GO:0016589 NURF complex: Components, Assembly and Research Methods, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0016589 describes the NURF (nucleosome remodeling factor) complex, an ISWI-family ATP-dependent chromatin remodeling machine that contains SNF2L (SMARCA1) as its catalytic ATPase subunit and BPTF as its large NURF301 homolog subunit.
• NURF is best known for regulating transcription from RNA polymerase II promoters by sliding and repositioning nucleosomes, thereby controlling DNA accessibility.
• The subunit composition of NURF varies by species and cell context, and alternative NURF complexes with distinct subunit assemblies can sustain specific transcriptional programs in cancer.
• Pathogenic variants in SMARCA1, the gene encoding the NURF ATPase SNF2L, cause an X-linked neurodevelopmental disorder whose severity is modulated by NURF complex composition.
• NURF regulates diverse biological processes including Notch target gene activity, lipid droplet size, insulator region accessibility, and leukemia stem cell maintenance.
• CRISPR-based knockout, point mutation, knock-in, and overexpression models are powerful tools for dissecting NURF subunit function and for validating NURF-related disease mechanisms.
Description
The NURF complex (nucleosome remodeling factor complex; GO:0016589) is an ATP-dependent chromatin remodeling complex that belongs to the ISWI family of nucleosome remodelers. It was originally identified in Drosophila melanogaster as a factor that facilitates transcription from RNA polymerase II promoters by altering nucleosome positioning. In mammals, the catalytic ATPase subunit is SNF2L (encoded by SMARCA1), and the largest subunit is BPTF, the mammalian homolog of Drosophila NURF301. The complex also contains additional subunits whose identity varies slightly across species and cell types. Because NURF controls the accessibility of regulatory DNA elements, it sits at the interface of chromatin structure, transcription factor binding, and gene expression programs. Researchers study GO:0016589 to understand how nucleosome remodeling shapes normal development and how its dysregulation contributes to cancer and neurodevelopmental disease. The NURF complex is therefore a central node in chromatin biology, with direct relevance to leukemia, neurodevelopmental disorders, and metabolic regulation.
NURF complex At A Glance
| GO ID | GO:0016589 |
|---|---|
| GO term | NURF complex |
| Ontology | cellular_component |
| Synonym | nucleosome remodeling factor complex |
| Major function | ATP-dependent nucleosome remodeling and regulation of transcription from RNA polymerase II promoters |
| Catalytic subunit | SNF2L (SMARCA1), an ISWI-family ATPase |
| Large subunit | BPTF, the human NURF301 homolog |
| Additional subunits | Composition varies slightly with species and cell context |
| Conserved across species | Yes, from Drosophila to mammals |
What Is GO:0016589?
GO:0016589 (NURF complex) is a cellular component term describing an ISWI-family chromatin remodeling complex. According to the QuickGO definition, it contains an ATPase subunit of the ISWI family (SNF2L in mammals), a NURF301 homolog (BPTF in humans), and additional subunits whose composition varies slightly with species. The NURF complex is involved in regulation of transcription from RNA polymerase II promoters. Its synonym is nucleosome remodeling factor complex.
Why Is NURF complex Important in Cell Biology?
The NURF complex is important because it directly controls chromatin accessibility at promoters and insulator regions, thereby influencing which genes are expressed in a given cell. Its catalytic subunit SNF2L (SMARCA1) and its large subunit BPTF are recurrently implicated in human disease, including X-linked neurodevelopmental disorders and acute myeloid leukemia. Because NURF activity can be redirected by alternative subunit assemblies, it represents a dynamic regulatory module that cancer cells can exploit. Understanding GO:0016589 therefore informs both basic chromatin biology and translational efforts in oncology and neurodevelopment.
• NURF regulates RNA polymerase II transcription by sliding and repositioning nucleosomes at promoters.
• SMARCA1 (SNF2L) pathogenic variants cause an X-linked neurodevelopmental disorder modulated by NURF composition.
• An alternative NURF complex sustains acute myeloid leukemia by regulating insulator region accessibility.
• KAT6A chimeras form a self-reinforcing epigenetic module with NURF and MLL/COMPASS to sustain AML.
• NURF interacts with the Pzg protein to regulate Notch target gene activity.
• The MRT-NURF complex regulates lipid droplet size, linking NURF to metabolic biology.
• BAP60 plays an opposite role to the MRT-NURF complex in regulating lipid droplet size.
• NURF subunit composition varies by species and cell context, creating opportunities for context-specific targeting.
• NURF is a validated dependency in specific leukemia subtypes, making it a candidate therapeutic target.
• CRISPR models enable causal testing of NURF subunit function in disease-relevant cells.
NURF complex: Biological Process, Structure, and Molecular Mechanism
What Happens During NURF complex?
In simple terms: NURF acts like a molecular motor that slides nucleosomes along DNA to open or close access to genes.
The NURF complex is involved in regulation of transcription from RNA polymerase II promoters. It binds chromatin and uses ATP hydrolysis to reposition nucleosomes, thereby altering the accessibility of promoter and enhancer regions to transcription factors and RNA polymerase II. In Drosophila, NURF was shown to facilitate transcription from RNA polymerase II promoters, establishing its role as a positive regulator of transcription. In mammalian cells, NURF regulates the accessibility of insulator regions, which are boundary elements that organize chromatin architecture. Through these activities, NURF influences gene expression programs that control development, metabolism, and cell fate.
NURF in Notch Signaling and Developmental Gene Regulation
In simple terms: NURF helps switch on genes that respond to Notch signals during development.
A novel Pzg-NURF complex regulates Notch target gene activity, demonstrating that NURF can be recruited to specific genomic loci through interaction with sequence-specific DNA-binding proteins. This finding established that NURF is not a generic remodeler but can be targeted to particular regulatory networks. The biological functions of the ISWI chromatin remodeling complex NURF include roles in development and gene regulation, as reviewed by Badenhorst et al.. These studies collectively show that NURF participates in developmental signaling pathways by controlling the chromatin state of target genes.
Structure and Composition of NURF complex
In simple terms: NURF is built from a core ATPase engine plus a large scaffold subunit and several accessory proteins.
The NURF complex contains an ATPase subunit of the ISWI family (SNF2L in mammals), a NURF301 homolog (BPTF in humans), and additional subunits whose composition varies slightly with species. The catalytic subunit SNF2L (SMARCA1) provides the ATP-dependent motor activity that drives nucleosome sliding. BPTF is the largest subunit and is thought to serve as a scaffold that interacts with chromatin marks and transcription factors. Additional subunits, such as those identified in Drosophila and mammalian studies, contribute to complex stability, substrate recognition, and regulation. The existence of alternative NURF complexes with distinct subunit assemblies indicates that composition is context-dependent.
Molecular Mechanism of NURF complex
In simple terms: NURF burns ATP to physically push nucleosomes along DNA, changing which parts of the genome are accessible.
The molecular function of NURF is ATP-dependent nucleosome remodeling, catalyzed by the ISWI-family ATPase SNF2L (SMARCA1). ATP hydrolysis drives conformational changes in the ATPase domain that translocate nucleosomes along DNA, thereby altering histone-DNA contacts. This remodeling activity regulates transcription from RNA polymerase II promoters by controlling the accessibility of promoter DNA to the transcriptional machinery. In acute myeloid leukemia, an alternative NURF complex regulates the accessibility of insulator regions, suggesting that NURF can act at boundary elements as well as promoters. The activity of NURF is modulated by its subunit composition and by interactions with partner proteins such as Pzg and MRT.
Regulation of NURF Activity and Assembly
In simple terms: NURF activity is tuned by which subunits are present and by interactions with other proteins.
NURF complex composition varies slightly with species and cell context, and this variation modulates its function. Pathogenic variants in SMARCA1 cause an X-linked neurodevelopmental disorder that is modulated by NURF complex composition, indicating that the stoichiometry of subunits influences disease severity. In Drosophila, the Pzg protein recruits NURF to Notch target genes, providing a mechanism for locus-specific regulation. The MRT protein functions with the NURF complex to regulate lipid droplet size, and BAP60 plays an opposite role to the MRT-NURF complex, illustrating that accessory factors can fine-tune NURF output. In AML, KAT6A chimeras form a self-reinforcing epigenetic module with NURF and MLL/COMPASS, linking NURF to oncogenic transcriptional networks.
Key Genes Involved in GO:0016589 NURF complex
The following genes and proteins are core components or key interactors of the NURF complex (GO:0016589) and are frequently studied in NURF-related research.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SMARCA1 (SNF2L) | Catalytic ATPase subunit of NURF; ISWI-family motor | Pathogenic variants cause X-linked neurodevelopmental disorder; target in AML |
| BPTF | Large subunit, NURF301 homolog; scaffold | Essential for NURF assembly and chromatin targeting |
| Pzg | Drosophila protein that recruits NURF to Notch targets | Regulates Notch target gene activity |
| MRT | Functions with NURF to regulate lipid droplet size | Links NURF to metabolic regulation |
| BAP60 | Plays opposite role to MRT-NURF in lipid droplet size | Modulates NURF-dependent lipid metabolism |
| KAT6A | Forms chimeric epigenetic module with NURF and MLL/COMPASS | Sustains AML; therapeutic target |
| MLL/COMPASS | Interacts with NURF in AML epigenetic module | Oncogenic transcriptional regulation |
| ISWI family ATPases | Related remodelers; SNF2L is the NURF member | Comparative studies of chromatin remodeling |
| NURF301 (Drosophila) | Homolog of BPTF; large subunit | Model organism studies of NURF function |
| SNF2L (alternative name) | Same as SMARCA1; ATPase subunit | Used interchangeably in literature |
| Notch pathway genes | Targets of Pzg-NURF regulation | Developmental signaling |
| Insulator region proteins | Boundary elements regulated by NURF in AML | Chromatin architecture |
| Lipid droplet proteins | Regulated by MRT-NURF and BAP60 | Metabolic disease models |
| SMARCA1 variants | Disease-associated mutations | Neurodevelopmental disorder modeling |
| BPTF interactors | Transcription factors and chromatin marks | NURF targeting mechanisms |
| KAT6A chimeras | Fusion proteins in AML | Leukemia research |
How Is NURF complex Regulated?
NURF complex activity is regulated at multiple levels. Its subunit composition varies with species and cell context, and this variation modulates its function and disease severity. In Drosophila, recruitment of NURF to specific loci is mediated by DNA-binding proteins such as Pzg, which directs the complex to Notch target genes. Accessory proteins like MRT and BAP60 can fine-tune NURF output in metabolic contexts. In acute myeloid leukemia, KAT6A chimeras form a self-reinforcing epigenetic module with NURF and MLL/COMPASS, suggesting that oncogenic fusion proteins can hijack NURF to sustain aberrant transcription. These layers of regulation ensure that NURF activity is tailored to specific genomic loci and cellular states.
NURF complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SMARCA1 (SNF2L) | X-linked neurodevelopmental disorder | Patient-derived iPSC neurons with KO or point mutation |
| BPTF | NURF assembly and chromatin targeting | Knockout and tagged knock-in in cell lines |
| KAT6A | Acute myeloid leukemia | AML cell lines with KO or overexpression |
| MRT | Lipid droplet size regulation | KO and overexpression in Drosophila or mammalian cells |
| BAP60 | Lipid droplet size regulation | KO and overexpression models |
NURF complex in Acute Myeloid Leukemia
An alternative NURF complex sustains acute myeloid leukemia by regulating the accessibility of insulator regions. This finding identifies NURF as a dependency in AML and suggests that targeting NURF subunits could disrupt leukemic transcriptional programs. Furthermore, KAT6A chimeras form a self-reinforcing epigenetic module with NURF and MLL/COMPASS to sustain AML, providing a mechanistic link between NURF and oncogenic fusion proteins. These studies highlight NURF as a potential therapeutic target in specific AML subtypes.
NURF complex in X-Linked Neurodevelopmental Disorders
Pathogenic variants in SMARCA1, the gene encoding the NURF ATPase SNF2L, cause an X-linked neurodevelopmental disorder. The severity and presentation of this disorder are modulated by NURF complex composition, indicating that the stoichiometry of NURF subunits influences disease outcomes. This work establishes NURF as a critical complex in neurodevelopment and provides a rationale for studying NURF assembly in patient-derived models.
NURF complex in Metabolic Regulation
The MRT protein functions with the NURF complex to regulate lipid droplet size, linking NURF to lipid metabolism. BAP60 plays an opposite role to the MRT-NURF complex in regulating lipid droplet size, demonstrating that NURF-associated factors can have opposing effects on metabolic phenotypes. These findings suggest that NURF may be relevant to metabolic disorders characterized by abnormal lipid storage.
NURF complex in Notch Signaling and Development
A novel Pzg-NURF complex regulates Notch target gene activity, implicating NURF in developmental signaling pathways. The biological functions of the ISWI chromatin remodeling complex NURF include roles in development and gene regulation. Dysregulation of NURF could therefore contribute to developmental disorders beyond those linked to SMARCA1 variants.
From NURF complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of SMARCA1 impair neurodevelopment? | SMARCA1 knockout in iPSC-derived neurons |
| Do SMARCA1 variants act via gain- or loss-of-function? | Point mutation knock-in at endogenous locus |
| How does BPTF contribute to NURF assembly? | BPTF knockout and tagged knock-in |
| Can NURF be targeted in AML? | NURF subunit knockout in AML cell lines |
| What is the role of MRT-NURF in lipid droplets? | MRT knockout and overexpression |
| How does BAP60 oppose MRT-NURF? | BAP60 knockout and overexpression |
How to Study the NURF complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Gene expression changes | Assessing transcriptional impact of NURF perturbation |
| ATAC-seq | Chromatin accessibility | Mapping NURF-regulated promoters and insulators |
| ChIP-seq | Protein-DNA binding | Localizing NURF subunits on chromatin |
| Mass spectrometry | Protein composition and interactions | Identifying NURF subunits and partners |
| Co-immunoprecipitation | Protein-protein interactions | Validating NURF complex assembly |
| Fluorescence microscopy | Cellular localization and lipid droplet size | Functional studies of NURF in metabolism |
| CRISPR library screening | Gene dependencies and synthetic lethality | Identifying NURF-related vulnerabilities |
| Bioinformatics | Motif enrichment and network analysis | Interpreting NURF regulatory networks |
Genomic and Transcriptomic Methods
RNA-seq and ATAC-seq are commonly used to assess the impact of NURF perturbation on transcription and chromatin accessibility. In AML, ATAC-seq revealed that an alternative NURF complex regulates the accessibility of insulator regions. These methods allow researchers to map the genome-wide consequences of NURF loss or mutation.
Proteomic and Biochemical Methods
Affinity purification coupled with mass spectrometry can identify NURF subunits and their interactions, which is essential because NURF composition varies by species and cell context. Co-immunoprecipitation and Western blotting are used to validate interactions between NURF subunits and partners such as Pzg, MRT, and KAT6A.
Imaging and Functional Assays
Fluorescence microscopy can visualize NURF localization and lipid droplet size in cells. Functional assays such as reporter gene assays and proliferation assays are used to test the consequences of NURF perturbation in disease models.
CRISPR Screening and Bioinformatics
CRISPR library screening can identify genes that synergize with or compensate for NURF loss. Bioinformatics analysis of chromatin accessibility and transcription factor binding motifs helps interpret NURF-dependent regulatory networks.
How CRISPR Can Be Used to Study GO:0016589 NURF complex
Knockout
CRISPR knockout of NURF subunits such as SMARCA1 or BPTF is used to test loss-of-function phenotypes in cell lines and primary cells. In AML, knockout of NURF components can reduce leukemic cell growth and alter insulator accessibility. In neurodevelopmental models, SMARCA1 knockout in iPSC-derived neurons can reveal developmental defects.
Point Mutation
Point mutation knock-in is used to model pathogenic variants in SMARCA1 that cause X-linked neurodevelopmental disorder. By introducing the exact patient variant into the endogenous locus, researchers can distinguish loss-of-function from gain-of-function mechanisms.
Knock-in
Tagged knock-in of NURF subunits, such as adding an epitope tag to BPTF or SNF2L, enables affinity purification and imaging of the endogenous complex. This approach preserves physiological expression levels and is valuable for studying NURF composition.
Overexpression
Overexpression of NURF subunits or disease-associated variants can be used to test sufficiency and dominant-negative effects. For example, overexpression of BAP60 was used to demonstrate its opposite role to MRT-NURF in lipid droplet regulation. Overexpression of KAT6A chimeras can model their cooperation with NURF in AML.
How EDITGENE Supports NURF complex Research
Researchers studying NURF complex-related genes often need to determine whether a candidate gene is causally involved in a specific phenotype, such as leukemia cell growth, neurodevelopmental defects, or lipid droplet regulation. CRISPR-based models provide a rigorous way to test causality by introducing precise genetic alterations into endogenous loci.
Contact EDITGENE today to design your custom CRISPR model for NURF complex research.
Frequently Asked Questions About NURF complex
What is the NURF complex?
The NURF complex (GO:0016589) is an ISWI-family ATP-dependent chromatin remodeling complex that contains SNF2L (SMARCA1) as its ATPase subunit and BPTF as its large subunit, and it regulates transcription from RNA polymerase II promoters.
What genes are involved in the NURF complex?
Key genes include SMARCA1 (SNF2L), BPTF, and additional subunits that vary by species; interactors include Pzg, MRT, BAP60, and KAT6A.
What does the NURF complex do?
It uses ATP hydrolysis to slide and reposition nucleosomes, thereby regulating chromatin accessibility and transcription from RNA polymerase II promoters.
What is the GO ID for NURF complex?
The GO ID for NURF complex is GO:0016589, under the cellular_component ontology.
How is the NURF complex linked to leukemia?
An alternative NURF complex sustains acute myeloid leukemia by regulating the accessibility of insulator regions, and KAT6A chimeras cooperate with NURF to sustain AML.
What diseases are associated with NURF complex mutations?
Pathogenic variants in SMARCA1 cause an X-linked neurodevelopmental disorder modulated by NURF complex composition.
How can I study NURF complex function?
CRISPR knockout, point mutation, knock-in, and overexpression models combined with RNA-seq, ATAC-seq, proteomics, and imaging are commonly used.
What is the role of BPTF in the NURF complex?
BPTF is the human NURF301 homolog and serves as a large scaffold subunit essential for NURF assembly and chromatin targeting.
Does NURF regulate lipid metabolism?
Yes, the MRT-NURF complex regulates lipid droplet size, and BAP60 plays an opposite role.
What model systems are used to study NURF?
Drosophila, mammalian cell lines, and patient-derived iPSC neurons are used, often with CRISPR-based genetic modifications.
Conclusion
The NURF complex (GO:0016589) is a conserved ISWI-family chromatin remodeling machine that controls transcription from RNA polymerase II promoters by regulating nucleosome positioning and chromatin accessibility. Its subunit composition varies by species and cell context, and this flexibility underlies its diverse roles in development, metabolism, and disease. Pathogenic variants in SMARCA1 cause an X-linked neurodevelopmental disorder, while alternative NURF complexes sustain acute myeloid leukemia, making NURF a compelling target for both mechanistic and translational research. CRISPR-based models and genomic methods provide powerful tools to dissect NURF function and to validate its role in human disease.
References
- 1. Radzisheuskaya A et al.. 2023. An alternative NURF complex sustains acute myeloid leukemia by regulating the accessibility of insulator regions.. EMBO J 42(24):e114221 PMID: 37987160
- 2. Picketts D et al.. 2023. Pathogenic variants in SMARCA1 cause an X-linked neurodevelopmental disorder modulated by NURF complex composition.. Res Sq PMID: 37841849
- 3. Mirzaa GM et al.. 2025. Pathogenic variants in SMARCA1 cause an X-linked neurodevelopmental disorder modulated by NURF complex composition.. Nat Commun 16(1):9875 PMID: 41213919
- 4. Kugler SJ et al.. 2010. A novel Pzg-NURF complex regulates Notch target gene activity.. Mol Biol Cell 21(19):3443-8 PMID: 20685964
- 5. Yao Y et al.. 2018. MRT, Functioning with NURF Complex, Regulates Lipid Droplet Size.. Cell Rep 24(11):2972-2984 PMID: 30208321
- 6. Badenhorst P et al.. 2002. Biological functions of the ISWI chromatin remodeling complex NURF.. Genes Dev 16(24):3186-98 PMID: 12502740
- 7. Yao Y et al.. 2022. BAP60 plays an opposite role to the MRT-NURF complex in regulating lipid droplet size.. J Genet Genomics 49(4):377-379 PMID: 35196573
- 8. Lv J et al.. 2025. KAT6A chimeras form a self-reinforcing epigenetic module with NURF and MLL/COMPASS to sustain AML.. Genome Biol 26(1):253 PMID: 40830799
