Abstract
An extraordinary degree of condensation is required to fit the eukaryotic genome inside the nucleus. This compaction is attained by first coiling the DNA around structures called nucleosomes. Mammalian genomes are further folded into sophisticated three-dimensional (3D) configurations, enabling the genetic code to dictate a diverse range of cell fates. Recent advances in molecular and computational technologies have enabled the query of higher-order chromatin architecture at an unprecedented resolution and scale. In T lymphocytes, similar to other developmental programs, the hierarchical genome organization is shaped by a highly coordinated division of labor among different classes of sequence-specific transcription factors. In this review, we will summarize the general principles of 1D and 3D genome organization, introduce the common experimental and computational techniques to measure the multilayer chromatin organization, and discuss the pervasive role of transcription factors on chromatin organization in T lymphocytes.
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