Recombinant Human DNA topoisomerase 1 (TOP1)

1. TOP1 differentially modulates R-loops across the human genome. PMID: 30060749
2. Results from a study on gene expression variability markers in early-stage human embryos shows that TOP1 is a putative expression variability marker for the 3-day, 8-cell embryo stage. PMID: 26288249
3. High TOP1 expression is associated with aggressive tumor phenotype in breast cancer. PMID: 26959889
4. Ru/Fe bimetallic complexes: Synthesis, characterization, cytotoxicity and study of their interactions with DNA/HSA and human topoisomerase IB. PMID: 29107586
5. two regions of topoisomerase I, the N-terminal and the linker domains, were critical for subnuclear localization of the enzyme. The linker domain and the distal region of the N-terminal domain directed topoisomerase I to the nucleolus, whereas the remaining region of the N-terminal domain was responsible for the nucleoplasmic localization. PMID: 27428351
6. High TOP1 expression is associated with Colorectal Cancers. PMID: 28870917
7. HMGA2 potentiates the clinically important topoisomerase I inhibitor irinotecan/SN-38 in trapping the enzyme in covalent DNA-complexes, thereby attenuating transcription. PMID: 27587582
8. IMMP2L transcription requires Topoisomerase I in human primary astrocytes PMID: 27932244
9. This work identifies ADP-ribose polymers as key determinant for regulating Top1 subnuclear dynamics. PMID: 27466387
10. copper(II) thiosemicarbazone complex may hit human topoisomerase IB and that metal coordination can be useful to improve cytotoxicity of this versatile class of compounds PMID: 27431056
11. High prevalence of anti-topoisomerase I antibody positivity was found among Thai systemic sclerosis patients and this was associated with a high frequency of hand deformity, ACA negativity, a short duration of pulmonary fibrosis in diffuse cutaneous and a lower frequency of Raynaud's phenomenon in limited cutaneous subsets. PMID: 25293362
12. These findings reveal BAZ1B as a key facilitator of topoisomerase I function during DNA replication that affects the response of cancer cells to topoisomerase I inhibitors. PMID: 27050524
13. Results identified TOP1 gene copy gain, a loss of chromosome 20, and new yet unreported TOP1 mutations (R364K and G717R) in close proximity to the SN-38 binding site conferring colon cancer cells resistance to the drug. PMID: 27029323
14. the highest expression of GGH and EGFR was noted in the left-sided colon; the highest expression of DHFR, FPGS, TOP1 and ERCC1 was noted in the rectosigmoid, whereas TYMP expression was approximately equivalent in the right-sided colon and rectum PMID: 26676887
15. We found that the resistant cell lines showed 7-100 fold increased resistance to SN-38 but remained sensitive to docetaxel and the non-camptothecin Top1 inhibitor LMP400 PMID: 26801902
16. Data show that the single-molecule supercoil relaxation assay is a sensitive method to elucidate the detailed mechanisms of type IB topoisomerase (Top1) inhibitors and is relevant for the cellular efficacy of Top1 inhibitors. PMID: 26351326
17. TOP1 bound at promoters was discovered to become fully active only after pause-release. This transition coupled the phosphorylation of the carboxyl-terminal-domain (CTD) of RNA polymerase II (RNAPII) with stimulation of TOP1 above its basal rate, enhancing its processivity. PMID: 27058666
18. Data show that inhibition of DNA-dependent protein kinase catalytic subunit (DNA-PK) prevents type I DNA topoisomerase (Top1) degradation and proteasome activity in camptothecin (CPT)-treated quiescent WI38 cells. PMID: 26578593
19. NO-induced down-regulation of topoisomerase I protein. PMID: 26540186
20. b-ELE could inhibit the proliferation of HepG-2 cells and interfere with the expression and activity of TOPO I and TOPO IIa PMID: 26221582
21. Acridine derivatives inhibited DNA topoisomerases I and II and prevented proliferation of HL-60 cells. PMID: 25960253
22. Topoisomerase-1 and -2A gene copy numbers are elevated in mismatch repair-proficient colorectal cancers. PMID: 25777966
23. 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 PMID: 25815590
24. YB-1 serves as an intracellular promoter of TOPO1 catalytic activity that enhances camptothecin sensitivity through its direct interaction with TOPO1. PMID: 25539742
25. We here report that a substantial number of patients with bile duct or pancreatic cancer have increased TOP1 copy number and increased TOP1/centromere-20 ratio. PMID: 25615400
26. Results show that TOP1 gene is amplified in a subset of breast cancer patients suggesting the gene as a potential biomarker for response to treatment with Top1 inhibitors. PMID: 25855483
27. Results show that camptothecin resistance status of colorectal cancer cells depend on the phosphorylation of TOP1 and the presence of CD44. PMID: 24960044
28. varying expression levels of TOP1 and TDP1 polypeptides in multiple colorectal cancer cell lines and in clinical colorectal cancer samples, are reported. PMID: 25522766
29. CCR6 SNPs are a risk factor for presence of anti-topoisomerase I antibodies in systemic sclerosis. PMID: 26314374
30. ERCC1-XPF participates in DNA repair of the Top1-DNA damage complex. PMID: 26025908
31. both TOP1 and TDP1 were upregulated in the tumor tissue compared to the adjacent non-tumor tissue in non-small cell lung cancer tissue PMID: 25987486
32. mutations at the hydrophobic or charged residues of the putative polymer binding sites do not interfere with the ability of poly(ADP-ribose) to antagonize the antitumor activity of topoisomerase I poisons. PMID: 25227992
33. No TOP1 copy number changes were found in patients with de novo diffuse large B-cell lymphoma or relapsed DLBCL treated with chemotherapy regimens including TOP2-targeting drugs. PMID: 25931012
34. Mutation of Gly717Phe in human topoisomerase 1B has an effect on enzymatic function, reactivity to the camptothecin anticancer drug and on the linker domain orientation PMID: 25910424
35. Top1 cleavage events generate short deletions; Top1 also promotes nick religation at rNMP sites PMID: 25887397
36. analysis of how human and yeast DNA topoisomerase I domain interactions impact enzyme activity and sensitivity to camptothecin PMID: 25795777
37. Study describes a molecular mechanism that operates at functional androgen-regulated enhancers and identify DNA topoisomerase I as a critical DNA-nicking enzyme involved in the process of cell-specific, ligand-driven enhancer activation. PMID: 25619691
38. The combination of Top1 inhibitors with VE-821 inhibited the phosphorylation of ATR and Chk1. PMID: 25269479
39. DNA topoisomerases I and II are involved in initiating APH-induced common fragile site breakage at RET PMID: 24040417
40. Collectively, these findings suggest that the combinatorial inhibition of MET and Top1 is a potentially efficacious treatment strategy for Small cell lung cancer . PMID: 24327519
41. our data show for the first time that HIF-1alpha is strongly correlated with resistance to topoisomerase I inhibitors in hepatocellular carcinoma. PMID: 24362462
42. Analysis of the dynamical properties of DNA topoisomerase 1B bound to the more biologically relevant supercoiled substrate reveals an increased number of protein-DNA interactions and, most strikingly, the presence of a secondary protein-DNA binding site. PMID: 25056319
43. homologous recombination seems relevant especially for Top1 and, to a lesser extent, for Top2 inhibitors. We also found and discuss differential pathways among Top1 inhibitors and Top2 inhibitors PMID: 24130054
44. key factors in a molecular pathway connecting Top1 inhibition and human HIF-1alpha protein regulation and activity, widening the biologic and molecular activity of camptothecin PMID: 24252850
45. [review] Telangiectasia and anti-CENP or anti-topo I antibodies in the presence of Raynaud's phenomenon and proximal skin thickening increase the sensitivity of a very early diagnosis of systemic sclerosis from 57% to 97%. PMID: 24461384
46. This property facilitates the deprotonation of the 5' DNA end, suggesting that this is the limiting step in the topoisomerase religation mechanism. PMID: 23368812
47. These results suggest that topo I is a novel target of erlotinib and a combination of TKIs with topo I inhibitors may be an effective treatment for breast cancer. PMID: 24399039
48. Critical endogenous pathogenic lesions are associated with neurodegenerative syndromes arising from aberrant TOP-1 DNA. PMID: 24793032
49. A fully functional linker is required to confer camptothecin sensitivity to topoisomerase I. PMID: 24004603
50. MiR-23a could directly bind to 3'untranslated region of TOP1 mRNA, and suppress the corresponding protein expression. PMID: 24103454

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HGNC: 11986

OMIM: 126420

KEGG: hsa:7150

STRING: 9606.ENSP00000354522

UniGene: Hs.472737