | Knockout models to study synthetic lethality with remodeling inhibitors |
| ATRX | Neurodevelopmental disorders and cancer | Knock-in of patient mutations and knockout to assess H3.3 deposition defects |
| CHD4 | Cancer and neurodevelopmental phenotypes | Knockout and tagged knock-in to map NuRD complex targets |
| DDM1 | Plant heterochromatin stability and stress response | Plant knockout lines to study DNA methylation and stress tolerance |
Chromatin remodeling in cancer
Mutations in genes encoding chromatin remodeling subunits are common in human cancers. Loss or inactivation of SWI/SNF components such as SMARCA4 and ARID1A alters chromatin accessibility and transcriptional programs, contributing to tumor initiation and progression. Because remodeling complexes are frequently mutated, they are attractive targets for functional studies and therapeutic hypothesis testing using CRISPR models.
ATRX and neurodevelopmental disorders
ATRX is a chromatin remodeling ATPase that partners with DAXX to deposit histone H3.3 at heterochromatic regions. Mutations in ATRX cause neurodevelopmental disorders and are also found in cancers, illustrating how a single remodeling factor can link chromatin regulation to both developmental and oncogenic phenotypes. Studies of ATRX provide a paradigm for understanding how remodeling defects produce disease.
Chromatin remodeling in brain development and function
Remodeling complexes are critical in the brain, where they regulate gene expression programs underlying neuronal development and plasticity. Disruption of remodeling factors has been associated with neurodevelopmental and neurological phenotypes, as reviewed in the context of brain development. These findings highlight the importance of chromatin remodeling for post-mitotic cell function and disease.
Chromatin remodeling in embryonic development and stress responses
In mammalian embryos, chromatin remodeling is required for reprogramming events that establish totipotency and lineage specification, and its disruption causes developmental failure. In plants, remodeling factors mediate responses to environmental stresses such as drought, salt and temperature, linking chromatin dynamics to stress tolerance. Together, these contexts show that remodeling defects can manifest as developmental or stress-related disease phenotypes.
From chromatin remodeling-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a remodeling gene essential for proliferation? | CRISPR knockout in cell lines followed by growth assays |
| Does a specific patient mutation alter remodeling activity? | Point-mutation knock-in of the variant into an endogenous locus |
| Where does a remodeling complex bind genome-wide? | Tagged knock-in of an ATPase subunit for ChIP-seq or CUT&RUN |
| Does overexpression of a remodeler drive transformation? | Overexpression cell models with transcriptomic readouts |
| Which remodeling genes mediate stress responses? | Plant knockout and overexpression lines under stress conditions |
| Can remodeling gene loss be rescued by a paralog? | Knockout plus overexpression of paralog in isogenic backgrounds |
How to Study the chromatin remodeling Process
| Method | What It Measures | Typical Application |
|---|---|---|
| ATAC-seq | Chromatin accessibility genome-wide | Comparing wild-type and remodeling mutants |
| MNase-seq | Nucleosome positioning and occupancy | Assessing nucleosome sliding by remodelers |
| ChIP-seq | Binding of remodelers and histone variants | Mapping H2A.Z or H3.3 deposition |
| RNA-seq | Transcriptional changes | Identifying genes dependent on remodeling activity |
| Proteomics / IP-MS | Complex composition and interactions | Defining subunit composition of remodeling complexes |
| Live-cell imaging | Dynamic localization of remodelers | Studying recruitment kinetics in real time |
| Single-cell ATAC-seq | Cell-to-cell variation in accessibility | Dissecting heterogeneity in development and disease |
| CRISPR screens | Fitness effects of remodeling gene loss | Identifying essential remodeling factors in cancer cells |
Genome-wide mapping of chromatin accessibility
Assays such as ATAC-seq and DNase-seq measure chromatin accessibility and are widely used to assess the functional output of chromatin remodeling. By comparing wild-type and remodeling-mutant cells, researchers can identify regions whose accessibility depends on specific remodelers. These methods are also applied in plants to study stress-induced chromatin changes.
Nucleosome positioning and histone variant mapping
MNase-seq and ChIP-seq for histone variants such as H2A.Z and H3.3 reveal how remodeling complexes reposition nucleosomes and deposit variants. Such approaches have been used to define the roles of SWR1-type and ATRX/DAXX remodeling activities. In plants, similar methods have clarified the functions of DDM1 and related remodelers.
Transcriptomics and proteomics of remodeling mutants
RNA-seq of remodeling mutants identifies genes whose expression depends on remodeling activity, linking chromatin state to transcriptional output. Proteomic approaches can define complex composition and interaction partners, as demonstrated for SWI/SNF and related complexes. In plants, transcriptomics has been used to dissect remodeling factor roles in stress responses.
Imaging and single-cell approaches
Live-cell imaging of fluorescently tagged remodelers and single-cell ATAC-seq allow researchers to study chromatin remodeling dynamics at the single-cell level. These approaches are valuable for understanding heterogeneity in remodeling activity during development and disease. They complement bulk assays by revealing cell-to-cell variability in chromatin states.
How CRISPR Can Be Used to Study GO:0006338 chromatin remodeling
Knockout
CRISPR knockout is used to delete remodeling genes and assess loss-of-function phenotypes, such as changes in proliferation, differentiation or stress tolerance. Knockout of SWI/SNF subunits in cell lines has been instrumental in defining their roles in transcription and tumor suppression. In plants, knockout lines have been used to study remodeling factor functions in development and stress responses.
Point Mutation
Point-mutation knock-in allows researchers to model disease-associated missense variants in endogenous remodeling genes. This approach is particularly valuable for genes like ATRX, where specific mutations produce distinct clinical phenotypes. Point mutants can be compared with knockouts to distinguish loss-of-function from gain-of-function or dominant-negative effects.
Knock-in
Knock-in of tags or reporters into remodeling genes enables mapping of protein localization and interactions. Tagged knock-in of ATPase subunits facilitates ChIP-seq and proteomic studies of complex composition. Knock-in of histone variants or their chaperones can also be used to study deposition dynamics.
Overexpression
Overexpression models are used to test whether increased dosage of a remodeling factor alters chromatin state and gene expression. Overexpression of remodelers or their subunits can drive oncogenic or developmental phenotypes, providing insight into dosage-sensitive functions. In plants, overexpression lines complement knockout studies to reveal gain-of-function effects.
How EDITGENE Supports chromatin remodeling Research
Researchers studying chromatin remodeling-related genes often need to determine whether a candidate gene is causally involved in a specific chromatin, developmental or disease phenotype. Establishing causality requires precise genetic models that isolate the gene of interest and its variants from confounding background effects. EDITGENE provides end-to-end CRISPR services designed to generate such models efficiently and reproducibly.
Contact EDITGENE today to design your custom CRISPR model for chromatin remodeling research.
Frequently Asked Questions About chromatin remodeling
What is chromatin remodeling (GO:0006338)?
Chromatin remodeling is the dynamic reorganization of chromatin structure that allows DNA metabolic processes such as transcriptional regulation, DNA recombination, DNA repair and DNA replication to occur.
What genes are involved in chromatin remodeling?
Key genes include ATPase subunits such as SMARCA4, SMARCA2, CHD1, CHD4, ATRX and INO80, along with accessory subunits like ARID1A and BAF155, and plant-specific factors such as BRM, SYD and DDM1.
How does ATP-dependent chromatin remodeling work?
Remodeling complexes use ATP hydrolysis to slide, evict or restructure nucleosomes, thereby changing DNA accessibility for transcription, repair and replication.
Why is chromatin remodeling important for gene expression?
By controlling nucleosome positioning and accessibility, remodeling complexes determine whether transcription factors and RNA polymerase can access regulatory elements, thereby shaping gene expression programs.
What diseases are linked to chromatin remodeling defects?
Defects in remodeling genes are linked to cancers, neurodevelopmental disorders and other conditions, with ATRX mutations being a well-studied example.
How do plants use chromatin remodeling?
Plants use remodeling complexes to regulate development and environmental stress responses, with conserved and plant-specific subunits contributing to these functions.
What methods are used to study chromatin remodeling?
Common methods include ATAC-seq, MNase-seq, ChIP-seq, RNA-seq, proteomics, imaging and CRISPR screens.
Can CRISPR be used to study chromatin remodeling genes?
Yes, CRISPR knockout, point-mutation, knock-in and overexpression models are widely used to assign causal roles to remodeling genes.
What is the role of ATRX in chromatin remodeling?
ATRX is a remodeling ATPase that partners with DAXX to deposit histone H3.3, and its mutation causes neurodevelopmental disorders and is found in cancers.
How does metabolic signaling regulate chromatin remodeling?
Metabolic pathways can modulate remodeling complex activity, linking cellular energy status to transcriptional output.
Conclusion
Chromatin remodeling (GO:0006338) is a fundamental biological process that governs genome accessibility and thereby influences transcription, DNA repair, recombination and replication. Its importance spans development, metabolism, stress responses and disease, with mutations in remodeling genes contributing to cancer and neurodevelopmental disorders. Continued research using precise CRISPR models and genome-wide assays will clarify how individual remodeling complexes are targeted and how their dysfunction can be therapeutically addressed.
References
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- 3. Shang JY et al.. 2022. Chromatin-remodeling complexes: Conserved and plant-specific subunits in Arabidopsis.. J Integr Plant Biol 64(2):499-515 PMID: 34964264
- 4. Morrison AJ. 2020. Chromatin-remodeling links metabolic signaling to gene expression.. Mol Metab 38:100973 PMID: 32251664
- 5. Magaña-Acosta M et al.. 2025. ATRX: From Chromatin Remodeling to Disease.. Genesis 63(6):e70031 PMID: 41222108
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