Type II topoisomerases are topoisomerases that cut both strands of the DNA helix simultaneously in order to manage DNA tangles and supercoils. They use the hydrolysis of ATP, unlike Type I topoisomerase. In this process, these enzymes change the linking number of circular DNA by ±2. … See more Type II topoisomerases increase or decrease the linking number of a DNA loop by 2 units, and it promotes chromosome disentanglement. For example, DNA gyrase, a type II topoisomerase observed in E. coli and most other See more There are two subclasses of type II topoisomerases, type IIA and IIB. • Type IIA topoisomerases include the enzymes See more Strand passage Type IIA topoisomerase operates through a "two-gate" mechanism (though this is a historical notation), … See more Small molecules that target type II topoisomerase are divided into two classes: inhibitors and poisons. Due to their frequent presence in proliferating eukaryotic cells, … See more Type IIA topoisomerases are essential in the separation of entangled daughter strands during replication. This function is believed to be … See more Type IIA Type IIA topoisomerases consist of several key motifs: • an … See more Catenation is the process by which two circular DNA strands are linked together like chain links. This occurs after DNA replication, where two single strands are catenated and can … See more WebApr 7, 2015 · This study aims to investigate clinical significance of topoisomerase 2A (TOP2A) expression and TOP2A gene change in operable invasive breast cancer. This is a retrospective analysis, which ...

Type II topoisomerase - Wikipedia

WebThe most common variant is a splice site mutation (IV14+1G>A [also referred to as DPYD*2A]) and is estimated to confer deficient DPD enzyme activity in 2%–3% of patients, … WebSep 1, 2024 · DNA topoisomerase 2, which is ubiquitously expressed in eukaryotic cells, is an essential nuclear enzyme that promotes cell survival by regulating DNA topology and chromatid separation. This enzyme has been validated as a target for anticancer agent screening. It can be poisoned by common chemotherapeutics, such as etoposide and … leafkey

Structure of a topoisomerase II–DNA–nucleotide complex reveals …

WebMar 21, 2024 · TOP2A (DNA Topoisomerase II Alpha) is a Protein Coding gene. Diseases associated with TOP2A include Malignant Peripheral Nerve Sheath Tumor and Neuroblastoma . Among its related pathways are Transport of the SLBP independent Mature mRNA and Cell Cycle, Mitotic . Gene Ontology (GO) annotations related to this gene … WebThis gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This nuclear enzyme is involved in processes such as chromosome condensation, chromatid separation, and the relief of torsional stress that occurs during DNA transcription and replication. It catalyzes the transient breaking and … WebSep 1, 2024 · However, recent studies have suggested that the topoisomerase 2a isozyme is predominantly responsible for the carcinogenic side effects associated with etoposide and doxorubicin chemotherapy. Thus, we need to find a promising topoisomerase 2-targeting anticancer agent that avoids these carcinogenic side effects. Recent studies have found … leaf it