The study marks a major advance in understanding how DNA’s three-dimensional structure influences human biology. Researchers at Northwestern University, in collaboration with the 4D Nucleome Project, have produced the most detailed maps to date of how the genome is organized in three dimensions across time and space. Their findings are reported in a new study published in Nature.

Based on experiments in human embryonic stem cells and fibroblasts, the research offers a broad view of how genes interact, fold into complex three-dimensional structures, and reposition themselves as cells perform normal functions and undergo division. The study was co-led by Feng Yue, the Duane and Susan Burnham Professor of Molecular Medicine in the Department of Biochemistry and Molecular Genetics.

Figure 1. A 4D View of Genome Organization

Yue emphasized that understanding how the genome folds and reorganizes in three dimensions is critical to understanding cellular function. He noted that the new maps provide an unprecedented view of how genome structure regulates gene activity across space and time. Figure 1 shows A 4D View of Genome Organization.

Inside the cell nucleus, DNA is not arranged as a simple linear strand but is folded into loops and distinct domains that bring far-flung regions of the genome into close proximity. These three-dimensional structures help determine which genes are switched on or off, influencing development, cell identity, and disease.

Constructing a Unified 4D Genome Dataset

To capture this complexity, Yue and his international collaborators applied a broad range of genomic technologies to fibroblasts and human embryonic stem cells, generating a unified dataset. The effort revealed more than 140,000 chromatin loops per cell type, pinpointing the elements that form different loop anchors and their roles in gene regulation. It also produced comprehensive classifications of chromosomal domains, including their spatial positions within the nucleus, as well as high-resolution, single-cell 3D models of entire genomes that show how each gene is arranged relative to neighboring genes and regulatory elements.

The maps show how genome architecture differs from one cell to another and how these structural variations are linked to key processes such as transcription and DNA replication.

Evaluating Methods and Predicting Genome Folding

Because no single method can fully capture the genome’s four-dimensional structure, the study systematically evaluated the strengths and limitations of the technologies used. Through extensive benchmarking, the researchers identified which assays are best suited for detecting chromatin loops, defining domain boundaries, or resolving subtle differences in nuclear positioning, offering a practical guide for future studies.

In addition, the team developed computational tools that can predict genome folding directly from DNA sequence. This capability opens the door to estimating how genetic variants, including disease-associated mutations, may alter three-dimensional genome architecture without the need for complex experiments. Yue noted that this advance could speed the identification of pathogenic variants and uncover previously hidden mechanisms underlying inherited disorders.

Yue also emphasized that because most disease-linked variants lie in non-coding regions of the genome, understanding their impact on gene regulation is essential. Three-dimensional genome organization, he said, provides a powerful framework for predicting which genes are likely to be affected by these pathogenic changes.

Toward a Fuller Picture of the Genome

The study highlights a growing understanding that genome function cannot be explained by DNA sequence alone and that its three-dimensional shape plays a crucial role. By linking DNA folding, chromatin looping, gene regulation, and cellular behavior, the work brings the field closer to a comprehensive view of how genetic information operates within living cells.

Looking ahead, Yue said these tools could help unravel how errors in genome folding contribute to cancer, developmental disorders, and other diseases, paving the way for diagnostics and therapies based on genome structure [1]. He added that, having already observed widespread 3D genome alterations in cancers such as leukemia and brain tumors, the next goal is to explore how these structures might be selectively targeted and modified using drugs, including epigenetic inhibitors.

References:

1. https://scitechdaily.com/researchers-unveil-a-4d-blueprint-of-the-human-genome/

Cite this article:

Janani R (2025), Researchers Create the First 4D Map of the Human Genome, AnaTechMaz, pp. 644