The 4D nucleome plays a significant role in gene regulation, development, and disease. Scientists are now mapping this genome organization to understand its effects on health and disease better.
Exploring the 4D Nucleome: How Genome Folding Affects Gene Function
The human genome is not just a simple sequence of letters. Instead, it folds and organizes itself in space and time within the cell nucleus. This folding influences how genes switch on and off, guiding vital biological processes. The concept of the 4D nucleome captures this 3D folding along with its dynamic changes over time.
The 4D nucleome plays a significant role in gene regulation, development, and disease. Scientists are now mapping this genome organization to understand its effects on health and disease better. This research could lead to breakthroughs in how we treat genetic disorders.
Understanding the 4D Nucleome and Its Importance
The way DNA folds inside the nucleus affects which genes are active. For example, enhancers can interact with certain genes even if they are far apart along the DNA strand. This happens through complex processes such as loop extrusion, where protein complexes like cohesin pull DNA loops together. These loops form structures called topologically associating domains (TADs), which help organize which genes get expressed.
Moreover, boundaries marked by proteins such as CTCF act like barriers that prevent interactions between regions of DNA that should stay separate. This system ensures cells use genetic information accurately depending on their type and environment.
Mapping Genome Structure in Four Dimensions
The goal of the 4D Nucleome project is to measure genome folding with great detail across different cell types and times. Researchers analyze three-dimensional folding plus how these folds change over time—the fourth dimension. They focus on two main human cells: embryonic stem cells (H1) and fibroblasts (HFFc6).
This project uses various advanced experiments to capture 3D contacts between DNA areas and their relation to nuclear landmarks like nuclear speckles or nucleoli. As a result, scientists gain detailed maps showing thousands of looping interactions per cell type.
Diverse Methods to Study Chromosome Folding
The project compares multiple sequencing-based techniques such as Hi-C, Micro-C, GAM, SPRITE, and others to detect spatial contacts among DNA regions:
- Hi-C & Micro-C: Measure pairwise contact frequencies across chromosomes.
- SPLICE & GAM: Identify multi-locus contact clusters.
- TSA-seq & DamID: Show distances from loci to specific nuclear bodies.
- ChIA-PET & PLAC-seq: Focused studies on contacts involving specific proteins like RNA Polymerase II or CTCF.
This broad toolset allows scientists to confirm findings and create accurate models that represent genome organization even at single-cell resolution.
The Impact of Understanding Genome Folding
By connecting structural features with cellular functions such as gene expression and DNA replication, researchers can predict how sequence variants might affect chromosome folding—a step forward for disease research. Changes in folding patterns can lead to misregulation causing diseases like cancer or genetic disorders.
Studying 4D genome architecture not only reveals spatial control but also guides precision medicine, says a lead researcher from the project.
This knowledge also helps students and future scientists understand that biology is more than just sequences; it involves physical structures changing dynamically inside our cells.
Additionally, to stay updated with the latest developments in STEM research, visit ENTECH Online. Basically, this is our digital magazine for science, technology, engineering, and mathematics. Also, at ENTECH Online, you’ll find a wealth of information.
Reference
- Dekker, J., Oksuz, B. A., Zhang, Y., Wang, Y., Minsk, M. K., Kuang, S., Yang, L., Gibcus, J. H., Krietenstein, N., Rando, O. J., Xu, J., Janssens, D. H., Henikoff, S., Kukalev, A., Andréa, W., Winick-Ng, W., Kempfer, R., Pombo, A., Yu, M., . . . Yue, F. (2025). An integrated view of the structure and function of the human 4D nucleome. Nature. https://doi.org/10.1038/s41586-025-09890-3
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Ashwini Kshirsagar holds a graduate degree in Chemistry and a postgraduate degree in Environmental Science from Shivaji University, Kolhapur. With a strong foundation in scientific principles and a creative flair, she blends her expertise in environmental science with skills in technical writing, graphic design, and video editing. Proficient in Adobe software, Ashwini excels at transforming complex scientific concepts into clear, engaging, and visually compelling content. Her unique ability to merge science and storytelling allows her to create impactful communication materials that are both informative and accessible to a wide audience.
