title: DNA topology and transcription.
abstract: Chromatin is a complex assembly that compacts DNA inside the nucleus while providing the necessary level of accessibility to regulatory factors conscripted by cellular signaling systems. In this superstructure, DNA is the subject of mechanical forces applied by variety of molecular motors. Rather than being a rigid stick, DNA possesses dynamic structural variability that could be harnessed during critical steps of genome functioning. The strong relationship between DNA structure and key genomic processes necessitates the study of physical constrains acting on the double helix. Here we provide insight into the source, dynamics, and biology of DNA topological domains in the eukaryotic cells and summarize their possible involvement in gene transcription. We emphasize recent studies that might inspire and impact future experiments on the involvement of DNA topology in cellular functions.
authors.affiliation: Laboratory of Pathology; National Cancer Institute; Bethesda, MD USA.
authors.forename: Fedor
authors.initials: F
authors.lastname: Kouzine
authors.affiliation: Laboratory of Pathology; National Cancer Institute; Bethesda, MD USA.
authors.forename: David
authors.initials: D
authors.lastname: Levens
authors.affiliation: Laboratory of Pathology; National Cancer Institute; Bethesda, MD USA.
authors.forename: Laura
authors.initials: L
authors.lastname: Baranello
mesh_terms: D002467:Cell Nucleus / Q000235:genetics; D002843:Chromatin / Q000235:genetics; D004247:DNA / Q000235:genetics*; D005057:Eukaryotic Cells / Q000378:metabolism; D016678:Genome / Q000235:genetics; D006801:Humans; D014158:Transcription, Genetic / Q000235:genetics*
chemical_list: D002843:Chromatin; D004247:DNA
keywords: DNA topoisomerases; DNA topological domain; DNA topology; torsional stress; transcription
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