anti-Topoisomerase (DNA) II beta 180kDa (TOP2B) Antibodies

Mouse (Murine) Topoisomerase (DNA) II beta 180kDa (TOP2B) interaction partners

1. Top2beta controls spinal motor neurons (MN) migration and connectivity; is not required for MN generation or survival; has a selective role in columnar specification. In absence of Top2beta, phrenic MN identity is eroded, while other motor columns are partially preserved but fail to cluster to their proper position. In Top2beta-/- mice, peripheral connectivity is impaired as MNs exhibit a profound deficit in terminal b...

2. our data establish a combinatorial cell-autonomous and non-cell-autonomous role for Top2b in the late stage of photoreceptor differentiation and maturation

3. We demonstrated that Nup98-TopIIbeta and Nup98-SETBP1 negatively regulate the XPO1-mediated protein export. Our results will contribute to the understanding of the molecular mechanism by which the Nup98-fusion proteins induce tumorigenesis.

4. TOP2beta as a factor involved in regulating granulosa cell genomic integrity and follicle atresia.

5. Results identified topoisomerase IIbeta (Top2beta) as a novel determinant for camptothecin sensitivity.

6. Top IIbeta might be a down-stream target of Nurr1, which might influence the processes of axon genesis in dopaminergic neurons via the regulation of TOP IIbeta expression.

7. Findings suggest a chromatin-based targeting of Top2beta to regulatory regions in the genome to govern the transcriptional program associated with neuronal differentiation and longevity.

8. Data suggest that activity of TOP2B in elongating spermatids is strongly inhibited by PARP1 and PARP2, and this is in turn counteracted by the PAR-degrading activity of PAR glycohydrolase.

9. proteasomal degradation of TOP2beta induced by the TOP2-DNA covalent complex or the TOP2 circular clamp is due to transcriptional arrest but not DNA damage

10. DNA topoisomerase II beta deficiency severely affects cerebral cortex stratification: no subplate is discernible, and neurons born at later stages of corticogenesis fail to migrate to the superficial layers.

11. A nuclear matrix-associated topoisomerase IIB (TOP2B) interacting with an extracellular Mn2+/Ca2+-dependent nuclease cleaves sperm DNA into loop-sized fragments.

12. Results support a role of topoisomerase IIbeta in activation/repression of developmentally regulated genes at late stages of neuronal differentiation.

13. These results suggest that the defect in establishing neuromuscular junctions in top2beta knockout mice could be due to the lack of TopIIbeta-mediated neurite outgrowth.

14. VP-16-induced carcinogenesis involves mainly the beta rather than the alpha isozyme of Top2; VP-16-induced DNA sequence rearrangements and double-strand breaks are found to be Top2beta-dependent

15. NRF-1 can also directly interact with poly(ADP-ribose) polymerase 1 (PARP-1) and co-purify the PARP-1.DNA-PK.Ku80.Ku70.topoisomerase IIbeta-containing protein complex.

Human Topoisomerase (DNA) II beta 180kDa (TOP2B) interaction partners

1. We report here that both known type II topoisomerases Top2a and Top2b are present in mammalian mitochondria, with especially Top2b regulating the supercoiling state of mtDNA. Loss of Top2b or its inhibition by ciprofloxacin results in accumulation of positively supercoiled mtDNA, followed by cessation of mitochondrial transcription and replication initiation, causing depletion of mtDNA copy number.

2. our findings suggest that E2F1-topoII beta signaling may play a role in regulation of cell cycle exit and neuronal differentiation.

3. our data primarily indicate that topoIIbeta can be used to estimate neuronal differentiation in medulloblastoma

4. The article discusses origin of topoisomerase II beta, its structure, activities reported in vitro and in vivo along with implications in cellular processes namely transcription, DNA repair, neuronal development, aging, HIV-infection and cancer. (Review)

5. recent data point to a critical role of topoisomerase II beta (TOP2B), which is a primary target of anthracycline poisoning, in the pathophysiology of anthracycline-induced congestive heart failure .

6. The decatenation checkpoint is regulated, not only by topo IIalpha, as previously reported, but also by topo IIbeta. The decatenation checkpoint is most efficient when both isoforms are present. Deletion of most of the C-terminus of topo IIbeta, while preserving the nuclear localization signal, and mutation of Y656 in topo IIbeta inhibits the decatenation checkpoint and sensitivity to topo II-targeted drugs.

7. These results explain why hTOPIIa and hTOPIIa are differentially affected by various poisons and demonstrate the utility of C. elegans in understanding the genetics of drug responses.

8. TOP2B is positioned to solve topological problems at diverse cis-regulatory elements and its occupancy is a highly ordered and prevalent feature of CTCF/cohesin binding sites that flank TADs.

9. Data indicate that cortex involvement, lower World Health Organization grade and DNA topoisomerase II positivity were strong predictors for preoperative epileptic seizures.

10. during early development, TOP2A is likely to have a role in cell proliferation, whereas TOP2B is expressed in post-mitotic cells and may be important in controlling expression of long genes even at this early stage.

11. TopoIIbeta is involved in the cascade of coactivator complexes that are recruited to LTR for regulation of HIV-1 transcription.

12. Cinobufacini inhibited the proliferation of the HepG-2 cells induced apoptosis in a dose- and time-dependent manner and downregulated the mRNA and protein expression levels of TOPO I and TOPO II

13. A direct interaction between Ku70/86 and BRG1 brings together SWI/SNF remodeling capabilities and TOP2beta activity to enhance the transcriptional response to hormone stimulation.

14. Human cytomegalovirus IE1 exon 4 interacts with Topoisomerase IIbeta (TOPOIIbeta), whose activity is required for viral genome persistence and maintenance via binding to a cis-acting viral maintenance element.

15. This study demonstrated that top IIbeta overexpression is necessary for RA-induced neuronal differentiation.

16. Data suggest that DNA topoisomerase IIbeta (topoIIbeta) silencing can significantly alter the gene expression pattern of genes involved in variety of biological processes and signal transduction pathways.

17. Proteolytic degradation of Top2 enables the processing of Top2.DNA and Top2.RNA covalent complexes by TDP2.

18. There is an association between chemosensitivity and Pgp, GST-pi and Topo II expression in gastric cancer.

19. These results are consistent with the hypothesis that etoposide quinone contributes to etoposide-related leukemogenesis through an interaction with topoisomerase IIbeta.

20. Downregulating topoisomerase IIbeta confers resistance specifically to mitoxantrone.